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Combining Ability for Yield, Protein, and Lysine in an Incomplete Diallel of Sorghum bicolor (L.) Moench 1
Author(s) -
Collins F. C.,
Pickett R. C.
Publication year - 1972
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/cropsci1972.0011183x001200010002x
Subject(s) - diallel cross , lysine , hybrid , heterosis , biology , sorghum , grain yield , yield (engineering) , agronomy , biochemistry , amino acid , materials science , metallurgy
Estimates of general and specific combining ability for grain yield and protein and lysine levels in the grain were obtained by evaluating the performance of 48 F l sorghum hybrids which were derived from crossing 12 restorer lines unto 4 male sterile testers. Significant differences among restorer lines were found in general combining ability for yield, protein, and lysine while significant differences among the male sterile testers existed for yield and protein. The variation due to specific combining ability was not significant for any of the characters. Hetercsis for yield was exhibited by most of the hybrids while only four hybrids demonstrated heterosis for percentage protein and no hybrids were superior to either parent for percentage lysine. Percentage protein was negatively correlated with yield and percentage lysine and levels of lysine was not significantly related to yield. However, the degree of these associations was not strong enough to prevent incorporating high levels of protein and lysine into high yielding lines if simultaneous selection was performed for all three characters.