title: Molecular Screening of Blast Resistance Genes in Rice using SSR Markers.
abstract: Rice Blast is the most devastating disease causing major yield losses in every year worldwide. It had been proved that using resistant rice varieties would be the most effective way to control this disease. Molecular screening and genetic diversities of major rice blast resistance genes were determined in 192 rice germplasm accessions using simple sequence repeat (SSR) markers. The genetic frequencies of the 10 major rice blast resistance genes varied from 19.79% to 54.69%. Seven accessions IC337593, IC346002, IC346004, IC346813, IC356117, IC356422 and IC383441 had maximum eight blast resistance gene, while FR13B, Hourakani, Kala Rata 1-24, Lemont, Brown Gora, IR87756-20-2-2-3, IC282418, IC356419, PKSLGR-1 and PKSLGR-39 had seven blast resistance genes. Twenty accessions possessed six genes, 36 accessions had five genes, 41 accessions had four genes, 38 accessions had three genes, 26 accessions had two genes, 13 accessions had single R gene and only one accession IC438644 does not possess any one blast resistant gene. Out of 192 accessions only 17 accessions harboured 7 to 8 blast resistance genes.
authors.affiliation: Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India.
authors.forename: A K
authors.initials: AK
authors.lastname: Singh
authors.affiliation: Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India.
authors.forename: P K
authors.initials: PK
authors.lastname: Singh
authors.affiliation: Department of Genetics and Plant Breeding, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi-221005, India.
authors.forename: Madhuri
authors.initials: M
authors.lastname: Arya
authors.affiliation: National Research Centre on Plant Biotechnology, Indian Agricultural Research Institute, New Delhi 110 012, India.
authors.forename: N K
authors.initials: NK
authors.lastname: Singh
authors.affiliation: STRASA-IRRI-India Office, Rajendra Place, 9 Floor, Aggrawal Corporate Tower, New Delhi 110 008, India.
authors.forename: U S
authors.initials: US
authors.lastname: Singh
keywords: SSR markers; blast; marker assisted selection; resistance genes; rice