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Inheritance of High Lysine in Maize 1
Author(s) -
Choe BongHo,
Zubér M. S.,
Krause G. F.,
Hilderbrand E. S.
Publication year - 1976
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/cropsci1976.0011183x001600010009x
Subject(s) - lysine , biology , opacity , selection (genetic algorithm) , inheritance (genetic algorithm) , phenotype , balancing selection , zea mays , genetics , gene , genetic variation , amino acid , agronomy , physics , artificial intelligence , computer science , optics
Two maize ( Zea mays L.) families with high and two with low lysine were selected from the first cycle of Zuber and Helm's recurrent selection experiment in Logan County Composite. Plants from these four families were selfed and crossed to opaque‐2. The level of lysine from the high and low families was transmitted to the testcross F 1 's and to both the normal and opaque phenotypes of the F 2 populations. The results indicate that two genetic systems are involved in lysine synthesis, one associated with the opaque‐2 gene per se and the second operating independently of opaque‐2. Several of the opaque phenotypes from the F 2 's involving the high‐lysine parents had more lysine than the opaque‐ 2 parents. The two genetic systems appeared to complement each other in an additive manner. Although the selection criterion in the recurrent selection for high lysine was only lysine content on a whole kernel basis, the protein level for the'high‐lysine families and their crosses was higher than that for the low‐lysine families. Thus recurrent selection for high lysine resulted in higher levels of protein.