Open AccessIdentification of quantitative trait loci associated with resistance to brown planthopper in the indica rice cultivar Col.5 Thailand
Author(s) -
Sun Lihong,
Liu Yuqiang,
Jiang Ling,
Su Changchao,
Wang Chunming,
Zhai Huqu,
Wan Jianmin
Publication year - 2007
Publication title -
hereditas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 50
eISSN - 1601-5223
pISSN - 0018-0661
DOI - 10.1111/j.2006.0018-0661.01932.x
Subject(s) - biology , brown planthopper , cultivar , quantitative trait locus , identification (biology) , resistance (ecology) , trait , botany , agronomy , genetics , gene , computer science , programming language
The brown planthopper (BPH) is one of the most serious insect pests of rice throughout Asia. In this study, we constructed a linkage map to determine the locus for BPH resistance gene, using an F 2 population from a cross between a resistant indica cultivar, ‘Col.5 Thailand’, and a susceptible cultivar ‘02428’. Insect resistance was evaluated using 147 F 3 families and the genotype of each F 2 plant was inferred from the phenotype of corresponding F 3 families. Two QTLs was detected on chromosome 2 (explains 29.4% phenotypic variation) and 6 (46.2% variation explained) associated with resistance to BPH in the mapping population. Comparison of the chromosomal locations and reactions to BPH biotypes indicated that the gene on chromosome 6 is different from at least 18 of the 19 previously identified BPH resistance genes. These two genes have large effects on BPH resistance and may be a useful BPH resistance resource for rice breeding programs.