Journal
MOLECULAR BREEDING
Volume 34, Issue 3, Pages 1497-1506Publisher
SPRINGER
DOI: 10.1007/s11032-014-0133-0
Keywords
Mungbean; MYMIV; MYMV; Yellow mosaic disease (YMD); Yellow mosaic virus (YMV); QTL
Categories
Funding
- World Bank
- Center of Advanced Studies for Agriculture and Food, Institute for Advanced Studies, Kasetsart University under the National Research University Program of Office of the Higher Education Commission, Ministry of Education, Thailand
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Mungbean yellow mosaic India virus (MYMIV) is a major constraint on mungbean production in South and Southeast Asia. The virus belongs to the genus Begomovirus, causing yellow mosaic disease and subsequently yield loss up to 75-100 %. The present study employed F-2 and BC1F1 populations derived from a cross between susceptible (BARImung 1; BM1) and resistant (BARImung 6; BM6) mungbeans to identify quantitative trait loci (QTLs) associated with resistance to MYMIV. Resistance to the virus was evaluated using F-2:3 and BC1F1:2 populations under field conditions in two locations in Bangladesh in 2012. A total of 1,165 simple sequence repeat markers from different legumes were used to detect the polymorphism between BM1 and BM6. Sixty-one polymorphic markers were used to construct a linkage map comprising 11 linkage groups. Composite interval mapping consistently identified two major QTLs, qMYMIV2 on linkage group 2 and qMYMIV7 on linkage group 7, conferring the resistance in both F-2 and BC1F1 populations. qMYMIV2 and qMYMIV7 accounted for 31.42-37.60 and 29.07-47.36 %, respectively, of the disease score variation, depending on populations and locations. At both loci, the resistant alleles were contributed by the parent BM6. qMYMIV2 appeared to be common to a major QTL for MYMIV resistance in mungbean reported previously, while qMYMIV7 is a new QTL for the resistance. The markers linked to the QTLs in this study are useful in marker-assisted breeding for development of mungbean varieties resistant to MYMIV.
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