Use of fiber and fuzz mutants to detect QTL for yield components,seed, and fiber traits of upland cotton |
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Authors: | Chuanfu An Johnie N Jenkins Jixiang Wu Yufang Guo Jack C McCarty |
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Institution: | (1) Department of Plant and Soil Sciences, Mississippi State University, Mississippi State, MS 39762, USA;(2) USDA-ARS, Crop Science Research Laboratory, P.O. Box 5367, Mississippi State, MS 39762, USA; |
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Abstract: | This research detected QTL or molecular markers associated with yield, fiber, and seed traits within multiple fuzz and fiber
loci genetic backgrounds. Two F2 populations from crosses of MD17, a fuzzless-lintless line containing three fuzzless loci, N
1
, n
2
and a postulated n
3
, with line 181, fuzzless-linted and with FM966, a fuzzy-linted cultivar, were used. QTL explaining 68.3 (population with
FM966) to 87.1% (population with 181) of the phenotypic variation for lint percentage and 62.8% (population with 181) for
lint index were detected in the vicinity of BNL3482-138 on chromosome 26. Single marker regression analyses indicated STV79-108,
on the long arm of chromosome 12 had significant association with lint percentage (R
2 26.7%), lint index (R
2 30.6%), embryo protein percentage (R
2 15.4%) and micronaire (R
2 20.0%). Two-locus epistatic interactions were also observed. Results from this research will facilitate further understanding
the complex mechanisms of yield, fiber, and seed traits of cotton. |
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Keywords: | |
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