Exotic Germplasm for Yield Improvement in 2-way and 3-way Soybean Crosses1
- J. C. Thorne and
- W. R. Fehr2
We evaluated homozygous populations froin 2-way adapted × exotic and 3-way (adapted × exotic) × adapted soybean (Glycine max (L.) Merrill) crosses for seed yield. The average yield of our 3-way populations was significantly greater than the 2-way population mean, but differences were not significant in some 2-, 3-way sets. Mean population performance was generally predictable from parental performance, although a masking inhence of genes from the third parent was observed in the 3-way crosses.
Estimates oC genetic variance for 3-way populations generally were larger than for 2-way populations for yield. Transgressive segregation was observed in all populations, but in most 2-, 3-way sets, the 3-way cross produced more of the superior lines for yield than the 2-way cross.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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