Germplasm Enhancement of Maize

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Objectives
Materials and Methods
Results and Discussion
Publications and Field Days
Table 1
Table 2
Table 3
Table 4
Table 5

GEM - 2005 Public Cooperator's Report

NOTE: The information in this report is shared cooperatively. The data are not published, but are presented with the understanding that they will not be used in publications without specific consent of the public cooperator.

 

GEM Breeding Crosses, Topcrosses, and Advanced Lines for Improving Drought tolerance, Grain Mold resistance, and Corn Earworm Resistance

Wenwei Xu

Texas A&M University Agric. Res. and Ext. Center, Lubbock, Texas

Objectives

The specific objectives of this project includes: (1) to conduct field trials for drought tolerance, CEW resistance, grain mold and yield of the topcrosses of the GEM lines with Holden’s (LH185, LH198, LH200, LH247, and LH283) and public tester lines; (2) to assay aflatoxin of 10 hybrids of the GEM lines; (3) To advance and characterize inbred lines from GEM breeding crosses; (4) to perform second-year field evaluation of 40 new GEM breeding crosses for drought tolerance, grain mold resistance, and CEW resistance; and (5) to characterize the 16 new recommended lines provided by the GEM Coordinator for drought, heat tolerance, and  resistance.  Most the data are being analyzed when this report is prepared.  This report provides a detailed information on 40 GEM breeding crosses in 2005 and combined analysis of the 2004 and 2005 data.

Materials and Methods

Objective 1: About 130 topcrosses of GEM lines were tested at three locations in the Texas High Plains (Lubbock, Halfway and Etter) and at four south Texas locations (College Station, Beeville, Corpus Christi, and Weslaco).  The Lubbock and Halfway sites has well-watered and drought-stressed treatments.  Data are being analyzed and results are not included in this report.

Data in 2004 and 2005 (only Weslaco site in south Texas available) show that lines from AR03056:N0902, SCROGP3:N2017, SCROPG3:N1411a, FS8A(T):N1801, DK888:N11 combine well with the used testers and produce high yielding hybrids.  For examples, cross (SCROPG3:N1411a-1) x B110 produced 274 bu/a at Dalhart in the north Texas panhandle in the 2004 Texas Corn Performance Test that used 36 entries (25 Bt, 16 non-Bt, and mostly commercial hybrids) and had an average yield of 272 bu/a.  The cross (SCROPG3:N1411a-1) x LH200 showed similar performance in 2004 tests and is in 2005 Texas State Corn Performance Test at Dalhart (north TX) and Prosper (central TX).  Use of LH200 would facilitate the line’s adoption along with biotech traits.  The official release proposal for the line from SCROPG3:N1411a will be submitted in the fall of 2005.

Objective 2: Ten topcrosses of GEM lines including (CUBA117:S15)-3-2 x LH185, (CUBA117:S15)-1A-1 x Tx205, C3S1B73-3-1 x Tx205, (AR03056:N0902)F9-1-1 x LH200, LH200 x (SCROGP3:N1411a)F9-1-2 were grown along with 15 hybrids in Lubbock, Halfway, Corpus Christi and Beeville for aflatoxin assays where the test plots were inoculated with A. flavus.  These hybrids were chosen for good performance in previous years.  Some hybrids are expected to have high yield and low aflatoxin in the southern U.S.  Grain samples and data are being analyzed.

Objective 3: About 300 F5-F8 lines were advanced, mostly from ANTIGO01:N16, ANTIGO03:N12, AR16026:N12, AR03056:N0902, BR52051:N04, CH05012:N12, CUBA164:S20, CUBA117:S15, DK888:N11, DKXL380:S08a, FS8A(T):N11a, and GUAT209:N1925.  The more advanced lines were also grown in replicated trials for characterizing their drought/heat tolerance, pest resistance, and overall agronomic traits.

Objective 4: Evaluation of 41 GEM breeding crosses for the second year in Lubbock under three regimes of water stress. The 41 GEM breeding crosses and three checks (Garst 8285 and Pioneer hybrids 34K77 and 3223) were grown under three water treatments in Lubbock in 2004 and 2005.  Planting date for 2005 was April 19.  Under each water treatment, a randomized complete block design with three replications was used.  Each plot was a 18 foot-long row with 40-inch row-spacing.  The stand was thinned to 22,646 plants/a.  Three water treatments (100% ET, 50% ET and V-10 drought stresses) were in the same field, and each received a total of 16.54, 5.1, and 7.35 acre-inch irrigation water during the season.  Total precipitation from planting to August 30 was about 10 inches.  The 50% ET irrigation provides a moderate-severe stress throughout the season.  In V-10 drought stress, irrigation was withheld 10 days before and after flowering to create a severe drought stress around the flowering time.  Plants in V-10 showed moderate to severe drought stress symptom around flowering time. 

Objective 5: 16 lines from the GEM coordinator were tested in a replicated trial under full-irrigation and V-10 drought stress in Lubbock, TX Section 1 for details) for a second year to confirm the results in 2004.  drought stress  In 2004, the best lines included CUBA164:S2012-444-1-B-B, FS8B(T):N11a-110-1-B-B, DKXL370:N11a20-199-2-B-B-B, DKXL370:N11a20-234-2-B-B-B, and UR11003:S0302-937-1-B-B were better than others.  The best line was CUBA164:S2012-444-1-B-B, it had no leaf firing, low CEW damage, low grain mold, low percent of barren plants, good drought and stay green rating.  Plant height, stage green rating and other agronomic data were collected during the growing season.  The CEW feeding damages were measured on 10 ears.  The data from 2005 are being analyzed.

