NDLI: Mapping quantitative trait loci associated with soybean resistance to common cutworm and soybean compensatory growth after defoliation using SNP marker-based genome-wide association analysis

Content Provider	Springer Nature Link
Author	Wang, Hui Yan, Honglang Du, Haiping Chao, Maoni Gao, Zhongjie Yu, Deyue
Copyright Year	2015
Abstract	Resistance and tolerance are different plant defense mechanisms against herbivores. In this study, four compensatory growth (tolerance) indexes—the ratios of treatment to control for plant height (RPH), branching number of the stem (RBN), seed number per plant (RSN), and seed weight per plant (RSW)—and three resistance indexes—larval weight (LW), pupal weight (PW), and larva-consumed leaf weight (LCL)—were used to evaluate soybean (Glycine max (L.) Merr) defense against common cutworm (CCW; Spodoptera litura Fabricius). The phenotypic variations of seven traits among 170 accessions were significant (ANOVA, P < 0.01). Five of the seven traits had a large variation (>20 %) in this population. The decay distance of linkage disequilibrium was approximately 639 kb on average in intrachromosomal regions. Approximately 80 % of the intervals between two neighboring single-nucleotide polymorphisms were less than 600 kb. The natural population was divided into two subpopulations with little population structure. The genetic relationship among the accessions was distant. Fifty-one quantitative trait loci (QTLs) were significantly associated with the seven traits: six for RPH, nine for RBN, seven for RSN/RSW, one for RBN/RSN/RSW, six for LW, nineteen for LCL, and three for PW (−Log P ≥ 2.00, P ≤ 0.01). Single QTLs contributed 2.8–11 % of the phenotypic variance. Three QTLs were co-associated with soybean resistance and compensatory growth at the 0.05 significant level. Of these three QTLs, the qSCCW18-3 located in the promoter sequence of the soybean Rubisco activase β subunit gene (GmRCAβ) and its resistance allele reduced LW and increased plant height.
Starting Page	1
Ending Page	15
Page Count	15
File Format	PDF
ISSN	13803743
Journal	Molecular Breeding
Volume Number	35
Issue Number	8
e-ISSN	15729788
Language	English
Publisher	Springer Netherlands
Publisher Date	2015-08-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Association analysis Common cutworm Compensatory growth Insect resistance Rubisco activase Soybean Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Molecular Biology Biotechnology Agronomy and Crop Science

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