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Blast diseases influenced on agronomic and eating quality traits of rice in Korea
- 언어ENG
- URLhttps://db.koreascholar.com/Article/Detail/297659
Rice (Oryza sativa L.) is one of the most important staple foods that feed more than 50% of the world’s population. With the improving of people’s living standard, eating quality of rice become the most important aims in current breeding programs. Amylose content (AC) and gelatinization temperature (GT) are the two main measures to estimate the rice grain quality. In rice, a total of 27 genes directly involved the rice starch biosynthesis effecting on the rice eating quality. It clearly identified chromosome 6 to be rich in the genes related to AC and GT properties (GBSS I, SSIIa and SBE I) along with other genomic regions scattered in rice genome. Rice blast, caused by the fungal pathogen M. oryzae, is the most devastating disease of rice and severely affects crop stability and sustainability worldwide. Many fungal genes involved in pathogenicity and rice genes involved in effector recognition and defense responses have been identified over the past decade. A total of 99 and 22 blast resistance genes have been identified and cloned; in which 45% were found in japonica cultivars, 51% in indica cultivars, and the rest 4% in wild rice species. Among them, three major resistance gene clusters have been characeterized: the Pik locus on Chromosome 11, and the Pita locus on Chromosome 12, the Piz locus on Chromosome 6 closely to the starch synthesis-related genes. These results could be important clues for studying the relationship between resistance / susceptible materials and eating quality.
