Genetic variance components and genetic effects among eleven diverse upland cotton lines and their F2 hybrids |
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Authors: | Johnie N. Jenkins,Jack C. McCarty Suffix" >Jr.,Jixiang Wu,Osman A. Gutierrez |
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Affiliation: | (1) Crop Science Research Laboratory, USDA, ARS, P. O. Box 5367, Mississippi State, MS 39762, USA;(2) Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762, USA |
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Abstract: | Selecting high yielding upland cotton, Gossypium hirsutum L. lines with improved fiber quality is a primary breeding goal. A diverse set of ten cultivars and one breeding line were crossed in a half diallel. Parents and F2 hybrids were grown in three environments at Mississippi State, MS. Ten agronomic and fiber traits were analyzed by a mixed linear model approach based on the additive-dominance genetic model. Variance component, genetic effects and genetic correlations were calculated. ‘Acala Ultima’ was a desirable general combiner for fiber length, uniformity, strength, micronaire, lint percentage, and boll weight. ‘FiberMax 966’ was a desirable general combiner for fiber length, uniformity, strength, and all agronomic traits. ‘Tamcot Pyramid’ and M240 were poor general combiners for both fiber and agronomic traits. ‘Coker 315’ was a good general combiner for fiber length, uniformity, micronaire, boll weight, boll number, and yield. Heterozygous dominance effects were associated with several crosses, which suggest their use as hybrids. |
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Keywords: | Hybrids Cotton Gossypium hirsutum Breeding Genetics Genetic variances |
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