摘要
Spelt(Triticum aestivum ssp.spelta)is an important wheat subspecies mainly cultivated in Europe before the 20th century that has contributed to modern wheat breeding as a valuable genetic resource.However,relatively little is known about the origins and maintenance of spelt populations.Here,using resequencing data from 416 worldwide wheat accessions,including representative spelt wheat,we demonstrate that Eu-ropean spelt emerged when primitive hexaploid wheat spread to the west and hybridized with pre-settled domesticated emmer,the putative maternal donor.Genomic introgression regions from domesticated emmer confer spelt’s primitive morphological characters used for species taxonomy,such as tenacious glumes and laterflowering.We propose a haplotype-based"spelt index"to identify spelt-type wheat vari-eties and to quantify utilization of the spelt gene pool in modern wheat cultivars.This study reveals the ge-netic basis for the establishment of the spelt wheat subspecies in a specific ecological niche and the vital role of the spelt gene pool as a unique germplasm resource in modern wheat breeding.
基金
supported by the National Natural Science Foundation of China (31991210)
the National Key Research and Development Program of China (2021YFD1200104)
the Strategic International Science and Technology Innovation Collaboration Project (2020YFE0202300)
the 2115 Talent Development Program of China Agricultural University,the Pinduoduo-China Agricultural University Research Fund (PC2023 B01016)
the China National Postdoctoral Program for Innovative Talents (BX20230414).
作者简介
Yongfa Wang,contributed equally to this article;Zihao Wang,contributed equally to this article;Correspondence:Weilong Guo(guoweilong@cau.edu.cn);Correspondence:Huiru Peng(penghuiru@cau.edu.cn)。
