| dc.description.abstract | Fiber quality and yield improvement are crucial for cotton domestication and breeding.
With the transformation in spinning techniques and multiplicity needs, the development of cotton
fiber quality and yield is of great importance. A genetic map of 5178 Single Nucleotide Polymorphism
(SNP) markers were generated using 277 F2:3 population, from an intra-specific cross between
two upland cotton accessions, CCRI35 a high fiber quality as female and Nan Dan Ba Di Da Hua
(NH), with good yield properties as male parent. The map spanned 4768.098 cM with an average
distance of 0.92 cM. A total of 110 Quantitative Traits Loci (QTLs) were identified for 11 traits,
but only 30 QTLs were consistent in at least two environments. The highest percentage of phenotypic
variance explained by a single QTL was 15.45%. Two major cluster regions were found, cluster 1
(chromosome17-D03) and cluster 2 (chromosome26-D12). Five candidate genes were identified in the
two QTL cluster regions. Based on GO functional annotation, all the genes were highly correlated with
fiber development, with functions such as protein kinase and phosphorylation. The five genes were
associated with various fiber traits as follows: Gh_D03G0889 linked to qFM-D03_cb, Gh_D12G0093,
Gh_D12G0410, Gh_D12G0435 associated with qFS-D12_cb and Gh_D12G0969 linked to qFY-D12_cb.
Further structural annotation and fine mapping is needed to determine the specific role played by
the five identified genes in fiber quality and yield related pathway. | en_US |
