QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China

doi:10.1016/j.cj.2016.06.009

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	QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China
	Zhu Jifeng 1; Wu Jing 1; Wang Lanfen 1; Blair Matthew W 2; Zhu Zhendong 1; Wang Shumin 1
刊名	The Crop Journal
	2016
卷号	4 期号:5 页码:344-352
关键词	Common bean (Phaseolus vulgaris L.) Common bacterial blight Quantitative trait locus Days after inoculation
ISSN号	2095-5421
DOI	10.1016/j.cj.2016.06.009
英文摘要	Common bacterial blight(CBB), caused by Xanthomonas axonopodis pv. phaseoli and Xanthomonas fuscans subsp. fuscans(Xff), is a worldwide disease of common bean(Phaseolus vulgaris L.). Longyundou 5, a Chinese cultivar in the Mesoamerican gene pool of common bean, displays resistance to the Xff strain XSC3-1. To identify the geneticmechanisms behind this resistance, we crossed Long 5 with a susceptible genotype to develop a mapping population of F_2 plants. Plant resistance to CBBwas identified at 14 and 21 days after inoculation with Xff strain XSC3-1. A major QTL at 14 and 21 days after inoculation was mapped on chromosome Pv10 with LOD scores of 6.41 and 5.35, respectively. This locus was associated with SAP6, a previouslyidentified andmuch-used dominantmarker, but in a 4.2 cMinterval between new codominant markers BMp10s174 and BMp10s244. Ten candidate genes were found between markers BMp10s174 and BMp10s244 on chromosome Pv10 and could encode defense response proteins responding to CBB pathogens. Four pairs each of epistatic QTL for CBB resistance were detected at 14 and 21 days after inoculation. Phenotypic variation explained by the epistatic QTL ranged from7.19%to 12.15%and 7.72%to 8.80%at 14 and 21 days after inoculation, respectively. These results confirmed the importance of epistasis in CBB resistance in common bean. The adjacent markers found may be more efficient for marker assisted selection in common bean breeding for CBB resistance owing to their closer linkage to the target QTL.
学科主题	植物保护
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/101659]
专题	作物科学研究所
作者单位	1.Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081 2.Department of Agriculture & 3.Environment, Tennessee State University, USA, Nashville
推荐引用方式 GB/T 7714	Zhu Jifeng,Wu Jing,Wang Lanfen,et al. QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China[J]. The Crop Journal,2016,4(5):344-352.
APA	Zhu Jifeng,Wu Jing,Wang Lanfen,Blair Matthew W,Zhu Zhendong,&Wang Shumin.(2016).QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China.The Crop Journal,4(5),344-352.
MLA	Zhu Jifeng,et al."QTL and candidate genes associated with common bacterial blight resistance in the common bean cultivar Longyundou 5 from China".The Crop Journal 4.5(2016):344-352.