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Evaluation of Early Generation Testing in Spring Barley 1
Author(s) -
Smith E. L.,
Lambert J. W.
Publication year - 1968
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/cropsci1968.0011183x000800040029x
Subject(s) - diallel cross , biology , yield (engineering) , statistics , grain yield , predictive value , kernel (algebra) , agronomy , mathematics , zoology , microbiology and biotechnology , horticulture , hybrid , combinatorics , medicine , materials science , metallurgy
An analysis was made of the combining abilities of bulks in F 2 and F 3 diallel crosses among 10 barley parents. There were relatively large and significant variances for general combining ability for seed yield, kernel weight, maturity, and plant height. Ratios of general to specific combining ability indicated that most of the genetic variances was associated with general combining ability for these characters. The predictive value with respect to yield and kernel weight of six of the parents and the early‐generation bulks of their crosses was measured by the performance of F 5 lines derived from the crosses. The performance of parents themselves, of individual crosses in F 2 and F 3 , as well as in the F 2 and F 3 parental arrays were all generally reliable as indications of parental prepotency and the potential value of the crosses, although the predictive value of the F 2 bulks for seed yield was slightly lower than that of the parents and F 3 ďs. The performance of F 1 topcrosses was of limited value for either yield or kernel weight in evaluating parental prepotency.