Development and deployment of a high-density linkage map identified quantitative trait loci for plant height in peanut (Arachis hypogaea L.)

Huang, L and Ren, X and Wu, B and Li, X and Chen, W and Zhou, X and Chen, Y and Pandey, M K and Jiao, Y and Luo, H and Lei, Y and Varshney, R K and Liao, B and Jiang, H (2016) Development and deployment of a high-density linkage map identified quantitative trait loci for plant height in peanut (Arachis hypogaea L.). Scientific Reports, 6 (39478). pp. 1-10. ISSN 2045-2322

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Plant height is one of the most important architecture traits in crop plants. In peanut, the genetic basis of plant height remains ambiguous. In this context, we genotyped a recombinant inbred line (RIL) population with 140 individuals developed from a cross between two peanut varieties varying in plant height, Zhonghua 10 and ICG 12625. Genotyping data was generated for 1,175 SSR and 42 transposon polymorphic markers and a high-density genetic linkage map was constructed with 1,219 mapped loci covering total map length of 2,038.75 cM i.e., accounted for nearly 80% of the peanut genome. Quantitative trait locus (QTL) analysis using genotyping and phenotyping data for three environments identified 8 negative-effect QTLs and 10 positive-effect QTLs for plant height. Among these QTLs, 8 QTLs had a large contribution to plant height that explained ≥10% phenotypic variation. Two major-effect consensus QTLs namely cqPHA4a and cqPHA4b were identified with stable performance across three environments. Further, the allelic recombination of detected QTLs proved the existence of the phenomenon of transgressive segregation for plant height in the RIL population. Therefore, this study not only successfully reported a high-density genetic linkage map of peanut and identified genomic region controlling plant height but also opens opportunities for further gene discovery and molecular breeding for plant height in peanut.

Item Type: Article
Divisions: Research Program : Genetic Gains
Uncontrolled Keywords: QTL, Quantitative trait loci, Plant height, Peanut, Plant architecture, QTL analysis, QTL mapping
Subjects: Mandate crops > Groundnut
Others > Plant Growth
Depositing User: Mr Ramesh K
Date Deposited: 04 May 2017 03:56
Last Modified: 04 May 2017 03:56
Official URL:
Acknowledgement: We thank Dr. Yingjie Xiao for helpful comments to the manuscript. This research was supported by the National Natural Science Foundations of China (31401420, 31271764, 31371662, 31471534 and 31461143022) and the Plant Germplasm Resources Sharing Platform (2015NWB035).
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