Genetics of the resistance to powdery mildew disease in mungbean ( Vigna radiata (L.) Wilczek)
- PDF / 506,371 Bytes
- 6 Pages / 609 x 793 pts Page_size
- 63 Downloads / 203 Views
J. Crop Sci. Biotech. 2009 (March) 12 (1) : 37 ~ 42 DOI No. 10.1007/s12892-008-0074-4 RESEARCH ARTICLE
Genetics of the Resistance to Powdery Mildew Disease in Mungbean (Vigna radiata (L.) Wilczek) Waraluk Kasettranan1, Prakit Somta2, Peerasak Srinives2 Center for Agricultural Biotechnology, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand Department of Agronomy, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen, Nakhon Pathom 73140, Thailand
1 2
Received: January 3, 2009 / Accepted: March 20, 2009 Ⓒ Korean Society of Crop Science and Springer 2009
Abstract Powdery mildew disease caused by the fungus Erysiphe polygoni D.C. is an important disease of mungbean. Loss can be more serious if the disease attacks at seedling stage. In this paper, we report genetics of the resistance to powdery mildew disease in mungbean using a recombinant inbred line (RIL) population derived from a cross between the susceptible parent “KPS1” and the resistant parent “VC6468-11-1A”. Five hundred and ninety-two RILs were developed by random descending from 200 F2 plants. The population was evaluated against the fungus in field and greenhouse conditions. The data were analyzed following a nested design for selfpollinating plants to determine genetic heritability of powdery mildew resistance. The severity of the infestation was measured by using disease index (DI) and area under disease progress curve (AUDPC). Both values showed continuous distribution in the RILs. Under field conditions, the narrow-sense heritability of DI and AUDPC were 0.67 and 0.48, respectively. While under greenhouse conditions, the values were 0.68 and 0.62, respectively. The results suggested that the resistance is quantitatively inherited with high heritability and predominantly additive gene action. To develop powdery mildew-resistant mungbean varieties, the plant breeder can select for resistant lines by using standard selection procedures for self-pollinating crops, viz. pedigree selection, bulk selection, early generation testing, and single-seed descent. Key words: mungbean, powdery mildew, Vigna radiata, Erysiphe polygoni, recombinant inbred lines
Introduction Powdery mildew caused by the fungus Erysiphe polygoni D.C. is a common foliar disease of mungbean, particularly in the cool-dry season. The disease epidemic form covers the upper side of leaves with white floury patches. Parts of the leaves later change into brown. Yield losses due to the disease were reported to be 20-40% at the reproductive stages (Fernandez and Shanmugasundaram 1988), but the damage can be more serious when the epidemic starts at the seedling stages (Reddy et al. 1994). Since all recommended mungbean varieties in Thailand are susceptible to the disease, plant breeders are interested in developing resistant varieties through both conventional and/or Peerasak Srinives ( ) E-mail: [email protected] Tel: +6634281267
The Korean Society of Crop Science
marker-assisted breeding. Genetics and variability of resistance to powdery mildew in m
Data Loading...
