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. 2024 May 30;13(11):1509.
doi: 10.3390/plants13111509.

Quantitative Trait Locus Mapping for Plant Height and Branch Number in CCRI70 Recombinant Inbred Line Population of Upland Cotton (Gossypium hirsutum)

Gangling Li  1   2 , Jincan Che  1   2   3 , Juwu Gong  2 , Li Duan  2   4 , Zhen Zhang  2 , Xiao Jiang  2 , Peng Xu  2 , Senmiao Fan  2 , Wankui Gong  2 , Yuzhen Shi  2 , Aiying Liu  2 , Junwen Li  2 , Pengtao Li  2 , Jingtao Pan  2 , Xiaoying Deng  2 , Youlu Yuan  1   2 , Haihong Shang  1   2
Affiliations

Quantitative Trait Locus Mapping for Plant Height and Branch Number in CCRI70 Recombinant Inbred Line Population of Upland Cotton (Gossypium hirsutum)

Gangling Li et al. Plants (Basel). .

Abstract

Upland cotton accounts for a high percentage (95%) of the world's cotton production. Plant height (PH) and branch number (BN) are two important agronomic traits that have an impact on improving the level of cotton mechanical harvesting and cotton yield. In this research, a recombinant inbred line (RIL) population with 250 lines developed from the variety CCRI70 was used for constructing a high-density genetic map and identification of quantitative trait locus (QTL). The results showed that the map harbored 8298 single nucleotide polymorphism (SNP) markers, spanning a total distance of 4876.70 centimorgans (cMs). A total of 69 QTLs for PH (9 stable) and 63 for BN (11 stable) were identified and only one for PH was reported in previous studies. The QTLs for PH and BN harbored 495 and 446 genes, respectively. Combining the annotation information, expression patterns and previous studies of these genes, six genes could be considered as potential candidate genes for PH and BN. The results could be helpful for cotton researchers to better understand the genetic mechanism of PH and BN development, as well as provide valuable genetic resources for cotton breeders to manipulate cotton plant architecture to meet future demands.

Keywords: branch number; candidate gene; high-density genetic map; plant height; quantitative trait locus; upland cotton.

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Conflict of interest statement

The authors declare no conflicts of interest.

Figures

Figure 1
Figure 1
PH approximate normal distribution analysis.
Figure 2
Figure 2
BN approximate normal distribution analysis.
Figure 3
Figure 3
Positions of stable QTLs in plant height and branch number. (A) Positions of stable QTLs in plant height. (B) Positions of stable QTLs in branch number.
Figure 4
Figure 4
GO and KEGG analysis of the potential candidate genes. (a) GO analysis of the potential candidate genes for PH. (b) GO analysis of the potential candidate genes for BN shows terms containing at least 10 genes. (c) KEGG analysis of the potential candidate genes for PH. (d) KEGG analysis of the potential candidate genes for BN.
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