Natural allelic diversity in OsDREB1F gene in the Indian wild rice germplasm led to ascertain its association with drought tolerance

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• 作者：Bikram Pratap Singh ; Pawan Kumar Jayaswal ; Balwant Singh…
• 关键词：Drought tolerance ; Haplotypes ; Nucleotide diversity ; SNP ; Wild rice
• 刊名：Plant Cell Reports
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：34
• 期：6
• 页码：993-1004
• 全文大小：1,990 KB
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• 作者单位：Bikram Pratap Singh (1) (2)
  Pawan Kumar Jayaswal (1)
  Balwant Singh (1)
  Pankaj Kumar Singh (1)
  Vinod Kumar (1)
  Shefali Mishra (1)
  Nisha Singh (1)
  Kabita Panda (1)
  Nagendra Kumar Singh (1)
  
  1. National Research Center on Plant Biotechnology, IARI, New Delhi, 110012, India
  2. Banasthali University, Tonk, Rajasthan, India
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Cell Biology
  Plant Sciences
  Biotechnology
  Plant Biochemistry
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1432-203X

文摘

Key message Three coding SNPs and one haplotype identified in the OsDREB1F gene have potential to be associated with drought tolerance in rice. Abstract Drought is a serious constraint to rice production worldwide,?that can be addressed by deployment of drought tolerant genes. OsDREB1F, one of the most potent drought tolerance transcription activator genes, was re-sequenced for allele mining and association study in a set of 136 wild rice accessions and four cultivated rice. This analysis led to identify 22 SNPs with eight haplotypes based on allelic variations in the accessions used. The nucleotide variation-based neutrality tests suggested that the OsDREB1F gene has been subjected to purifying selection in the studied set of rice germplasm. Six different OsDREB1F protein variants were identified on the basis of translated amino acid residues amongst the orthologues. Five protein variants were truncated due to deletions in coding region and found susceptible to drought stress. Association study revealed that three coding SNPs of this gene were significantly associated with drought tolerance. One OsDREB1F variant in the activation domain of OsDREB1F gene which led to conversion of aspartate amino acid to glutamate was found to be associated with drought tolerance. Three-dimensional homology modeling assisted to understand the functional significance of this identified potential allele for drought tolerance in rice. The natural allelic variants mined in the OsDREB1F gene can be further used in translational genomics for improving the water use efficiency in rice.