Making the Bread: Insights from Newly Synthesized Allohexaploid Wheat

doi:10.1016/j.molp.2015.02.016

CORC > 中国农业科学院 > 作物科学研究所

	Making the Bread: Insights from Newly Synthesized Allohexaploid Wheat
	Li Aili 1; Geng Shuaifeng 1; Zhang Lianquan 2; Liu Dengcai 2; Mao Long 1
刊名	Molecular Plant
	2015
卷号	8 期号:6 页码:847-859
关键词	allopolyploidy synthetic wheat heterosis adaptation expression level dominance
ISSN号	1674-2052
DOI	10.1016/j.molp.2015.02.016
英文摘要	Breadwheat (or common wheat, Triticum aestivum) is an allohexaploid (AABBDD, 2n = 6x = 42) that arose by hybridization between a cultivated tetraploid wheat T. turgidum(AABB, 2n = 4x = 28) and the wild goatgrass Aegilops tauschii (DD, 2n = 2x = 14). Polyploidization provided niches for rigorous genome modification at cytogenetic, genetic, and epigenetic levels, rendering a broader spread than its progenitors. This review summarizes the latest advances in understanding gene regulation mechanisms in newly synthesized allohexaploid wheat and possible correlation with polyploid growth vigor and adaptation. Cytogenetic studies reveal persistent association of whole-chromosome aneuploidy with nascent allopolyploids, in contrast to the genetic stability in common wheat. Transcriptome analysis of the euploid wheat shows that small RNAs are driving forces for homoeo-allele expression regulation via genetic and epigenetic mechanisms. The ensuing non-additively expressed genes and those with expression level dominance to the respective progenitor may play distinct functions in growth vigor and adaptation in nascent allohexaploid wheat. Further genetic diploidization of allohexaploid wheat is not random. Regional asymmetrical gene distribution, rather than subgenome dominance, is observed in both synthetic and natural allohexaploid wheats. The combinatorial effects of diverged genomes, subsequent selection of specific gene categories, and subgenome-specific traits are essential for the successful establishment of common wheat.
学科主题	植物学
语种	中文
内容类型	期刊论文
源URL	[http://ir.nais.net.cn/handle/2HMLN22E/131310]
专题	作物科学研究所
作者单位	1.Institute of Crop Science, Chinese Academy of Agricultural Sciences, National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing, 100081; 2.Triticeae Research Institute, Sichuan Agricultural University, Sichuan, Chengdu, 611130
推荐引用方式 GB/T 7714	Li Aili,Geng Shuaifeng,Zhang Lianquan,et al. Making the Bread: Insights from Newly Synthesized Allohexaploid Wheat[J]. Molecular Plant,2015,8(6):847-859.
APA	Li Aili,Geng Shuaifeng,Zhang Lianquan,Liu Dengcai,&Mao Long.(2015).Making the Bread: Insights from Newly Synthesized Allohexaploid Wheat.Molecular Plant,8(6),847-859.
MLA	Li Aili,et al."Making the Bread: Insights from Newly Synthesized Allohexaploid Wheat".Molecular Plant 8.6(2015):847-859.