Molecular markers of rice stripe virus disease-resistant major gene locus qSTV11

Abstract

The invention relates to molecular markers of a rice stripe virus disease-resistant major gene locus qSTV11, which belongs to the field of molecular genetics. The molecular markers are obtained by the following steps of: hybridizing a rice variety Nipponbare serving as a female parent with kasalath serving as a male parent; performing back crossing on a hybrid product and the Nipponbare; deriving to obtain a back crossing recombinant inbred line; performing genetic linkage analysis on the genotype of each family and corresponding disease index ratio; detecting the stripe virus disease-resistant major gene locus qSTV11, wherein alleles from kasalath have resistance effects; and screening to obtain molecular markers R21, R22, R13 and R48 which can be bred and utilized. The four molecular markers are used for detecting whether the kasalath and a derivative variety (line) contain the major gene locus or not, so that the rice stripe virus disease resistance level can be predicted and the selection efficiency of a stripe virus disease-resistant rice variety is improved remarkably.

Description

[0001] The present invention is a divisional application. The name of the original application is: Molecular marker method of qSTV11, the main gene locus for rice stripe leaf blight resistance. Application date: 2009.2.25 Application number: 200910024610.4. 1. Technical field [0002] The invention provides a molecular marker method for the main gene site qSTV11 resistant to rice stripe blight, belongs to the field of molecular genetics, and is specially used for the selection of rice stripe blight-resistant varieties and the screening and utilization of germplasm resources. 2. Background technology [0003] Rice stripe leaf blight is a viral disease caused by rice stripe virus, and its vector is mainly the small planthopper. In recent years, with the popularization and application of light cultivation techniques such as no-tillage, rice-wheat interleaving, and wheat-introducing rice, as well as susceptible high-yielding varieties, the expansion and harm of the SBPH carrier p...

AI Technical Summary

Problems solved by technology

The disease area in the severely diseased area accounts for more than 90% of the rice planting area. In the severely affected area, the rate of diseased holes and diseased plants in leaked fields is as high as 90%, and the rate of diseased plants is over 70%. Some fields basically lose harvest, causing huge economic losses

At present, the production is mainly combined with the adjustment of farming system and the improvement of cultivation technology, and the control of insects and diseases at the right time, but the effect is not good, and it pollutes the environment

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