The vascular bundle in plants plays an important role intransportation of photosynthetic products, mineral nutri-ents, water, arid so on. Significant positive correlationswere found between grain yield, panicle traits...The vascular bundle in plants plays an important role intransportation of photosynthetic products, mineral nutri-ents, water, arid so on. Significant positive correlationswere found between grain yield, panicle traits and the No.of peduncle vascular bundles. So, it is very important tostudy the inheritance of peduncle vascular bundle, whichis a quantitative trait.展开更多
Tiller angle of rice is an important agronomic trait that contributes to breed new varieties with ideal archi-tecture. In this study, we report mapping and characteriza-tion of a rice mutant defective in tiller angle....Tiller angle of rice is an important agronomic trait that contributes to breed new varieties with ideal archi-tecture. In this study, we report mapping and characteriza-tion of a rice mutant defective in tiller angle. At the seedling stage, the newly developed tillers of the mutant plants grow with a large angle that leads to a lazy phenotype at the mature stage. Genetic analysis indicates that this tiller- spreading phenotype is controlled by one recessive gene that is allelic to a reported mutant la. Therefore, the mutant was named la-2 and la renamed la-1. To map and clone LA, we constructed a large mapping population. Genetic linkage analysis showed that the LA gene is located between 2 SSR markers RM202 and RM229. By using the 6 newly-developed molecular markers, the LA gene was placed within a 0.4 cM interval on chromosome 11, allowing us to clone LA and study the mechanism that controls rice tiller angle at the molecular level.展开更多
A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-t...A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-tuce roots growth was investigated, and the QTLs analysis of rice allelopathy was carried out. Totally, four QTLs related to rice allelopathy were detected, and they were on chromo-somes 3, 9, 10 and 12, respectively. The LOD scores were3.40, 2.68. 2.75 and 3.08, respectively. Among them, additive effects of the QTLs on chromosomes 3 and 10 were 1.65 and 1.43, on chromosomes 9 and 12 were -1.44 and -1.58, re-spectively. Allelopathy characteristics of another three com-mon rice varieties were also studied.展开更多
文摘The vascular bundle in plants plays an important role intransportation of photosynthetic products, mineral nutri-ents, water, arid so on. Significant positive correlationswere found between grain yield, panicle traits and the No.of peduncle vascular bundles. So, it is very important tostudy the inheritance of peduncle vascular bundle, whichis a quantitative trait.
基金supposed by the State High-Tech Program(Grant No.J02-A-001)the National Natural Science Foundation of China(Grant No.30021002).
文摘Tiller angle of rice is an important agronomic trait that contributes to breed new varieties with ideal archi-tecture. In this study, we report mapping and characteriza-tion of a rice mutant defective in tiller angle. At the seedling stage, the newly developed tillers of the mutant plants grow with a large angle that leads to a lazy phenotype at the mature stage. Genetic analysis indicates that this tiller- spreading phenotype is controlled by one recessive gene that is allelic to a reported mutant la. Therefore, the mutant was named la-2 and la renamed la-1. To map and clone LA, we constructed a large mapping population. Genetic linkage analysis showed that the LA gene is located between 2 SSR markers RM202 and RM229. By using the 6 newly-developed molecular markers, the LA gene was placed within a 0.4 cM interval on chromosome 11, allowing us to clone LA and study the mechanism that controls rice tiller angle at the molecular level.
基金supported by the National Natural Science Foundation of China(Grant No.33970409)the Natural Science Foundation of Zhejiang Province(Grant No.300221).
文摘A double haploid population derived from an-ther culture of ZYQ8/JX17, a typical indica and japonicahybrid, was used in this study. The inhibited effect ofwater-soluble extract of 123 DH pure lines leaves on the let-tuce roots growth was investigated, and the QTLs analysis of rice allelopathy was carried out. Totally, four QTLs related to rice allelopathy were detected, and they were on chromo-somes 3, 9, 10 and 12, respectively. The LOD scores were3.40, 2.68. 2.75 and 3.08, respectively. Among them, additive effects of the QTLs on chromosomes 3 and 10 were 1.65 and 1.43, on chromosomes 9 and 12 were -1.44 and -1.58, re-spectively. Allelopathy characteristics of another three com-mon rice varieties were also studied.
