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G3 (Bethesda). 2017 May 5;7(5):1587-1594. doi: 10.1534/g3.117.041517.

Identification of QTLs for 14 Agronomically Important Traits in Setaria italica Based on SNPs Generated from High-Throughput Sequencing.

Zhang K1,2, Fan G3,4,5, Zhang X6,2, Zhao F7,4,5, Wei W7,4,5, Du G6,2, Feng X7,4,5, Wang X7,4,5, Wang F7,4,5, Song G7,4,5, Zou H6,2, Zhang X7,4,5, Li S7,4,5, Ni X6,2, Zhang G1,2, Zhao Z3,4,5.

Author information

1
Beijing Genomics Institute-Shenzhen, 518083, China zhanggengyun@genomics.cn zhaozhihai58@163.com.
2
Beijing Genomics Institute Education Center, University of Chinese Academy of Sciences, Shenzhen 518083, China.
3
Institute of Millet, Zhangjiakou Academy of Agricultural Science, 075032, China zhanggengyun@genomics.cn zhaozhihai58@163.com.
4
Engineering Technology Research Center of Hybrid Millet in Hebei Province, Zhangjiakou 075032, China.
5
National Millet Improvement Center, Zhangjiakou Hybrid Millet Sub Center, 075032, China.
6
Beijing Genomics Institute-Shenzhen, 518083, China.
7
Institute of Millet, Zhangjiakou Academy of Agricultural Science, 075032, China.

Abstract

Foxtail millet (Setaria italica) is an important crop possessing C4 photosynthesis capability. The S. italica genome was de novo sequenced in 2012, but the sequence lacked high-density genetic maps with agronomic and yield trait linkages. In the present study, we resequenced a foxtail millet population of 439 recombinant inbred lines (RILs) and developed high-resolution bin map and high-density SNP markers, which could provide an effective approach for gene identification. A total of 59 QTL for 14 agronomic traits in plants grown under long- and short-day photoperiods were identified. The phenotypic variation explained ranged from 4.9 to 43.94%. In addition, we suggested that there may be segregation distortion on chromosome 6 that is significantly distorted toward Zhang gu. The newly identified QTL will provide a platform for sequence-based research on the S. italica genome, and for molecular marker-assisted breeding.

KEYWORDS:

QTL mapping; SNP map; agronomic traits; foxtail millet; photoperiod

PMID:
28364039
PMCID:
PMC5427501
DOI:
10.1534/g3.117.041517
[Indexed for MEDLINE]
Free PMC Article

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