Rice blast controlling techn utilizing genetic diversity of rice

Abstract

The rice blast controlling technology is to intercrop one raw of high-stem high-quality rice for every 4-8 rows of short stem hybrid rice, with the high stem variety being over 20 cm higher than the short stem one and having genetic difference or RGA fingerprint difference of over 10 % and maturation period difference of over 40 days. The said technology can control rice blast effectively, reduce the amount of applied farm chemical, increase the disease resistance, lodging resistance and yield of rice obviously.

Description

technical field [0001] The invention belongs to the technical field of rice cultivation methods. Background technique [0002] For a long time, in order to meet human food needs, rice production in countries around the world has had to pursue the goal of high yield and then high yield, and various rice regions have successively adopted large-scale planting of high-yield varieties and other supporting measures. However, the long-term large-scale planting of a single variety and the excessive application of pesticides and fertilizers have made the rice field production system increasingly simple and fragile, and the agricultural ecology has deteriorated. On the one hand, crop diseases occur frequently, and the differentiation and growth of pathogenic bacteria strains accelerate. Further breeding and spreading; on the other hand, some traditional high-quality rice varieties are gradually eliminated due to low yield and disease resistance degradation, wasting a lot of genetic re...

AI Technical Summary

Problems solved by technology

However, the long-term large-scale planting of a single variety and the excessive application of pesticides and fertilizers have made the rice field production system increasingly simple and fragile, and the agricultural ecology has deteriorated. On the one hand, crop diseases occur frequently, and the differentiation and growth of pathogenic bacteria strains accelerate. Further breeding and spreading; on the other hand, some traditional high-quality rice varieties are gradually eliminated due to low yield and disease resistance degradation, wasting a lot of genetic resources of rice varieties, and making these traditional rice varieties with good quality and high economic value breed endangered

Rice blast is a major disease of rice worldwide. For a long time, the control of rice blast has mainly relied on measures such as breeding and popularizing disease-resistant varieties, rational application of chemical pesticides, fertilizers, and implementation of health-care cultivation. However, extensive use of pesticides not only increases the production cost of rice, but also Pollution and damage to the ecological environment of farmland. Even if pesticides are applied to those traditional high-quality rice varieties with good quality and no disease resistance, it is difficult to control the serious harm of rice blast, which seriously hinders the production of rice and restricts the sustainable development of agriculture.

Although it has been predicted that the genetic diversity of rice varieties may be a solution to the susceptibility of monoculture rice to disease, no one knows the rules and there is no successful case of large-scale application so far

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