棉纤维发育基因在无纤维雷蒙德氏棉基因组中的分布与进化

Distribution and evolution of cotton fiber development genes in the fibreless Gossypium raimondii genome.

作者信息

Xu Zhanyou, Yu Jing, Kohel Russell J, Percy Richard G, Beavis William D, Main Dorrie, Yu John Z

机构信息

USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA; Bioinformatics and Computational Biology, Iowa State University, Ames, IA, USA.

USDA-ARS, Southern Plains Agricultural Research Center, College Station, TX, USA; Department of Horticulture, Washington State University, Pullman, WA, USA.

出版信息

Genomics. 2015 Jul;106(1):61-9. doi: 10.1016/j.ygeno.2015.03.002. Epub 2015 Mar 18.

DOI:10.1016/j.ygeno.2015.03.002

PMID:25796538

Abstract

Cotton fiber represents the largest single cell in plants and they serve as models to study cell development. This study investigated the distribution and evolution of fiber Unigenes anchored to recombination hotspots between tetraploid cotton (Gossypium hirsutum) At and Dt subgenomes, and within a parental diploid cotton (Gossypium raimondii) D genome. Comparative analysis of At vs D and Dt vs D showed that 1) the D genome provides many fiber genes after its merger with another parental diploid cotton (Gossypium arboreum) A genome although the D genome itself does not produce any spinnable fiber; 2) similarity of fiber genes is higher between At vs D than between Dt vs D genomic hotspots. This is the first report that fiber genes have higher similarity between At and D than between Dt and D. The finding provides new insights into cotton genomic regions that would facilitate genetic improvement of natural fiber properties.

摘要

棉纤维是植物中最大的单细胞，可作为研究细胞发育的模型。本研究调查了四倍体棉花（陆地棉）At和Dt亚基因组之间以及亲本二倍体棉花（雷蒙德氏棉）D基因组内锚定在重组热点上的纤维单基因的分布和进化。At与D以及Dt与D的比较分析表明：1）尽管D基因组本身不产生任何可纺纤维，但它与另一个亲本二倍体棉花（亚洲棉）A基因组合并后提供了许多纤维基因；2）At与D之间的纤维基因相似性高于Dt与D基因组热点之间的相似性。这是首次报道纤维基因在At和D之间的相似性高于Dt和D之间的相似性。这一发现为棉花基因组区域提供了新的见解，将有助于天然纤维特性的遗传改良。