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Results and Discussion

The 2005 data for well-irrigated, 50% ET and V10 drought stress are presented in Tables 1 to 3 respectively.  Three crosses BR52051:N0417, CML323:N15, and GUAD05:N3215 did not have enough seeds and were not used in 2005.  Overall, the 2004 and 2005 results are similar.

CEW resistance and yield of 41 GEM breeding crosses under well irrigation in 2004 and 2005:  The average yield was 130 bu/a ranging from 75 (CHIS740:S14) to 183 bu/a (P3223).  The average yield of check hybrids P3223, P34K77, and Garst 8285 was 174 bu/a compared to 182 bu/a in 2004. UR13010:N0613, CML323:N15, AR17056:S19, UR11003:S17b, NS1:S08, UR13085:N0204, UR05071:S04, AR17056:S12, and AR16024:N1210 yielded 162 to 143 bu/a. The yields of top ten breeding crosses are statistically equal to the check means.  These crosses also have nice lloking plants with dark green leave, long ears and large kernels (Tables 1 and 4).  CHIS740:S14 had lowest yield because it was late and highly susceptible to high temperatures.  In 2004, the yield of several crosses was affected by the high green snap that occurred on June 18 when a storm with over 50 miles wind struck the field.  This was the only time we have had observed green snap damage in our location since 1998.

There was a significant difference among the entries in all other traits.  The CEW penetration, an indicator of CEW resistance and measured by larval penetration from ear tip toward the ear base over ten ears per replication, ranged from 5.3 to 9.1 cm with a mean of 7.3 cm.  UR0571:S04 and GUTA209:N11c had CEW damage below test mean (7.3 cm).  Grain mold was not significant among entries but a few crosses had lower grain mold than others.  High grain mold is usually correlated high mycotoxin (aflatoxin and fumonisin) contamination.  Several crosses have long ears and large kernels (Table 4).

Yield and stay green of GEM breeding crosses under 50% ET and V-10 drought stresses: The average yield of 50% ET and V-10 stresses was 57.5 and 59.4 bu/a respectively.  The average yield of three checks was 107 and 105 bu/a under 50% ET and V-10 drought stress, a 40% yield reduction in comparison to the well-irrigated test.  Under this stress condition, one should consider the crosses with more ears per plant (less barren plants), better ear rating, lower stay green rating value, and low grain mold.  Stay green rating should be examined along with the maturity. . Most of the top yielding crosses tend to have these characters The best performing breeding crosses under 50% ET and V-10 stress include AR16026:N1210, AR13026:N08a04, BR52051:N0417, BR51721:N2012, CML323:N15 (one year data), UR13085:N0204, UR13010:N0613, and UR11003:S17b (Table 5).

Publications and Field Days

Field days:

GEM germplasm was showed and discussed in the field days on August 19 at Halfway, TX and on August 26 at Etter, TX.

Publications discussed GEM germplasm:

Wenwei Xu, Gary Odvody, W. Paul Williams, Patrick Porter, and Greg Cronholm. 2005 Introgression of tropical germplasm to reduce the damage of ear-feeding pests and develop products for organic corn production.  ASA-CSSA-SSSA Annual Meetings Abstract, Salt Lake City, UT, Nov. 6-10, 2005.

Xu, W. and Gary Odvody: 2005. Registration of maize germplasm lines Tx204 and Tx205. Crop Science (submitted).

Wenwei Xu, Jinfen Zhang, Gary Odvody, and W. Paul Williams. 2005. Corn hybrids with exotic germplasm and low-aflatoxin.  Abstract of 2005 Aflatoxin/Fumonisin Elimination and Fungal Genomics Workshops.  October 23-28, 2005, Raleigh, NC.

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Table 1. Days to pollen shedding (DTP), plant height (PHT, cm), ear height (EHT), husk rating (HUSK), root lodging (RTL) stay green rating (SG822), CEW ear penetration (CEW, cm), ear length (EL, cm), grain mold (%), and yield (YBU, bu/a) of GEM breeding crosses under well-irrigated condition in Lubbock, TX in 2005.

ENO

Entry

DTP

PHT

EHT

Husk

RTL

SG822

CEW

EL

RATIO

MOLD

YBU

Y-R

%CK

Note 1

Note2

1

AR13026:N08a04

67

253

111

2.7

0.0

2.2

8.5

20.1

42.3

9.3

154

11

89

Y-D/LK

LE

2

AR13026:N08c06

66

225

78

3.0

0.0

3.8

9.0

21.4

41.8

7.0

122

33

70

Y-MK

LE

3

AR13026:S15

68

240

113

4.0

0.0

2.5

6.8

19.6

34.7

5.3

129

30

74

Y-F/LK

LE

4

AR13035:S11b01

69

244

114

3.5

0.0

2.3

7.4

19.7

37.6

5.7

151

15

87

Y-D/LK

LE,DG,UL

5

AR16021:S08b

70

231

90

3.2

0.0

2.0

8.0

20.2

39.8

8.0

145

18

83

Y-D/MK

DG, LE

6

AR16021:S08a01

69

246

117

3.3

0.0

2.2

7.3

19.3

37.8

6.7

141

20

81

Y-D/MK

LE

7

AR16021:S08b09

67

233

94

3.0

0.0

2.8

8.0

20.9

38.5

6.0

130

29

74

Y-D/MK

 

