Improvement of two traditional Basmati rice varieties for bacterial blight resistance and plant stature through morphological and marker-assisted selection

Autor: Maganti Sheshu Madhav, Gouri Sankar Laha, N. Shobha Rani, Kota Suneetha, B. C. Viraktamath, G. S. Varaprasad, LV Subba Rao, Y. Hari, A. K. P. Sivaranjani, K. Srinivasa Rao, Raman Meenakshi Sundaram, Injey Sudharshan, Manish K. Pandey
Rok vydání: 2012
Předmět:
Zdroj: Molecular Breeding. 31:239-246
ISSN: 1572-9788
1380-3743
DOI: 10.1007/s11032-012-9779-7
Popis: 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 (
Databáze: OpenAIRE
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