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Early Generation Testing of Diallel Crosses of Soybeans 1
Author(s) -
Leffel R. C.,
Hanson W. D.
Publication year - 1961
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1961.0011183x000100030005x
Subject(s) - diallel cross , geneticist , agricultural experiment station , library science , biology , agriculture , agronomy , ecology , computer science , genetics , hybrid
EARLY-GENERATION testing of progenies from crosses between selected parents has been a subject of considerable study in self-pollinated crops, including soybeans. Recent literature reviews on the topic in selfpollinated species, and specifically soybeans, have been presented by Elliott (1) and Johnson (6), respectively. The most general problem has been concerned with the effectiveness of selection for high yield of seed among and within crosses during the early generations after hybridization. Judicious selection of parents has been an accepted part of the breeding procedure, but little information has been obtained on the relative merits of soybean varieties as parents. Possible explanations for the failure to recognize high yielding progenies in early generations include: (1) Genotype-environment interactions, (2) inadequate testing in time and space, (3) heterosis attributable to epistatic or dominance effects of genes which is not obtained or maintained in pure lines, (4) heterozygosity and heterogeneity of genotypes within progenies, and (5) interplant and interplot competition. The studies reported herein were conducted to determine the value of parental and early generation progeny performance in identifying crosses that would