8

AR16026:N1210

69

245

112

3.3

0.0

2.3

8.4

21.1

40.1

10.3

139

22

80

Y-D/LK

DG, lE

9

AR16026:S1716

69

234

101

3.0

0.0

2.2

6.7

19.8

33.8

5.3

154

12

89

Y-D/LK

LE,DG

10

AR16035:S0209

68

228

84

3.2

0.0

3.0

8.1

20.2

40.5

5.7

124

31

71

Y-D/SK

 

11

AR17026:N1019

70

238

100

3.2

0.0

2.7

8.7

22.1

39.4

6.7

109

36

63

Y-D/LK

 

12

AR17056:N13

67

239

94

3.2

1.0

2.5

8.0

20.0

39.9

5.0

147

16

85

Y-D/LK

LE

13

AR17056:S12

68

251

116

3.3

0.0

2.7

6.6

20.1

32.8

5.0

155

10

89

Y-F/LK

DG,LE

14

AR17056:S1216

69

230

90

3.3

0.0

2.7

7.0

18.4

38.2

6.7

133

28

76

Y-D/MK

 

15

AR17056:S19

69

240

120

2.3

0.0

2.2

7.5

20.3

37.0

5.7

166

3

95

Y-D/LK

LE,DG,UL

16

BR51721:N2012

72

245

112

3.2

0.0

2.0

7.6

21.1

35.9

8.3

163

5

94

Y-D/LK

DG,LE, UL

18

CH04030:N0301

67

230

104

2.7

0.0

2.5

9.5

21.1

45.1

11.0

139

21

80

Y-D/LK

 

19

CH05015:F27

69

221

104

3.2

4.3

2.3

7.4

19.7

37.6

7.3

134

26

77

Y-F/LK

LE

20

CHIS740:S14

74

300

149

4.2

0.0

1.7

7.5

19.9

38.0

9.3

74

41

43

W-D/LK

HS

21

CML247:N17c

73

220

96

3.0

2.2

2.7

7.1

18.6

38.4

7.7

88

39

51

Y-D/LK

 

23

CUBA117:S1542

72

245

108

3.7

0.0

2.2

5.9

18.2

32.8

4.3

138

23

79

Y-D/LK

DG

24

CUBA164:S11c

71

257

122

3.7

0.0

2.7

5.6

20.0

28.0

4.7

137

24

79

Y-D/LK

LE,DG

25

DK888:S08b

75

239

117

4.0

0.0

1.7

6.5

19.8

32.7

6.7

84

40

48

Y-D/MK

 

26

FS8A(T):N1804

71

223

96

2.5

0.0

2.7

9.2

21.2

43.4

13.3

123

32

71

Y-D/LK

DG,LE

28

GUAT209:N11c

71

253

119

4.0

4.0

2.6

5.1

18.7

27.4

3.7

146

17

84

Y-D/MK

 

29

NEI9004:S28

72

236

106

3.8

0.0

2.2

7.0

18.2

38.3

6.0

122

34

70

Y-D/MK

DG,LE

30

NEI9008:S17c

72

231

87

3.3

0.0

1.7

6.4

18.8

34.1

6.7

133

27

77

Y-F/MK

LE,DG,UL

31

NS1:S08

70

231

101

3.2

0.0

2.0

7.1

20.2

34.7

5.0

161

7

92

Y-D/LK

LE,DG,UL

32

SCROGP3:N14

73

267

130

3.3

9.1

1.8

7.2

23.2

31.2

4.0

143

19

82

Y-D/LK

DG, LK

33

UR05071:S04

70

247

123

3.8

0.0

2.2

5.6

20.3

27.6

4.0

152

14

87

Y-D/LK

LE,DG,UL

34

UR05071:S0409

69

235

85

3.3

0.0

2.8

8.3

19.5

42.5

6.3

136

25

78

Y-D/LK

DG

35

UR10001:S18

70

222

89

3.7

0.0

2.8

7.7

18.8

41.0

5.7

119

35

68

Y-D/LK

LE,DG,UL

36

UR11003:S17b

70

233

107

3.7

0.0

2.8

6.2

19.3

32.1

4.3

157

9

90

Y-D/LK

LE,DG

37

UR11003:S17h

67

236

101

2.8

0.0

3.2

7.5

19.9

37.5

5.0

105

37

60

Y-D/LK

LE,DG

38

UR13010:N0613

68

233

95

3.3

0.0

2.5

7.3

21.2

34.5

6.3

163

4

94

Y-D/LK

LE, DG

39

UR13085:N0204

69

220

97

2.8

0.0

2.5

9.1

21.4

42.4

9.3

154

13

88

Y-D/LK

 

40

UR13085:N0207

70

223

92

3.0

0.0

2.8

8.0

20.2

39.4

7.7

100

38

58

Y-D/MK

 

