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Diallel Analysis of Stalk Quality Traits in Twelve Inbred Lines of Maize 1
Author(s) -
Loesch P. J.
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/cropsci1972.0011183x001200030001x
Subject(s) - stalk , diallel cross , biology , hybrid , trait , inbred strain , selection (genetic algorithm) , zoology , agronomy , horticulture , genetics , gene , computer science , programming language , artificial intelligence
Sixty‐six inter se F 1 crosses among 12 inbred lines of corn ( Zea mays L.) were evaluated in two years at two locations. The inheritance of eight stalk traits was determined by means of diallel analysis. Significant differences among the 66 F 1 hybrids were obtained in each trait. General combining ability (gca) and specific combining ability (sca) mean squares were statistically significant nearly every instance. The gca mean square was usually much larger than the sea mean square. Genotypic correlation coefficients between large stalk diameter and crushing strength, weight of stalk and crushing strength, and rind thickness and crushing strength were .72, .88, and .60, respectively. Weight of stalk section appears to be well suited for rapid screening purposes, whereas stalk density appears to be a poor trait to employ in a selection program. for the material studied, selection for high crushing strength will likely result, on the average, in strains characterized by increased size of stalk, weight of stalk, and thickness of rind. Selection procedures recommended for populations involving the lines tested were those which are effective in utilizing both the additive and nonadditive genetic variability.