Mapping of quantitative trait loci associated with resistance to brown planthopper in rice by means of a doubled haploid population.(Genomics, Molecular Genetics & Biotechnology)

Crop Science,  November, 2004  by Gunathilagaraj, K.; Kadirvel, P.; Maheswaran, M.; Soundararajan, R.P.

Tags: biotechnology, chromosome, Molecular Inc., pest

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The brown planthopper (BPH), Nilaparvata lugens (Stal) (Homoptera: Delphacidae), is one of the major insect pests of rice (Oryza sativa L.). Many major genes are now available to manage this pest through host-plant resistance. In this study, we mapped quantitative trait loci (QTLs) associated with resistance to BPH using a doubled haploid (DH) population derived from the cross IR64/Azucena.

We evaluated a set of 94 DH lines using a series of phenotypic tests that cover seedling resistance and resistance mechanisms: antixenosis, antibiosis, and tolerance. QTL analysis detected six QTLs on ...

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