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Quantitative Trait Locus Analysis for Deep-Sowing Germination Ability in the Maize IBM Syn10 DH Population

文献类型： 外文期刊

作者： Liu, Hongjun 1 ; Zhang, Lin 2 ; Wang, Jiechen 3 ; Li, Changsheng 4 ; Zeng, Xing 2 ; Xie, Shupeng 5 ; Zhang, Yongzhong; 1 ;

作者机构： 1.Shandong Agr Univ, Coll Life Sci, State Key Lab Crop Biol, Shandong Key Lab Crop Biol, Tai An, Shandong, Peoples R China

2.Northeast Agr Univ, Dept Agron, Harbin, Peoples R China

3.Chinese Acad Sci, Shanghai Inst Biol Sci, Inst Plant Physiol & Ecol, Natl Key Lab Plant Mol Genet, Shanghai, Peoples R China

4.Shenyang Agr Univ, Dept Agron, Shenyang, Peoples R China

5.Heilongjiang Acad Agr Sci, Suihua Subacad, Suihua, Peoples R China

6.Shandong Agr Univ, Dept Plant Genet & Breeding, Coll Agron Sci, Tai An, Shandong, Peoples R China

7.Sichuan Agr Univ, Maize Res Inst, Key Lab Biol & Genet Improvement Maize Southwest, Chengdu, Peoples R China

8.Iowa State Univ, Dept Agron, Ames, IA USA

9.China Agr Univ, Dept Plant Genet Breeding & Seed Sci, Beijing, Peoples R China

10.Zhejiang Agr & Forestry Univ, Coll Agr & Food Sci, Key Lab Qual Improvement Agr Prod Zhejiang Prov, Linan, Peoples R C

关键词： quantitative trait locus;deep-sowing;germination ability;maize;IBM Syn10 DH population

期刊名称：FRONTIERS IN PLANT SCIENCE （ 影响因子：5.753； 五年影响因子：6.612 ）

ISSN： 1664-462X

年卷期： 2017 年 8 卷

页码：

收录情况： SCI

摘要： Deep-sowing is an effective measure to ensure seeds absorbing water from deep soil layer and emerging normally in arid and semiarid regions. However, existing varieties demonstrate poor germination ability in deep soil layer and some key quantitative trait loci (QTL) or genes related to deep-sowing germination ability remain to be identified and analyzed. In this study, a high-resolution genetic map based on 280 lines of the intermated B73 x Mo17 (IBM) Syn10 doubled haploid (DH) population which comprised 6618 bin markers was used for the QTL analysis of deep-sowing germination related traits. The results showed significant differences in germination related traits under deep-sowing condition (12.5 cm) and standard-germination condition (2 cm) between two parental lines. In total, 8, 11, 13, 15, and 18 QTL for germination rate, seedling length, mesocotyl length, plumule length, and coleoptile length were detected for the two sowing conditions, respectively. These QTL explained 2.51-7.8% of the phenotypic variance with LOD scores ranging from 2.52 to 7.13. Additionally, 32 overlapping QTL formed 11 QTL clusters on all chromosomes except for chromosome 8, indicating the minor effect genes have a pleiotropic role in regulating various traits. Furthermore, we identified six candidate genes related to deep-sowing germination ability, which were co-located in the cluster regions. The results provide a basis for molecular marker assisted breeding and functional study in deep-sowing germination ability of maize.

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