http://oar.icrisat.org/id/eprint/7379 2014-01-25T14:03:56Z info:eu-repo/semantics/descriptiveMetadata http://oar.icrisat.org/7379/ Improvement of two traditional Basmati rice varieties for bacterial blight resistance and plant stature through morphological and marker-assisted selection Pandey, M K Shobha Rani, N Sundaram, R M Laha, G S Madhav, M S Srinivasa Rao, K Sudharshan, I Hari, Y Varaprasad, G S Subba Rao, L V Suneetha, K Sivaranjani, A K P Viraktamath, B C Genetics and Genomics Agriculture-Farming, Production, Technology, Economics Bacterial blight (BB) is a major production threat to Basmati, the aromatic rice prized for its unique quality. In order to improve the BB resistance of two elite, traditional BB-susceptible Basmati varieties (Taraori Basmati and Basmati 386), we utilized the strategy of limited marker-assisted backcrossing for introgression of two major BB resistance genes, Xa21 and xa13, coupled with phenotype-based selection for improvement of their plant type and yield. Improved Samba Mahsuri, an elite high-yielding, fine-grain-type BB-resistant rice variety served as donor for BB resistance. Backcross-derived improved Basmati lines at BC1F5 possessing a single resistance gene (i.e. either Xa21 or xa13) displayed moderate resistance to BB, while lines possessing both Xa21 and xa13 showed significantly higher levels of resistance. Two-gene pyramid lines (Xa21 + xa13) possessing good grain and cooking quality similar to their respective traditional Basmati parents, short plant stature (<110 cm plant height) and higher grain yield than the recurrent parent(s) were identified and advanced. This work demonstrates the successful application of marker-assisted selection in conjunction with phenotype-based selection for targeted introgression of multiple resistance genes into traditional Basmati varieties along with improvement of their plant stature and yield. Springer Netherlands 2013 Article PeerReviewed application/pdf en http://oar.icrisat.org/7379/1/MolBreeding_31_239-246_2013.pdf Pandey, M K and Shobha Rani, N and Sundaram, R M and Laha, G S and Madhav, M S and Srinivasa Rao, K and Sudharshan, I and Hari, Y and Varaprasad, G S and Subba Rao, L V and Suneetha, K and Sivaranjani, A K P and Viraktamath, B C (2013) Improvement of two traditional Basmati rice varieties for bacterial blight resistance and plant stature through morphological and marker-assisted selection. Molecular Breeding, 31 (1). pp. 239-246. ISSN 1572-9788 http://dx.doi.org/10.1007/s11032-012-9779-7 info:eu-repo/semantics/objectFile info:eu-repo/semantics/humanStartPage