41

UR13088:S0604

68

235

105

3.5

0.0

3.2

6.4

19.2

33.4

4.3

159

8

92

Y-D/LK

LE,DG

42

P34K77

68

241

91

3.7

0.0

2.2

6.9

20.3

33.9

4.3

181

1

104

Y-D/LK

DG

43

P3223

73

234

108

3.5

0.0

1.8

5.9

18.6

31.9

4.3

180

2

103

Y-D/LK

LE,DG

44

Garst 8285

70

243

105

4.0

0.0

2.2

7.2

21.8

32.9

4.0

161

6

92

Y-D/LK

 

 

CK mean

70

239

101

3.7

0.0

2.1

6.7

20.2

32.9

4.2

174

 

 

 

 

 

Mean

70

238

105

3.3

0.5

2.4

7.3

20.1

36.6

6.4

138

 

 

 

 

 

CV%

2

5

12

14.4

###

14.0

13.8

4.2

14.5

41.1

11

 

 

 

 

 

LSD 0.05

2

19

20

0.8

3.6

0.5

1.6

1.4

8.6

4.2

25

 

 

 

 

LK = large kernel, LE =long ear, DG = dark green leaf, HS = heat susceptible.

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Table 2. Days to pollen shedding (DTP), plant height (PHT, cm), ear height (EHT), root lodging (RTL) stay green rating on August 3 and 22 (SG803 and SG822), ears per plant (EARPP),  grain mold (%), and yield (YBU, bu/a) of GEM breeding crosses under 50% ET irrigated condition in Lubbock, TX in 2005.

