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A Yield‐Component Selection Experiment Involving American and Iranian Cultivars of the Common Bean 1
Author(s) -
Sarafi A.
Publication year - 1978
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/cropsci1978.0011183x001800010002x
Subject(s) - phaseolus , biology , heritability , point of delivery , cultivar , dominance (genetics) , yield (engineering) , selection (genetic algorithm) , horticulture , agronomy , botany , gene , genetics , materials science , computer science , metallurgy , artificial intelligence
A cross was made between Iranian and American bean ( Phaseolus vulgaris L.) cultivars. Five percent of the plants having the most pods per plant in the F 2 and F 3 generations were selected for production of F 3 and F 4 lines. Heritability (narrow sense) of yield components was evaluated in F 2 and F 3 populations. Heritability for pods per plant was 29%, for seeds per pod 38 to 42%, and for 100‐seed weight 33 to 37%. The average dominance of genes for all components suggested partial or nearly complete dominance. To determine genetic advance, F 3 and F 4 lines were compared with the mid‐parent for pods per plant, seeds per pod, and 100‐seed weight. The differences between mid‐parent and selected F 4 lines for pods per plant and seeds per pod were significant. Genetic advance for these characters was 30 and 19%, respectively. The results show that heritabillty for yield components in F 2 and F 3 populations is high enough to be useful for selection. Selection is usually made directly for yield. In this particular cross selection was made for pods per plant and promising productive lines with important Iranian marketing characteristics were obtained.