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Changes in Six Different Opaque‐2 Genotypes of Zea mays L. During Successive Generations of Backcrossing 1
Author(s) -
Feist W. A.,
Lambert R. J.
Publication year - 1970
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/cropsci1970.0011183x001000060016x
Subject(s) - backcrossing , biology , zea mays , inbred strain , opacity , genotype , genetics , gene , agronomy , physics , optics
Changes during backcrossing of six inbred lines of Zea mays for grams lysine per 100 g of protein and seed weight reduction during conversion to opaque ‐2 were measured. Linear and quadratic regression coefficients were calculated for response of grams lysine per 100 protein. Although differences were found in the lines studied, the changes obtained were gradual and could not be attributed to interaction of the opaque ‐2 gene with one or a few genes from the recurrent parents. The changes were probably due to genetically controlled differences that occur in the protein fractions of the kernel with backcrossing. These changes may enhance or reduce the effects of the opaque ‐2 gene in different recurrent parent genotypes. The percent reduction in seed weight of opaque ‐2 plants did not differ statistically among inbred backgrounds nor generations of backcrossing.