ENO

Entry

DTP

PHT

EHT

RTL

SG803

SG820

EARPP

MOLD

YBU

Y-R

%CK

1

AR13026:N08a04

71

172

70

16.9

2.3

3.3

0.6

8.0

34

19

51.3

2

AR13026:N08c06

69

175

81

30.1

2.2

4.0

0.7

9.3

38

14

57.5

3

AR13026:S15

70

192

97

6.6

2.5

4.0

0.6

14.0

19

36

28.7

4

AR13035:S11b01

70

183

79

16.8

2.2

3.5

0.6

7.7

33

21

49.2

5

AR16021:S08b

68

198

86

6.5

2.3

3.8

0.8

6.7

58

5

87.1

6

AR16021:S08a01

69

175

71

6.1

2.0

3.8

0.8

8.0

33

22

48.9

7

AR16021:S08b09

71

175

70

14.4

2.2

3.7

0.7

11.0

29

25

43.8

8

AR16026:N1210

70

183

94

10.8

2.2

3.3

0.7

16.7

33

20

49.3

9

AR16026:S1716

69

185

77

15.5

2.5

4.0

0.9

9.0

52

9

78.5

10

AR16035:S0209

70

171

57

4.6

3.0

4.2

0.7

10.0

25

32

37.3

11

AR17026:N1019

71

162

72

16.7

2.2

3.7

0.6

11.0

27

30

40.3

12

AR17056:N13

69

188

85

18.6

2.7

3.7

0.7

8.7

28

28

41.5

13

AR17056:S12

70

174

81

6.1

2.0

3.5

0.7

10.0

28

27

42.3

14

AR17056:S1216

71

167

71

6.1

2.7

3.7

0.8

8.7

41

12

60.7

15

AR17056:S19

69

181

0

2.0

2.2

4.0

0.6

9.3

36

16

53.9

16

BR51721:N2012

72

187

82

3.0

2.0

3.8

0.9

7.7

57

6

85.4

18

CH04030:N0301

70

155

64

13.7

2.0

3.5

0.8

10.0

37

15

56.0

19

CH05015:F27

70

131

79

14.5

2.0

3.2

0.8

12.7

27

29

40.9

20

CHIS740:S14

79

211

10

24.6

2.2

3.0

0.3

4.7

3

41

5.2

21

CML247:N17c

75

145

66

12.2

2.8

3.5

0.4

8.3

10

39

15.3

23

CUBA117:S1542

74

180

81

2.0

2.2

3.7

0.6

9.0

25

33

36.7

24

CUBA164:S11c

71

191

99

13.6

2.2

3.5

0.7

9.7

30

24

44.7

25

DK888:S08b

77

189

3

0.0

2.3

3.2

0.5

7.7

10

40

15.0

26

FS8A(T):N1804

72

174

88

10.4

2.0

3.7

0.8

9.0

35

18

52.8

28

GUAT209:N11c

72

175

90

0.0

2.0

3.7

0.9

5.0

60

4

89.2

29

NEI9004:S28

73

177

84

4.6

2.7

3.7

0.6

8.7

18

37

27.6

30

NEI9008:S17c

76

161

78

5.3

1.7

3.2

0.7

7.0

24

34

35.8

31

NS1:S08

75

196

2

8.2

2.3

3.8

0.5

7.7

29

26

42.9

32

SCROGP3:N14

73

218

5

8.2

2.2

3.3

0.7

7.3

40

13

59.4

33

UR05071:S04

71

191

95

8.5

2.0

3.7

0.6

6.0

35

17

52.9

34

UR05071:S0409

70

184

80

1.0

2.3

4.2

0.7

7.3

27

31

40.3

35

UR10001:S18

73

174

66

30.5

2.2

4.0

0.7

11.7

17

38

25.4

36

UR11003:S17b

70

187

80

7.1

2.5

4.0

1.0

6.7

52

10

78.3

37

UR11003:S17h

68

161

70

9.8

2.0

4.0

0.8

10.3

31

23

46.7

38

UR13010:N0613

70

184

73

12.5

2.0

3.8

0.8

10.0

54

8

80.8

39

UR13085:N0204

70

185

84

3.2

2.0

3.7

0.8

7.7

55

7

82.0

40

UR13085:N0207

71

148

47

7.3

2.0

3.3

0.5

9.0

21

35

31.4

41

UR13088:S0604

70

187

88

9.1

2.3

4.3

1.0

7.3

42

11

62.3

42

P34K77

71

202

94

0.0

2.2

3.5

1.1

7.7

60

3

89.8

43

P3223

75

191

83

12.5

1.8

3.7

0.9

7.7

78

1

116.8

44

Garst 8285

75

193

79

11.1

1.7

3.7

1.0

7.3

63

2

93.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CK mean

74

195

86

7.9

1.9

3.6

1.0

7.6

67

 

 

 

Mean

72

180

82

10.0

2.2

3.7

0.7

8.8

36

 

 

 

CV%

2

10

17

99.9

15.2

9.0

17.5

26.7

29

 

 

 

LSD 0.05

3

30

22

16.2

0.5

0.5

0.2

3.8

17

 

 

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Table 3. Days to pollen shedding (DTP), plant height (PHT, cm), ear height (EHT), root lodging (RTL) stay green rating on August 3 and 22 (SG803 and SG822), ears per plant (EARPP),  grain mold (%), and yield (YBU, bu/a) of GEM breeding crosses under V-10 drought stress in Lubbock, TX in 2005.

ENO

Entry

PHT

EHT

RTL

SG803

SG822

EARPP

MOLD

YBU

Y-R

% CK

1

AR13026:N08a04

210

98

5.5

2.3

3.2

0.8

7.0

67

5

83.3

2

AR13026:N08c06

198

94

2.2

1.7

3.5

0.9

8.0

57

9

70.8

3

AR13026:S15

185

90

8.9

2.3

3.7

0.6

8.0

27

35

34.0

4

AR13035:S11b01

187

85

6.6

1.7

3.0

0.7

7.0

36

28

45.3

5

AR16021:S08b

198

78

0.0

2.0

3.8

0.8

6.3

54

12

67.9

6

AR16021:S08a01

205

106

2.0

1.8

3.8

0.7

7.7

33

31

41.3

7

AR16021:S08b09

171

75

0.0

2.2

4.0

0.7

7.0

39

25

48.4

8

AR16026:N1210

193

89

12.0

1.7

2.7

0.9

12.7

44

19

54.3

9

AR16026:S1716

183

77

1.1

2.0

3.8

0.7

6.0

48

14

59.3

10

AR16035:S0209

170

86

2.0

2.0

4.3

0.8

8.7

40

24

50.1

11

AR17026:N1019

178

86

3.9

1.8

3.3

0.7

16.0

31

32

38.5

12

AR17056:N13

186

68

13.3

2.7

3.7

0.6

6.3

41

23

50.7

13

AR17056:S12

195

96

11.4

2.3

3.5

0.6

7.0

36

27

45.4

14

AR17056:S1216

189

87

3.3

2.0

4.0

0.8

7.0

46

17

57.1

15

AR17056:S19

198

101

1.2

2.0

3.7

0.7

8.3

47

15

58.6

16

BR51721:N2012

178

92

9.8

1.8

3.3

0.9

7.3

66

6

82.0

18

CH04030:N0301

184

73

3.8

1.5

3.3

0.9

11.0

56

10

69.5

19

CH05015:F27

176

91

4.3

1.7

2.8

0.8

10.0

46

16

57.3

20

CHIS740:S14

238

120

9.2

2.0

3.0

0.6

7.0

17

40

20.8

21

CML247:N17c

175

80

2.5

3.0

3.8

0.3

6.7

10

41

12.8

23

CUBA117:S1542

190

84

5.1

1.7

3.7

0.6

8.0

30

33

37.3

24

CUBA164:S11c

202

102

3.2

1.8

3.2

0.7

6.7

42

21

52.3

25

DK888:S08b

203

114

4.4

2.2

3.3

0.7

7.7

17

39

21.0

26

FS8A(T):N1804

192

83

0.0

1.8

3.7

0.7

8.7

41

22

51.7

28

GUAT209:N11c

199

100

0.0

2.0

3.3

0.9

5.3

48

13

59.8

29

NEI9004:S28

184

92

0.0

2.2

4.0

0.6

7.3

28

34

34.9

30

NEI9008:S17c

158

69

2.0

1.5

2.7

0.6

8.0

25

36

31.7

31

NS1:S08

179

94

0.0

1.8

3.2

0.8

6.0

55

11

69.2

32

SCROGP3:N14

193

105

6.8

2.0

2.6

0.9

6.3

45

18

56.1

33

UR05071:S04

196

97

3.7

2.3

3.3

0.7

5.3

42

20

52.4

34

UR05071:S0409

169

67

5.1

2.5

4.3

0.7

8.7

24

37

30.0

35

UR10001:S18

166

73

0.0

2.2

4.0

0.6

9.3

23

38

28.8

36

UR11003:S17b

193

105

0.0

2.2

3.5

1.0

5.7

69

4

86.0

37

UR11003:S17h

204

90

4.8

1.8

4.3

0.8

6.3

39

26

48.1

38

UR13010:N0613

200

82

1.4

1.7

3.5

0.9

7.0

62

7

77.0

39

UR13085:N0204

177

82

3.0

1.8

3.2

0.8

6.0

61

8

76.1

40

UR13085:N0207

180

75

7.8

2.3

3.7

0.8

8.0

34

30

42.1

41

UR13088:S0604

186

85

2.2

2.3

4.2

0.9

6.3

36

29

44.9

42

P34K77

192

78

0.0

1.8

3.0

0.9

8.3

75

2

93.5

43

P3223

199

108

22.7

1.7

3.0

0.9

6.7

71

3

88.4

44

Garst 8285

214

103

4.4

1.7

3.2

0.9

7.0

95

1

118.0

 

