http://oar.icrisat.org/id/eprint/6169 2013-11-06T08:26:52Z info:eu-repo/semantics/descriptiveMetadata http://oar.icrisat.org/6169/ Waterlogging tolerance in pigeonpea (Cajanus cajan (L.) Millsp.): genotypic variability and identification of tolerant genotypes Sultana, R Vales, M I Saxena, K B Rathore, A Rao, S Rao, S K Mula, M G Kumar, R V Pigeonpea Pigeonpea is an important legume crop of the semi-arid tropics. In India, pigeonpea is mostly grown in areas prone to waterlogging, resulting in major production losses. It is imperative to identify genotypes that show tolerance at critical crop growth stages to prevent these losses. A selection of 272 diverse pigeonpea accessions was evaluated for seed submergence tolerance for different durations (0, 120, 144, 168 and 192 h) under in vitro conditions in the laboratory. All genotypes exhibited high (0·79–0·98) survival rates for up to 120 h of submergence. After 192 h of submergence, the hybrids as a group exhibited significantly higher survival rates (0·79) than the germplasm (0·71), elite breeding lines (0·68) and commercial varieties (0·58). Ninety-six genotypes representing the phenotypic variation observed during laboratory screening were further evaluated for waterlogging tolerance at the early seedling stage using pots, and survival rates were recorded for 8 days after completion of the stress treatment. Fortynine of these 96 genotypes, representing the phenotypic variation for waterlogging tolerance, were chosen in order to evaluate their performance under natural field conditions. The following cultivated varieties and hybrids were identified as tolerant after three levels of testing (in vitro, in pots and in the field): ICPH 2431, ICPH 2740, ICPH 2671, ICPH 4187, MAL 9, LRG 30, Maruti, ICPL 20128, ICPL 332, ICPL 20237, ICPL 20238, Asha and MAL 15. These materials can be used as sources of waterlogging tolerance in breeding programmes. Cambridge University Press 2013 Article PeerReviewed application/pdf en http://oar.icrisat.org/6169/7/JAS_Waterlogging_1-26_2013.pdf application/pdf en http://oar.icrisat.org/6169/1/Jrn_Agric_Sci_1-13_2012_Ifirst.pdf Sultana, R and Vales, M I and Saxena, K B and Rathore, A and Rao, S and Rao, S K and Mula, M G and Kumar, R V (2013) Waterlogging tolerance in pigeonpea (Cajanus cajan (L.) Millsp.): genotypic variability and identification of tolerant genotypes. Journal of Agricultural Science, 151 (5). pp. 659-671. ISSN 1469-5146 http://dx.doi.org/10.1017/S0021859612000755 info:eu-repo/semantics/objectFile info:eu-repo/semantics/objectFile info:eu-repo/semantics/humanStartPage