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Title:   Author  item
                                            WU, JIXIANG - MISSISSIPPI STATE UNIVitem
                                            Jenkins, Johnieitem
                                            McCarty, Jackitem
                                            THAXTON, PEGGY - MISSISSIPPI STATE UNIV
  Submitted to: Euphytica
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 1/25/2009
                                    Publication  Date: 4/1/2009
                                    Citation: Wu, J., Jenkins, J.N., McCarty Jr., J.C., Thaxton, P. 2009. Seed trait evaluation of Gossypium barbadense L. chromosomes/arms in a G. hirsutum L. background. Euphytica. 167:371-380.Interpretive Summary: Investigation of cotton seed nutritional components is important because seeds provide an important nutritional profile and possibly serve as a biofuel resource. In this study, we evaluated five cultivars, 13 cotton chromosome substitution (CS-B) lines, their donor parent, ‘3-79’, and their recurrent parent, ‘TM-1’, for seed traits over four environments. Results showed that genotypic effects were more important than genotype by environment interaction effects for seed index, embryo percentage, oil percentage, and oil index. Chromosome associations with these seed traits were detected using the comparative method by comparing the differences between each CS-B line and TM-1. Results also showed that seed index was highly correlated with protein index, oil index, and fiber index. Lint percentage, boll number, and lint yield were positively correlated with protein percentage while negatively correlated with seed index and oil index. Seed index, fiber percentage, protein index, oil index, and fiber index showed negative correlations with micronaire but positive correlations with fiber length and strength. Our results suggested that agronomic traits and seed nutrition contents can be improved simultaneously while improving seed traits and will also result in the improvement of fiber quality.
                                Technical Abstract: Investigation of cotton seed nutritional components is important because seeds provide an important nutritional profile and possibly serve as a biofuel resource. In this study, we evaluated five cultivars, 13 cotton chromosome substitution (CS-B) lines, their donor parent, ‘3-79’, and their recurrent parent, ‘TM-1’, for seed traits over four environments. A mixed linear model approach with the jackknife method was employed to estimate variance components and to predict genotypic effects for each seed trait. Results showed that genotypic effects were an important contributor to the phenotypic variances for all seed traits and genotype by environment interaction effects were significant for seed index, embryo percentage, oil percentage, and oil index. Chromosome associations with these seed traits were detected using the comparative method by comparing the differences between each CS-B line and TM-1. Results showed that seed index was highly correlated with protein index, oil index, and fiber index. Lint percentage, boll number, and lint yield were positively correlated with protein percentage while negatively correlated with seed index and oil index. Seed index, fiber percentage, protein index, oil index, and fiber index showed negative correlations with micronaire but positive correlations with fiber length and strength. Thus, the results suggested that agronomic traits and seed nutrition contents can be improved simultaneously while improving seed traits and will also result in the improvement of fiber traits when these materials are used.


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