数字农科院2.0

Unveiling the genetic landscape: Exploring the SSR-based genetic architecture and amino acid dissection of Gossypium barbadense and G. darwinii genomes

文献类型： 外文期刊

作者： Allah Ditta;Zhongli Zhou;Muhammad Shehzad;Xiaoyan Cai;Yanchao Xu;Yuqing Hou;Fang Liu;Kunbo Wang;Muhammad K.R. Khan;Kotb A. Attia;Yaser M. Hafez;Arif A. Mohammed;Baohua Wang;Sajid Fiaz;Baohong Zhang

作者机构：

关键词： amino acid;fiber quality;genetic map;genetic variation;interspecific cross;wild cotton

期刊名称： Notulae Botanicae Horti Agrobotanici Cluj-Napoca

ISSN： 0255-965X

年卷期： 2024 年 52 卷 3 期

页码：

收录情况： SCIE（2024版）

摘要： Genetic maps highlight the genome organization and structure but also provide the chance of tagging superior traits for crop improvement through marker-assisted selection. Amino acids are building blocks of proteins and perform crucial function in regulating the signaling of molecules involved in the development and growth of plants. Plant architecture also have an impact on crop productivity. In order to select elite cultivars for breeding and identification of favorable alleles and their functional properties, a deep understanding of genetic architecture and development of genetic map is essential. In present investigation, an interspecific cross of Gossypium barbadense XH-18 × G. darwinii 5–7 was made to develop a genetic map utilizing single sequence repeat markers for the dissection of amino acids involved in genetic architecture of G. barbadense and G. darwinii. We measured chromosomal distribution of 20 amino acids across the whole genome of both species. The map consists of 613 markers spread across all 26 chromosomes, covering 2371.4 cM of cotton genome with an average inter-marker distance of 9.35 cM. The marker number anchored on the chromosomes varied from 5 to 76 with an average of 23.57 on each chromosome. The Dt sub-genome had more markers (83.03%) than the At sub-genome (15.66%). Moreover, the longest chromosome was 143.387 cM, the shortest was 58.430 cM, and the average length was 91.207 cM. The Dt subgenome spans a greater genomic distance than the At subgenome. A sum of 21, 035 genes were discovered, covering the complete genome of G. barbadense; G. darwinii and have been found to be involved in tRNA 3’-trailer cleavage, macromolecule modification, peptide deformylase activity, response to biotic stimulus and defense response. The minimum Glutamic acid (Glu), Histidine (His), and Lysine (Lys) were found on Chr.13 (0.00–17.74), Chr.02 (0.00–8.01), and Chr.06 (0.00–17.97), respectively found through chromosomal amino acid dissection. The genome-wide SSR interspecific genetic map of G. barbadense and G. darwinii is first of its kind, and studying chromosomal distribution of amino acids will set a landmark step to dissect the genome structure of G. darwinii.

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