The genetic architecture of floral traits in the woody plant Prunus mume.

The genetic architecture of floral traits in the woody plant Prunus mume.
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木本植物梅花性状的遗传结构

DOI:
10.1038/s41467-018-04093-z
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发表时间:
2018-04-27
影响因子:
16.6
通讯作者:
Cheng T
Cheng T
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Zhang Q;Zhang H;Sun L;Fan G;Ye M;Jiang L;Liu X;Ma K;Shi C;Bao F;Guan R;Han Y;Fu Y;Pan H;Chen Z;Li L;Wang J;Lv M;Zheng T;Yuan C;Zhou Y;Lee SM;Yan X;Xu X;Wu R;Chen W;Cheng T

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梅(Prunus mume)是一种观赏木本植物,在东亚已经驯化了数千年。花部性状的高度多样性,沿着其最新的基因组序列,使梅成为研究木本植物进化的理想模式系统。本研究以348份梅树和3个李属植物为材料,对351份梅树花部性状进行了重测序,平均测序深度为19.3× 10 ~(-1)。梅树种质资源中存在高度混合的群体结构和来自李属物种的渐渗。通过全基因组关联研究(GWAS),我们确定了显著的数量性状位点(QTL)和基因组区域,其中MYB 108等基因与花瓣颜色、柱头颜色、花萼颜色和花蕾颜色正相关。这项研究的结果揭示了开花植物,特别是木本植物驯化的遗传基础。
Mei (Prunus mume) is an ornamental woody plant that has been domesticated in East Asia for thousands of years. High diversity in floral traits, along with its recent genome sequence, makes mei an ideal model system for studying the evolution of woody plants. Here, we investigate the genetic architecture of floral traits in mei and its domestication history by sampling and resequencing a total of 351 samples including 348 mei accessions and three other Prunus species at an average sequencing depth of 19.3×. Highly-admixed population structure and introgression from Prunus species are identified in mei accessions. Through a genome-wide association study (GWAS), we identify significant quantitative traits locus (QTLs) and genomic regions where several genes, such as MYB108, are positively associated with petal color, stigma color, calyx color, and bud color. Results from this study shed light on the genetic basis of domestication in flowering plants, particularly woody plants.
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