 

 

 

 

 

 

 

 

 

 

 

 

CK Mean

202

96

9.0

1.7

3.1

0.9

7.3

80

 

 

 

Mean

190

89

4.4

2.0

3.5

0.8

7.7

44

 

 

 

CV%

7

14

138.3

19.8

11.1

18.2

25.1

26

 

 

 

LSD 0.05

21

20

9.9

0.6

6.3

0.2

3.1

19

 

 

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Table 4. Means of days to pollen shedding (DTP), husk rating (Husk), plant height (PHT, cm), ear height (EHT), root lodging (RTL) stay green rating (SG822), CEW ear penetration (CEW, cm), ear length (EL, cm), grain mold (%), and yield (YBU, bu/a) of GEM breeding crosses under well-irrigated condition in Lubbock TX in 2004 and 2005.

ENO

Entry

DTP

Husk

PHT

EHT

CEW

EL

Ratio

SG822

MOLD

YBU

Y-R

% CK

Note 1

Note2

1

AR13026:N08a04

66

2.8

249

99

7.9

21

38

2.9

5.8

141.8

14

79.7

Y-D/LK

LE

2

AR13026:N08c06

65

3.0

229

87

8.6

22

40

3.4

5.0

125.0

26

70.3

Y-MK

LE

3

AR13026:S15

69

3.8

229

100

7.0

19

36

2.6

3.5

113.3

33

63.7

Y-F/LK

LE

4

AR13035:S11b01

67

3.4

239

99

7.8

20

40

2.3

4.3

130.6

19

73.4

Y-D/LK

LE,DG,UL

5

AR16021:S08b

67

3.3

224

90

7.8

20

38

2.5

5.0

136.2

17

76.6

Y-D/MK

DG, LE

6

AR16021:S08a01

69

3.0

234

101

7.5

19

38

2.5

4.2

124.5

27

70.0

Y-D/MK

LE

7

AR16021:S08b09

66

2.9

222

81

8.5

20

42

2.8

4.2

112.0

34

63.0

Y-D/MK

 

8

AR16026:N1210

66

2.8

239

96

7.7

21

37

3.0

6.2

143.2

12

80.5

Y-D/LK

DG, lE

9

AR16026:S1716

67

3.1

230

97

7.0

19

37

2.5

3.8

134.7

18

75.7

Y-D/LK

LE,DG

10

AR16035:S0209

66

3.2

222

79

8.6

20

42

2.8

4.3

119.4

30

67.1

Y-D/SK

 

11

AR17026:N1019

68

2.9

217

84

8.3

22

38

2.7

4.2

111.3

37

62.6

Y-D/LK

 

12

AR17056:N13

65

3.0

229

89

7.9

20

39

2.7

3.5

129.2

21

72.6

Y-D/LK

LE, HS

13

AR17056:S12

66

3.3

248

109

6.8

21

33

2.9

3.5

146.1

11

82.1

Y-F/LK

DG,LE

14

AR17056:S1216

67

3.3

229

84

7.1

19

39

2.7

4.3

126.4

25

71.1

Y-D/MK

 

15

AR17056:S19

66

2.7

237

106

7.7

21

37

2.8

3.8

159.9

6

89.9

Y-D/LK

LE,DG,UL

16

BR51721:N2012

71

3.3

228

102

7.6

21

36

2.6

5.3

141.3

15

79.4

Y-D/LK

DG,LE, UL

17

BR52051:N0417

67

3.3

237

72

6.8

23

30

4.2

1.3

127.0

24

71.4

 

 

18

CH04030:N0301

65

2.7

220

91

8.7

21

41

2.7

7.0

130.4

20

73.3

Y-D/LK

 

19

CH05015:F27

68

3.0

216

95

7.9

20

39

3.0

4.5

116.7

32

65.6

Y-F/LK

LE

20

CHIS740:S14

74

4.0

285

148

6.6

21

32

2.1

5.7

75.2

44

42.3

/LK

HS

21

CML247:N17c

73

3.1

215

94

6.9

18

38

2.5

4.8

85.3

43

48.0

Y-D/LK

HS

22

CML323:N15

68

2.8

217

73

7.7

20

38

4.2

1.7

161.0

5

90.5

 

 

23

CUBA117:S1542

70

3.8

243

98

6.0

18

33

2.6

2.8

120.7

29

67.9

Y-D/LK

DG

24

CUBA164:S11c

70

3.4

255

102

5.8

21

28

2.9

3.0

127.7

22

71.8

Y-D/LK

LE,DG

25

DK888:S08b

74

4.0

243

122

6.6

20

32

2.2

4.3

88.7

42

49.9

Y-D/MK

HS

26

FS8A(T):N1804

69

2.5

223

85

9.1

21

43

2.8

8.2

122.7

28

69.0

Y-D/LK

DG,LE

27

GUAD05:N3215

67

2.8

222

75

6.8

20

34

3.0

2.0

111.7

36

62.8

 

