Quantitative trait locus analysis and construction of consensus genetic map for foliar disease resistance based on two recombinant inbred line populations in cultivated groundnut (Arachis hypogaea L.)

• DOI: 10.1007/s11032-011-9661-z
• Publication Date: 2011-11-21T10:17:34Z
• Authors: V. Sujay; M. V. C. Gowda; M. K. Pandey; R. S. Bhat; Y. P. Khedikar; H. L. Nadaf; B. Gautami; C. Sarvamangala; S. Lingaraju; T. Radhakrishan; S. J. Knapp; R. K. Varshney
• Keywords: Genetic linkage; Inbred strain; Rust (programming language); Family-based QTL mapping; Arachis hypogaea

Late leaf spot (LLS) and rust have the greatest impact on yield losses worldwide in groundnut (Arachis hypogaea L.). With objective of identifying tightly linked markers to these diseases, a total 3,097 simple sequence repeats (SSRs) were screened parents two recombinant inbred line (RIL) populations, namely TAG 24 × GPBD 4 (RIL-4) TG 26 (RIL-5), segregation data obtained for 209 marker loci each mapping populations. Linkage map analysis resulted 188 181 RIL-4 RIL-5 respectively. Using 143 common maps, consensus with 225 SSR distance 1,152.9 cM was developed. Comprehensive quantitative trait locus (QTL) detected 28 QTL LLS 15 rust. A major LLS, QTL(LLS)01 (GM1573/GM1009-pPGPseq8D09), 10.27-62.34% phenotypic variance explained (PVE) all six environments population. In case resistance, addition IPAHM103 identified earlier, four new (GM2009, GM1536, GM2301 GM2079) showed significant association (82.96% PVE). Localization 42 candidate genomic regions conferring resistance One region present linkage group AhXV contained three (up 67.98% PVE) 82.96% The second up 62.34% PVE LLS. Molecular associated can be deployed molecular breeding developing varieties enhanced foliar diseases. ELECTRONIC SUPPLEMENTARY MATERIAL: online version this article (doi:10.1007/s11032-011-9661-z) contains supplementary material, which is available authorized users.