신광벼 유래의 벼 줄무늬잎마름병 저항성 주동 QTL qSTV11^(SG)탐색
Identification of a Major QTL, qSTV11SG, Associated with Resistance to Rice Stripe Virus Disease Originated from Shingwangbyeo in Rice (Oryza Sativa L.)
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초록
Virus diseases often cause serious damage to rice production in Asia. The lack of information on virus resistance genes has been a major obstacle for the breeding of resistant varieties. In order to identify DNA marker associated with resistance against rice stripe virus (RSV), the quantitative trait locus (QTL) was carried out using advanced backcross population developed from a cross between RSV-resistant tongil type cultivar Shinkwang and susceptible japonica cultivar Ilpum. A RSV resistance QTL qSTV11^(SG) explaining 44.2% of the phenotypic variation was identified on chromosome 11 of Tongil type rice cultivar ‘Shingwang’. qSTV11^(SG) was tightly linked to DNA marker RM6897. The RM6897 divided as resistance type allele and susceptible type alleles. Twenty seven resistant varieties showed the resistant-type allele and 23 susceptible varieties were susceptible-type allele to the marker of RM6897. This results and the molecular markers presented here may be useful in rice breeding for improving RSV resistance in japonica rice.
Abstract
Virus diseases often cause serious damage to rice production in Asia. The lack of information on virus resistance genes has been a major obstacle for the breeding of resistant varieties. In order to identify DNA marker associated with resistance against rice stripe virus (RSV), the quantitative trait locus (QTL) was carried out using advanced backcross population developed from a cross between RSV-resistant tongil type cultivar Shinkwang and susceptible japonica cultivar Ilpum. A RSV resistance QTL qSTV11^(SG) explaining 44.2% of the phenotypic variation was identified on chromosome 11 of Tongil type rice cultivar ‘Shingwang’. qSTV11^(SG) was tightly linked to DNA marker RM6897. The RM6897 divided as resistance type allele and susceptible type alleles. Twenty seven resistant varieties showed the resistant-type allele and 23 susceptible varieties were susceptible-type allele to the marker of RM6897. This results and the molecular markers presented here may be useful in rice breeding for improving RSV resistance in japonica rice.
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