 

28

GUAT209:N11c

70

3.4

253

111

5.3

19

28

3.1

2.3

142.4

13

80.0

Y-D/MK

 

29

NEI9004:S28

70

3.9

231

97

7.0

18

39

2.3

4.2

106.7

40

60.0

Y-D/MK

DG,LE

30

NEI9008:S17c

73

3.1

221

80

6.6

19

35

2.3

4.3

111.9

35

62.9

Y-F/MK

LE,DG,UL

31

NS1:S08

71

3.3

244

100

7.2

21

34

3.0

3.5

157.7

8

88.6

Y-D/LK

LE,DG,UL

32

SCROGP3:N14

73

3.3

251

119

7.2

23

31

2.5

2.7

127.0

23

71.4

Y-D/LK

DG, LK

33

UR05071:S04

69

3.8

251

113

5.4

20

26

3.1

2.7

149.8

10

84.2

Y-D/LK

LE,DG,UL

34

UR05071:S0409

67

3.2

230

79

8.2

20

41

2.8

4.3

117.2

31

65.9

Y-D/LK

DG

35

UR10001:S18

69

3.6

222

89

8.0

18

44

2.7

4.7

109.6

38

61.6

Y-D/LK

LE,DG,UL

36

UR11003:S17b

68

3.4

230

95

6.4

20

32

3.3

3.2

159.6

7

89.7

Y-D/LK

LE,DG

37

UR11003:S17h

65

2.9

225

93

7.5

20

38

3.0

3.5

100.3

41

56.4

Y-D/LK

LE,DG

38

UR13010:N0613

66

3.1

234

86

6.8

22

31

2.9

4.2

162.3

4

91.2

Y-D/LK

LE, DG

39

UR13085:N0204

67

3.0

233

95

8.6

21

40

3.1

5.7

155.8

9

87.6

Y-D/LK

 

40

UR13085:N0207

67

3.0

216

82

7.6

20

37

2.8

5.3

108.1

39

60.8

Y-D/MK

 

41

UR13088:S0604

67

3.3

223

89

6.5

18

35

2.9

3.2

136.6

16

76.8

Y-D/LK

LE,DG

42

P34K77

66

3.5

239

88

6.9

20

35

3.1

3.2

177.7

2

99.9

Y-D/LK

DG

43

P3223

73

3.1

240

104

6.4

19

34

3.1

3.2

183.5

1

103.2

Y-D/LK

LE,DG

44

Garst 8285

71

4.0

243

97

7.7

22

36

3.3

2.7

172.5

3

97.0

Y-D/LK

 

 

CK Mean

70

3.5

241

96

7.0

20

35

3.1

3.0

177.9

 

100.0

 

 

 

Mean

68

3.2

234

96

7.3

20

36

2.8

4.2

130.4

 

 

 

 

 

CV%

2

15.0

6

16

15.1

4

15

14.9

46.4

13.7

 

 

 

 

 

LSD 0.05

2

0.8

24

24

1.8

1

9

0.7

ns

28.8

 

 

 

 

Note: HUSK = husk rating on a 1 to 5 scale with 1 being loose and 5 tightly and well covered, CEW = corn earworm penetration measured on 10 ears in cm.  MOLD = percentage of molded kernels; Y-R = yield ranking, LK= large kernels, LK = large kernel, LE =long ear, DG = dark green leaf, HS = heat susceptible, stay green rating was scored on a 1 to 5 scale with 1= 100% green and 5 = 0% green.

Back to Top

Table 5. Means of stay green rating on August 22 (SG822), ears per plant (EARPP), and yield (YBU, bu/a) of GEM breeding crosses under two drought stress conditions in Lubbock, TX in 2004 and 2005.

ENO

Inventory

Entry

SG822

SG822

EARPP

EARPP

YBU

YBU

Y-R

Y-R

% CK

% CK

 

 

 

