Genetic diversity and evolution of the plastome in allotetraploid cotton ( Gossypium spp.)

作者：Xin‐Lin Yan, Shenglong Kan, Meixia Wang, Yongyao Li, Luke R. Tembrock, Wenchuang He, Liyun Nie, Guanjing Hu, Daojun Yuan, Xiongfeng Ma, Zhiqiang Wu · 发表于：Journal of Systematics and Evolution · 年份：2024 · DOI：10.1111/jse.13070 · 被引用次数：24 · 研究领域：Research in Cotton Cultivation、Plant and Fungal Interactions Research、Plant Virus Research Studies

Abstract Cotton ( Gossypium spp.) is a vital global source of renewable fiber and ranks among the world's most important cash crops. While extensive nuclear genomic data of Gossypium has been explored, the organellar genomic resources of allotetraploid cotton, remain largely untapped at the population level. The plastid genome (plastome) is well suited for studying plant species relationships and diversity due to its nonrecombinant uniparental inheritance. Here, we conducted de novo assembly of 336 Gossypium plastomes, mainly from domesticated cultivars, and generated a pan‐plastome level resource for population structure and genetic diversity analyses. The assembled plastomes exhibited a typical quadripartite structure and varied in length from 160 103 to 160 597 bp. At the species level, seven allotetraploid species were resolved into three clades, where Gossypium tomentosum and Gossypium mustelinum formed an early diverging clade rooted by diploids, followed by splitting two sister clades of Gossypium darwinii – Gossypium barbadense and Gossypium hirsutum – Gossypium ekmanianum – Gossypium stephensii . Within the G. hirsutum clade the resolution of cultivated accessions was less polyphyletic with landrace and wild accessions than in G. barbadense suggesting some selection on plastome in the domestication of this adaptable species of cotton. The nucleotide diversity of G. hirsutum was higher than that of G. barbadense . We specifically compared the plastomes of G. hirsutum ...