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F 1 Hybrids Versus Random F 5 Line Performance and Estimates of Genetic Effects in Spring Wheat 1
Author(s) -
Busch R. H.,
Lucken K. A.,
Frohberg R. C.
Publication year - 1971
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/cropsci1971.0011183x001100030014x
Subject(s) - hybrid , heterosis , backcrossing , biology , selection (genetic algorithm) , yield (engineering) , genetic distance , line (geometry) , genetic analysis , agronomy , genetic variation , genetics , mathematics , gene , physics , geometry , artificial intelligence , computer science , thermodynamics
Three hard red spring wheat ( Triticum aestivum L.) crosses which had exhibited significant heterosis in a previous study were analyzed genetically by Hayman's generation mean analysis. Approximately 90 random F 3 ‐ derived F 5 lines were used as an agronomic comparison with the F 1 hybrid generation and to determine if the genetic analysis based on parental, F 1 , F 2 , F 3 , F 4 , and backcross selfed generation means were of use in determining the possible results of selection. Results of the genetic analysis indicated that selection of individual plants should be effective for plant height and heading date. Less value was realized from the analysis of the three crosses for yield. F 5 lines which performed significantly better than the F 1 hybrid were found in each cross. One F 1 hybrid failed to exceed the yield of its high parent, but both of the other hybrids were heterotic. F 0 lines, derived from the best‐yielding F 5 lines, and their respective parental F 5 lines performed similarly when grown in the same experiments.