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Genetic Variation Within Cotton For Seed N and Amino Acid Content 1
Author(s) -
Meredith William R.,
Elmore C. D.,
King E. E.
Publication year - 1978
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/cropsci1978.0011183x001800040013x
Subject(s) - biology , amino acid , cultivar , glycine , genetic variability , lysine , genetic variation , genotype , leucine , alanine , phenylalanine , gossypium , threonine , interspecific competition , histidine , horticulture , botany , genetics , serine , gene , phosphorylation
The objective of this study was to investigate the genetic variability for seed N and amino acid content among currently available cottons ( Gossypium hirsutum L.). In 1974 and 1975, 35 cultivars and strains were grown in two replications at Stoneville, Miss. Significant genetic variability was detected for N and eight amino acids in dehulled cottonseed. Seed N ranged from 5.0% for ‘Delfos 9169’ to 6.1% for ‘Q 1 ’. Significant genotype ✕ year interactions were detected for lysine, histidine, and phenylalanine. Significant phenotypic correlations of N with lysine, threonine, glycine, alanine, and leucine were –0.36, –0.85, –0.66, –0.72, and –0.64 respectively. Genotypic correlations were generally of the same sign and magnitude as the phenotypic correlations. Results of the study indicated a modest amount of genetic variability within G. hirsutum for N and amino acid content. Old cultivars and new strains originating from interspecific hybridizations appeared to be the most promising sources for useful breeding material. There were little differences in N and amino acid contents among the commonly used cultivars regardless of their geographic use patterns.