V10

50ET

V10

50ET

V10

50ET

V10

50ET

V10

50ET

1

95GEM80189

AR13026:N08a04

2.8

3.0

0.9

0.8

87.6

77.7

6

8

82.0

74.1

2

96GEM80070

AR13026:N08c06

3.2

3.8

0.9

0.8

77.2

63.1

10

19

72.3

60.1

3

98GEM80094

AR13026:S15

3.5

4.0

0.6

0.7

31.6

45.8

39

33

29.6

43.6

4

95GEM80080

AR13035:S11b01

3.1

3.6

0.8

0.8

52.2

56.7

22

23

48.8

54.1

5

00GEM80051

AR16021:S08b

3.6

3.7

0.8

0.8

58.3

68.3

19

15

54.5

65.1

6

95GEM80313

AR16021:S08a01

3.6

3.8

0.7

0.8

49.0

55.4

31

24

45.8

52.8

7

95GEM80317

AR16021:S08b09

3.8

3.8

0.8

0.8

49.3

45.9

29

32

46.2

43.7

8

95GEM80098

AR16026:N1210

2.5

2.9

0.8

0.8

69.6

71.5

13

13

65.2

68.2

9

95GEM80099

AR16026:S1716

3.6

3.8

0.8

0.9

62.4

62.7

17

20

58.4

59.7

10

95GEM80448

AR16035:S0209

4.2

4.1

0.8

0.7

48.7

48.4

32

30

45.6

46.2

11

95GEM80084

AR17026:N1019

3.2

3.4

0.9

0.9

51.1

51.1

26

29

47.9

48.7

12

99GEM80122

AR17056:N13

3.5

3.8

0.7

0.8

51.3

60.7

25

21

48.0

57.9

13

95GEM80010

AR17056:S12

3.4

3.5

0.7

0.9

48.2

70.2

33

14

45.2

67.0

14

95GEM80086

AR17056:S1216

3.7

4.0

0.8

0.9

60.6

65.5

18

17

56.8

62.4

15

96GEM80036

AR17056:S19

3.6

3.7

0.8

0.8

63.1

68.2

16

16

59.1

65.0

16

02GEM80044

BR51721:N2012

3.1

3.3

0.9

0.9

73.5

83.0

12

7

68.8

79.1

17

95GEM80433

BR52051:N0417

2.7

3.3

1.1

1.0

87.6

98.3

5

5

82.1

93.7

18

98GEM80080

CH04030:N0301

3.0

3.6

0.9

0.9

73.8

59.1

11

22

69.1

56.3

19

02GEM80060

CH05015:F27

2.7

2.9

0.8

0.9

50.6

55.2

27

25

47.4

52.6

20

02GEM80014

CHIS740:S14

2.5

2.8

0.7

0.5

25.7

12.6

41

44

24.1

12.0

21

02GEM80007

CML247:N17c

3.7

3.8

0.5

0.5

25.6

18.3

42

42

24.0

17.5

22

98GEM80010

CML323:N15

2.7

3.0

1.4

0.9

92.3

99.2

4

4

86.4

94.5

23

02GEM80068

CUBA117:S1542

3.7

3.4

0.6

0.7

29.9

32.6

40

41

28.0

31.1

24

02GEM80072

CUBA164:S11c

2.8

3.3

0.9

0.8

52.0

43.3

23

36

48.7

41.3

25

96GEM80084

DK888:S08b

3.3

3.0

0.7

0.5

14.2

18.1

44

43

13.3

17.2

26

95GEM80117

FS8A(T):N1804

3.1

3.4

0.8

0.9

68.7

64.3

14

18

64.3

61.3

27

99GEM80096

GUAD05:N3215

2.8

3.2

0.9

0.8

53.7

74.7

21

12

50.3

71.2

28

02GEM80070

GUAT209:N11c

3.0

3.8

1.0

0.9

64.0

75.6

15

11

60.0

72.1

29

03GEM80027

NEI9004:S28

3.5

3.5

0.6

0.7

33.9

33.1

38

40

31.7

31.6

30

02GEM80010

NEI9008:S17c

2.6

2.9

0.8

0.9

34.0

43.8

37

35

31.8

41.7

31

00GEM80030

NS1:S08

2.9

3.8

0.9

0.6

51.6

41.6

24

38

48.3

39.7

32

95GEM80045

SCROGP3:N14

2.6

3.1

1.0

0.7

57.5

53.2

20

27

53.8

50.7

33

95GEM80014

UR05071:S04

3.4

3.3

0.8

0.7

42.2

51.5

34

28

39.5

49.1

34

95GEM80101

UR05071:S0409

3.9

4.1

0.7

0.7

34.6

42.3

36

37

32.4

40.3

35

00GEM80040

UR10001:S18

3.9

3.7

0.5

0.7

24.5

34.3

43

39

23.0

32.7

36

00GEM80085

UR11003:S17b

3.3

3.7

1.0

1.0

85.1

77.5

7

9

79.6

73.9

37

00GEM80091

UR11003:S17h

4.1

3.9

1.0

0.9

50.3

46.4

28

31

47.1

44.2

38

95GEM80215

UR13010:N0613

3.1

3.6

1.0

0.9

83.1

77.2

8

10

77.8

73.6

39

95GEM80103

UR13085:N0204

2.8

3.2

1.0

0.9

82.9

99.2

9

3

77.6

94.6

40

00GEM80074

UR13085:N0207

3.3

3.4

0.8

0.7

38.5

45.6

35

34

36.0

43.5

41

95GEM80108

UR13088:S0604

4.0

4.3

0.8

0.9

49.0

53.5

30

26

45.9

51.0

42

P34K77

P34K77

2.7

3.2

0.9

1.0

100.6

96.8

3

6

94.2

92.3

43

P3223

P3223

2.7

3.3

1.0

1.0

111.6

116.1

1

1

104.5

110.7

44

Garst 8285

Garst 8285

2.8

3.3

1.1

1.1

108.3

101.8

2

2

101.4

97.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CK Mean

2.7

3.3

1.0

1.0

106.8

104.9

 

 

100.0

100.0

 

 

Mean

3.2

3.5

0.8

0.8

57.5

59.4

 

 

 

 

 

 

CV%

12.6

11.6

21.0

18.4

22.4

28.5

 

 

 

 

 

 

LSD 0.05

0.6

0.7

0.3

0.2

20.9

27.4

 

 

 

 

 

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Contact us | Home | USDA | ARS | NCRPIS | ISU | Corn Breeding | January 27, 2006