TABLE OF CONTENTS

I. FOREWORD ........................................................................................................................1

II. ANNOUNCEMENTS .........................................................................................................2

III. USDA SOYBEAN GERMPLASM COLLECTION REPORT ...........................................5

IV. SOYBEAN GENETICS COMMITTEE REPORT .............................................................6

V. RESEARCH NOTES

        Canada

        Tolerance/resistance to soybean mosaic virus. R. I. Buzzell .................................................9

        Soybean cultivar response to manganese. R. I. Buzzell and W. I. Findlay ..........................10

        India

        Dry matter in yield and branching ability as selection parameters in soybean.
        K. Singh and H. H. Ram ..................................................................................................13

        United States

        Cyst nematode screening methods, indexes and their uses. K. D. Beatty, R. D. Riggs,
        D. Widick, C. E. Caviness, I. L. Eldridge, R. Hancock and J. Davis .................................17

        Variation in water-absorbing capacity of soybean seeds. L. Ragus and H. H. Hadley .........21

        Studies in polyploidy in soybeans: A simple and effective colchicine technique of
        chromosome doubling for soybean (Glycine max (L.) Merr.) and its wild relatives.
        S. H. Cheng and H. H. Hadley .........................................................................................23

        Studies in polyploidy in soybeans: Cytologically identified tetraploid Glycine max and
        Glycine soja and a preliminary observation on seed yields of tetraploid 'Williams' plants.
        S. H. Cheng and H. H. Hadley .........................................................................................24

        Evaluation of chlorophyll-retention near-isogenic lines of soybeans. R. F. Caro and
        H. H. Hadley ...................................................................................................................26

        Mutagenesis of soybeans. S. A. Ryan and J. E. Harper ....................................................29

        Selection and inheritance of nitrate reductase mutants in soybeans. S. A. Ryan,
        R. S. Nelson and J. E. Harper .........................................................................................33

        Genes y₉ and y₁₁ for similar chlorophyll deficiencies prove to be non-allelic.
        R. L. Bernard, R. G. Palmer and B. P. Giles ....................................................................35

        Locating wm on linkage group 8. K. Sadanaga ................................................................39

        Four additional lines showing nonfluorescent roots. R. G. Palmer,
        X. Delannay and S. Broich ...............................................................................................41

        Fr₁ and fr₁ near-isogenic lines. R. G. Palmer, S. L. Broich and X. Delannay .....................43

        Trisomic inheritance of a chimera in soybean. K. E. Newhouse, L. Hawkins,
        R. G. Palmer ....................................................................................................................44

        Insect population dynamics in relation to soybean narrow and broad leaf isolines.
        P. Wells, R. B. Dadson, J. M. Joshi and L. Murphy ..........................................................50
 
        Tactics for management of soybean pest complexes: Potential of entomopathogens
        and commercial microbial insecticides for suppression of the silver-spotted skipper
        soybean pest. C. B. Brooks ..............................................................................................51

        Harvest index of selected soybean germplasm. R. B. Dadson, J. Joshi,
        P. Wells and L. Murphy ....................................................................................................52

        Estimates of variation and heritability for nodule mass and recovery of
        Rhizobium japonicum strain 110. R. R. Greder, J. H. Orf and J. W. Lambert ...................55

        Effect of seed production environment on genetic differences in cold tolerance
        during germination. D. W. Unander, J. W. Lambert and J. H. Orf ......................................59

        Screening for cyst nematode resistance in soybean breeding. S. C. Anand,
        G. S. Brar and K. Gallo ....................................................................................................63

        Inheritance of soybean electrophoretic variants. M. B. Gorman, Y. T. Kiang,
        R. C. Palmer and Y. C. Chiang .........................................................................................67

        Implications of seed set on ms₂ ms₂ male-sterile plants in Raleigh. T. E. Carter,
        J. W. Burton and E. B. Huie ..............................................................................................85

        Seed set on G. falcata and a proposal to use ms₂ male sterility in its hybridization with
        G. max. J. M. Anderson, T. E. Carter, B. A. Martin and J. W. Burton ...............................87

        Inheritance of fatty acid composition in soybean seed oil. B. A. Martin, B. F. Carver,
        J. W. Burton and R. F. Wilson ..........................................................................................89

        Influence of maturity date on the oil content of soybeans with genetically altered
        fatty acid composition. B. F. Carver, J. W. Burton and R. F. Wilson ..................................93

        Midwest soybean rhizobotanical survey. R. W. Zobel ........................................................96

        A new gene for peanut mottle virus resistance in soybean. G. R. Buss,
        C. W. Roane and S. A. Tolin ..........................................................................................102

        Inheritance of a male-sterile mutant from irradiated Essex soybeans. G. R. Buss ...............104

        The T270H chlorotic mutant: Inheritance and linkage analysis. D. M. Stelly and
        R. G. Palmer ..................................................................................................................109

        U.S.S.R.

        Resistance of soybean cultivars and plant introductions to damage by soybean borer.
        V. I. Sichkar, 0. A. Grikun, V. N. Lobko and V. F. Marj'ushkin .....................................117

        Activity of trypsin and chymotrypsin inhibitors of soybean forms with different
        resistance to soybean borer. V. I. Sichkar, A. P. Levitsky, 0. A. Grikun,
        V. N. Lobko and V. F. Marj'ushkin ..............................................................................123

VI. ADDENDUM: Evaluation of soybean genetic stock collection from south and
        southeast Asia in Himalayan midhills. N. D. Rana, L. Singh and G. Chand ......................126

VII. AUTHOR INDEX ........................................................................................................132

VIII. RECENT SOYBEAN GENETICS AND BREEDING PUBLICATIONS ..................133

IX. MAILING LIST ............................................................................................................150

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