Search results for: B.C. VIRAKTAMATH
Rice Science > 2016 > 23 > 3 > 144-151
Rice Science > 2015 > 22 > 6 > 300-308
Rice Science > 2011 > 18 > 3 > 178-186
Biotechnology Advances > 2010 > 28 > 4 > 451-461
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In marker-assisted breeding for bacterial blight (BB) resistance in rice, three major resistance genes, viz., Xa21, xa13 and xa5, are routinely deployed either singly or in combinations. As efficient and functional markers are yet to be developed for xa13 and xa5, we have developed simple PCR-based functional markers for both the genes. For xa13, we designed a functional PCR-based marker, xa13-prom...
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To develop and characterize introgression lines for leaf and neck blast resistance, 326 introgression lines were developed using various accessions of six different AA genome wild species in the genetic background of elite Indian varieties like PR114 and Pusa 44 and were screened for blast resistance. Stringent phenotyping coupled with genotyping using gene based markers led to the identification...
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Improvement of host plant resistance is one of the best methods to protect the yield from biotic stresses. Incorporation of major resistance genes or their variants into elite rice varieties will enhance the host plant resistance and its durability. Allele mining is a preferred choice to discover the novel allelic variants of major genes from wide range of germplasm. ‘True’ allele mining includes...
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Plant growth and yield are affected by many abiotic stresses like salinity, drought, cold and heavy metal; these stresses trigger up and down-regulate several genes through various transcription factors (TFs). Transcription factor binding motifs (TFBMs), located in the upstream region of the genes, associate with TFs to regulate the gene expression. Many factors, including the activation of miRNAs,...
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Identifying QTLs/genes for iron and zinc in rice grains can help in biofortification programs. 168 F 7 RILs derived from Madhukar×Swarna were used to map QTLs for iron and zinc concentrations in unpolished rice grains. Iron ranged from 0.2 to 224ppm and zinc ranged from 0.4 to 104ppm. Genome wide mapping using 101 SSRs and 9 gene specific markers showed 5 QTLs on chromosomes 1, 3, 5, 7 and...
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Advanced backcross QTL analysis was used to identify QTLs for seven yield and yield-related traits in a BC 2 F 2 population from the cross between a popular Oryza sativa cv Swarna and O. nivara IRGC81848. Transgressive segregants with more than 15% increased effect over Swarna were observed for all the traits except days to heading and days to 50% flowering. Thirty QTLs were detected...
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Enormous sequence information is available in public databases as a result of sequencing of diverse crop genomes. It is important to use this genomic information for the identification and isolation of novel and superior alleles of agronomically important genes from crop gene pools to suitably deploy for the development of improved cultivars. Allele mining is a promising approach to dissect naturally...
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Response of thermosensitive genic male sterility in rice to varying temperature situations was studied by using four TGMS lines. In three sets of maximum, minimum and their combined temperatures, it was observed that maximum temperature played a predominant role in influencing sterility/fertility of TGMS lines under the combined regimes. Expression of a TGMS gene was found to be influenced by the...
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