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Title: Allelic diversity for salt stress responsive candidate genes among Indian rice landraces
Authors: Singh, Deepika
Singh, Balwant
Mishra, Shefali
Singh, Ashok Kumar
Sharma, Tilak Raj
Singh, Nagendra Kumar
Keywords: Allelic diversity;Haplotypes;Indian rice landraces;Salinity tolerance
Issue Date: Jan-2016
Publisher: NISCAIR-CSIR, India
Abstract: Salt stress adversely affects growth and productivity of crops. Rice is one of the most important food crops, which has contributed to the Green Revolution through semi-dwarf, high yielding varieties but these varieties are rated as salt-sensitive. Landraces of rice are known to possess greater genetic variation for the trait and hence are being exploited for enhancing salt tolerance in the high yielding rice varieties. Here we analyzed, allelic diversity of 13 different candidate genes for salt tolerance by targeted re-sequencing in 69 diverse landraces and varieties of rice. Multiple sequence alignment revealed in total 43 SNPs. Nucleotide diversity ranged from 0.00007 to 0.01430, number of haplotypes varies from 1 to 9 and haplotype diversity ranged from 0.000 to 0.350. The SOS1 and SKC1 genes revealed the highest haplotype diversity among the tested genotypes. This haplotype variability may be used for trait-association analysis to identify useful functional markers for enhancing salt stress tolerance in rice through molecular breeding.
Page(s): 25-33
ISSN: 0975-0967 (Online); 0972-5849 (Print)
Appears in Collections:IJBT Vol.15(1) [January 2016]

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