Dissection of two quantitative trait loci with pleiotropic effects on plant height and spike length linked in coupling phase on the short arm of chromosome 2D of common wheat (Triticum aestivum L.)

被引：43

作者：

Chai, Lingling ^{[1
,2
]}

Chen, Zhaoyan ^{[1
,2
]}

Bian, Ruolin ^{[1
,2
]}

Zhai, Huijie ^{[3
]}

Cheng, Xuejiao ^{[1
,2
]}

Peng, Huiru ^{[1
,2
]}

Yao, Yingyin ^{[1
,2
]}

Hu, Zhaorong ^{[1
,2
]}

Xin, Mingming ^{[1
,2
]}

Guo, Weilong ^{[1
,2
]}

Sun, Qixin ^{[1
,2
]}

Zhao, Aiju ^{[4
]}

Ni, Zhongfu ^{[1
,2
]}

机构：

[1] China Agr Univ, State Key Lab Agrobiotechnol, Key Lab Crop Heterosis & Utilizat, Minist Educ,Key Lab Crop Genet Improvement, Beijing 100193, Peoples R China

[2] Natl Plant Gene Res Ctr, Beijing 100193, Peoples R China

[3] Henan Agr Univ, Coll Agron, Zhengzhou 450002, Henan, Peoples R China

[4] Hebei Acad Agr, Inst Cereal & Oil Crops, Forestry Sci, Hebei Crop Genet Breeding Lab, Shijiazhuang 050035, Hebei, Peoples R China

来源：

THEORETICAL AND APPLIED GENETICS | 2018年 / 131卷 / 12期

基金：

中国国家自然科学基金;

关键词：

DWARFING GENE RHT8; INTERNATIONAL BREEDING PROGRAMS; MOLECULAR MARKERS; HEXAPLOID WHEAT; REDUCED HEIGHT; BREAD WHEAT; ALLELIC VARIATION; RICE; LINKAGE; EPIGENETICS;

D O I：

10.1007/s00122-018-3177-4

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Key messageTwo QTL with pleiotropic effects on plant height and spike length linked in coupling phase on chromosome 2DS were dissected, and diagnostic marker for each QTL was developed.AbstractPlant height (PHT) is a crucial trait related to plant architecture and yield potential, and dissection of its underlying genetic basis would help to improve the efficiency of designed breeding in wheat. Here, two quantitative trait loci (QTL) linked in coupling phase on the short arm of chromosome 2D with pleiotropic effects on PHT and spike length, QPht/Sl.cau-2D.1 and QPht/Sl.cau-2D.2, were separated and characterized. QPht/Sl.cau-2D.1 is a novel QTL located between SNP makers BS00022234_51 and BobWhite_rep_c63957_1472. QPht/Sl.cau-2D.2 is mapped between two SSR markers, SSR-2062 and Xgwm484, which are located on the same genomic interval as Rht8. Moreover, the diagnostic marker tightly linked with each QTL was developed for the haplotype analysis using diverse panels of wheat accessions. The frequency of the height-reduced allele of QPht/Sl.cau-2D.1 is much lower than that of QPht/Sl.cau-2D.2, suggesting that this novel QTL may be an attractive target for genetic improvement. Consistent with a previous study of Rht8, a significant difference in cell length was observed between the NILs of QPht/Sl.cau-2D.2. By contrast, there was no difference in cell length between NILs of QPht/Sl.cau-2D.1, indicating that the underlying molecular mechanism for these two QTL may be different. Collectively, these data provide a new example of QTL dissection, and the developed diagnostic markers will be useful in marker-assisted pyramiding of QPht/Sl.cau-2D.1 and/or QPht/Sl.cau-2D.2 with the other genes in wheat breeding.

引用

页码：2621 / 2637

页数：17

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