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Variability and Relationships Among Characters in Zea mays L. Synthetics with Improved Protein Quality 1
Author(s) -
Dudley J. W.,
Lambert R. J.,
Alexander D. E.
Publication year - 1971
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/cropsci1971.0011183x001100040014x
Subject(s) - heritability , biology , lysine , zea mays , yield (engineering) , grain yield , zoology , agronomy , genetics , amino acid , materials science , metallurgy
We measured means, genetic variances, heritabilities, and correlations among characters on half‐sib families (ear‐to‐row progenies) from four opaque‐2 ( o 2 ) and two floury‐2 ( f1 2 ) maize ( Zea mays L.) synthetics. Syn. D.O. o 2 and SSSS o 2 were higher in percent lysine (of whole kernel), g lysine/100g protein (g L/100g P), yield, and lysine/plot, but lower in percent protein and kernel density than fl 2 versions of the same synthetics. Genetic variances for all characters except g L/100g P were higher in fl 2 synthetics. Estimates of heritability suggested that improvement in lysine percent would require breeding efforts similar to those necessary to increase yield. Correlations obtained suggest that simultaneous selection for grain yield and percent lysine would be possible, and that increases in percent lysine would result from increases in g L/100g P and not from increased percent protein. Correlations between kernel density and yield were not significant.