Use of fiber and fuzz mutants to detect QTL for yield components, seed, and fiber traits of upland cotton
2010
An, Chuanfu | Jenkins, Johnie N. | Wu, Jixiang | Guo, Yufang | McCarty, Jack C.
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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