群体基因组学分析揭示了具有顶端优势的快速生长泡桐品种的选育足迹

IF 4.3 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Guo-Le Qin , Chuan-Ming Fu , Fan Tang , Jian Yin , De-Long Guan , Chen-Yu Shi
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引用次数: 0

摘要

泡桐是一种具有生态和经济价值的树种,因其生长迅速、木材质量高而被广泛栽培。为了提高泡桐种质资源的质量,我们培育出了具有生长速度和顶端优势专利优势的优良品种 QingT。为了阐明 QingT 优良性状的遗传基础,我们利用群体比较基因组学分析了 QingT 和普通泡桐之间的基因组变异模式。我们对30个QingT样本和30个普通样本进行了全基因组重测序,检测到1560万个SNP和260万个indels。系统发育和种群结构分析将普通泡桐和青桐有力地划分为不同的群体,这表明基因组稳定度很高。与普通泡桐相比,青桐的杂合度和连锁不平衡衰减都有所降低,这反映了高重组,表明与普通白花蛇舌草的杂交效应是其专利优势的来源。基因组选择扫描发现 25 个区域的 169 个基因的核苷酸多样性较高,表明组间存在选择横扫。对横扫基因的功能分析显示,QingT 的核糖体、生物合成和生长途径上调,这意味着其快速生长表型中蛋白质生产和发育过程的增强。这项研究的洞察力全面描绘了泡桐育种过程中的基因组变异,定位了调控农艺性状的候选基因座,为未来提高生产力的分子育种工作奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Population genomics analysis reveals footprints of selective breeding in a rapid-growth variety of Paulownia fortunei with apical dominance

Paulownia fortunei is an ecologically and economically valuable tree cultivated for its rapid growth and high-quality timber. To enhance Paulownia germplasm, we have developed the elite variety QingT with patented advantages in growth rate and apical dominance. To illuminate the genetic basis of QingT's superior traits, here we harness comparative population genomics to analyze genomic variation patterns between QingT and common Paulownia. We performed whole-genome re-sequencing of 30 QingT and 30 common samples, detecting 15.6 million SNPs and 2.6 million indels. Phylogeny and population structure analyses robustly partitioned common and QingT into distinct groups which indicate robust genome stabilization. QingT exhibited reduced heterozygosity and linkage disequilibrium decay compared to common Paulownia, reflecting high recombination, indicating hybridizing effects with common white-flowered string is the source of its patented advantages. Genome selection scans uncovered 25 regions of 169 genes with elevated nucleotide diversity, indicating selection sweeps among groups. Functional analysis of sweep genes revealed upregulation of ribosomal, biosynthesis, and growth pathways in QingT, implicating enhanced protein production and developmental processes in its rapid growth phenotype. This study's insights comprehensively chart genomic variation during Paulownia breeding, localizing candidate loci governing agronomic traits, and underpinnings of future molecular breeding efforts to boost productivity.

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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
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