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Haplotype analysis of Saltol QTL region in diverse landraces, wild rice and introgression lines of rice (Oryza sativa, L.). Plant Genetic Resources: Characterization and Utilization

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Title Haplotype analysis of Saltol QTL region in diverse landraces, wild rice and introgression lines of rice (Oryza sativa, L.). Plant Genetic Resources: Characterization and Utilization
Not Available
 
Creator Manohara, K. K., Morajkar, S., Shanbagh, Y., Phadte, P and Singh, N. K.
 
Subject coastal salinity, Goa & Karnataka coast, polymorphic information content, simple sequence repeat marker, wild rice
 
Description Not Available
Salt stress is a major abiotic stress affecting the productivity of rice crop worldwide. This study
screened a set of 71 rice genotypes collected from coastal parts of Goa and Karnataka states in
India for seedling stage salinity tolerance to identify genotypes alternative to standard salt-tolerant
donors Pokkali, FL478, etc. Phenotyping for seedling stage tolerance was carried out under micro
plots at an induced salinity of 12 dS/m. For haplotyping, 14 Saltol QTL linked simple sequence
repeat (SSR) markers on chromosome 1 were utilized. On the basis of the response to salt stress,
10 genotypes were found tolerant, 16 moderately tolerant, 29 sensitive and 15 as highly sensitive.
Among the SSR markers, marker RM10871 was the most polymorphic with a polymorphic information
content of 0.90, exhibiting 14 different alleles followed by RM10793 (0.84) and RM3412 (0.80)
with 8 and 7 alleles, respectively. These markers also exhibited high values for the effective number
of alleles (Ne) and gene diversity (I). The haplotype analysis revealed that the allelic constitution of
the Saltol region of 10 tolerant genotypes from our study varied in comparison to the reference tolerant
check FL478. Further, the haplotype of three tolerant genotypes, namely, Goa Dhan 2, Panvel
1 and Goa wild rice (GWR) 005 appears to be completely different from the FL478 haplotype
indicating tolerance in these genotypes is controlled by genomic region other than Saltol. These
three genotypes with probable novel regions for seedling stage salt tolerance can be considered
for enhancing salinity tolerance of rice cultivars.
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Date 2021-07-30T09:34:29Z
2021-07-30T09:34:29Z
2021-05-25
 
Type Research Paper
 
Identifier Manohara, K., Morajkar, S., Shanbhag, Y., Phadte, P., & Singh, N. (2021). Haplotype analysis of Saltol QTL region in diverse landraces, wild rice and introgression lines of rice (Oryza sativa L.). Plant Genetic Resources: Characterization and Utilization, 1-10. doi:10.1017/S1479262121000320
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http://krishi.icar.gov.in/jspui/handle/123456789/51489
 
Language English
 
Relation Not Available;
 
Publisher Cambridge University Press