中国水稻科学2003，Vol.17Issue(z1)：77-83,7.
水稻籼粳交DH群体中影响白背飞虱抗虫性QTL的检测
Detection of QTLs Affecting Whitebacked Planthopper Resistance in an Indica/Japonica Doubled Haploid Rice Population
摘要
Abstract
Quantitative trait loci (QTLs) affecting the whitebacked planthopper (WBPH) resistance and susceptibility in an indica/japonica doubled halpoid (DH) rice population were analyzed. Although the parents of DH lines, Zhaiyeqing 8 (ZYQ-8, indica) and Jingxi 17 (JX-17, japonica), had no sucking inhibitory resistance, WBPH sucking was strongly suppressed in six DH lines for possible transgressive segregation. A minor QTL affecting honeydew excretion was detected at a japonica segment of chromosome 3. Japonica parent JX-17 had ovicidal resistance to WBPH. Ovicidal trait in DH lines was phenotyped by necrotic symptoms on the leaf sheaths due to ovicidal response. Four ovicidal QTLs were located on japonica segments of chromosomes 1, 2, 6, and 8 in DH lines at early- and mid-tillering stages. One more QTL appearing at mid-tillering stage was located on an indica segment of chromosome 9. The ovicidal loci reduced to two at the maximum tillering to booting stage. Analysis based on the maximum score of ovicidal symptom for each DH line throughout the experimental period revealed four QTLs on chromosomes 2, 6 and 9. Two major QTLs were located closely on japonica segments of chromosome 6. Three QTLs affecting the density of the second-generation WBPH nymphs were detected on chromosomes 1, 3 and 5. A main-effect QTL on chromosome 3 was derived from the japonica parent. A minor QTL on chromosome 5 came from the indica parent. Two QTLs for WBPH damages were located on indica segments of chromosomes 8 and 10, and the other QTL on a japonica segment of chromosome 3. These QTLs were considered to be associated with the expression of field resistance of rice varieties to WBPH.关键词
白背飞虱/品种抗性/加倍单倍体群体/水稻/数量性状位点Key words
whitebacked planthopper/varietal resistance/doubled haploid population/rice/quantitative trait locus分类
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寒川一成,滕胜,钱前,曾大力,曾娟,钱忠海,朱立煌..水稻籼粳交DH群体中影响白背飞虱抗虫性QTL的检测[J].中国水稻科学,2003,17(z1):77-83,7.基金项目
JIRCAS国际合作研究项目(B3333101). （B3333101）
