Assessment of genotype × environment interactions for yield and fiber quality in cotton performance trials |
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Authors: | B T Campbell M A Jones |
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Affiliation: | (1) Coastal Plains Soil, Water, and Plant Research Center, USDA-ARS, Florence, SC 29501, USA;(2) Pee Dee Research and Education Center, Clemson University, Florence, SC 29506, USA |
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Abstract: | Plant breeding programs involving a wide range of crop plants routinely practice selection (directly or indirectly) for genotypes
that display stability for a given trait or set of traits across testing environments through the genotype evaluation process.
Genotype stability for trait performance is a direct measure of the presence and effect of genotype × environment interactions,
which result from the differential performance of a genotype or cultivar across environments. The genotype evaluation process
also requires selection of the proper field trial locations that best represent the target environments the breeding program
is directed toward. In this study, we assessed the extent to which genotype × environment interactions affected agronomic
performance (lint yield, gin turnout) and fiber quality (fiber length, fiber strength, uniformity index, micronaire, fiber
elongation) in a series of cotton (Gossypium hirsutum) performance trials in 12 location–year environments in South Carolina. Genotype × environment interactions affecting lint
yield were larger in higher yielding environments, while interactions for fiber strength were greater for genotypes with lower
mean fiber strength values. Two regions within the South Carolina cotton production areas were identified as proper testing
locations for lint yield performance, while testing for fiber strength can be accomplished in any location within the statewide
cotton production areas.
The U.S. Government's right to retain a non-exclusive, royalty-free license in and to any copyright is acknowledged. |
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Keywords: | cotton fiber quality genotype × environment interaction lint yield stability |
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