Immortalized F2 population of rice (Oryza sativa L.) was developed by randomly mating F1 among recombinant inbred (RI) lines derived from (Zhenshan 97B×Minghui 63),which allowed replications within and across env...Immortalized F2 population of rice (Oryza sativa L.) was developed by randomly mating F1 among recombinant inbred (RI) lines derived from (Zhenshan 97B×Minghui 63),which allowed replications within and across environments.QTL (quantitative trait loci) mapping analysis on kilo-grain weight of immortalized F2 population was performed by using newly developed software for QTL mapping,QTL Mapper 2.0. Eleven distinctly digenic epistatic loci included a total of 15 QTL were located on eight chromosomes.QTL main effects of additive,dominance,and additive×additive,additive×dominance,and dominance×dominance interactions were estimated.Interaction effects between QTL main effects and environments (QE) were predicted.Less than 40% of single effects,most of which were additive effects,for identified QTL were significant at 5% level.The directional difference for QTL main effects suggested that these QTL were distributed in parents in the repulsion phase.This should make it feasible to improve kilo-grain weight of both parents by selecting appropriate new recombinants. Only few of the QE interaction effects were significant.Application prospect for QTL mapping achievements in genetic breeding was discussed.展开更多
The paper set off from the nature characteristics of rural cooperation finance, analyzing the finance cooperation in our rural areas. It points out that the supporting strength is difficult to maintain the need of sim...The paper set off from the nature characteristics of rural cooperation finance, analyzing the finance cooperation in our rural areas. It points out that the supporting strength is difficult to maintain the need of simple reproduction, disturbing the consistence between the intense need of the important peasant household and the market-oriented development of enterprise produce What is more, and functional cultivating becomes reverse circulation, forming shoulders adjustment mechanism in the majority of our rural areas. In the long run, if we want to break the influence of the long-term effect of dual economy between urban and rural areas, plan the development of urban and rural as a whole, build socialism new rural area, the key is to comply with the principle ＂root in rural area, originally in the peasant, quality in cooperation ＂, build and perfect the serve system of rural cooperation finance.展开更多
文摘Immortalized F2 population of rice (Oryza sativa L.) was developed by randomly mating F1 among recombinant inbred (RI) lines derived from (Zhenshan 97B×Minghui 63),which allowed replications within and across environments.QTL (quantitative trait loci) mapping analysis on kilo-grain weight of immortalized F2 population was performed by using newly developed software for QTL mapping,QTL Mapper 2.0. Eleven distinctly digenic epistatic loci included a total of 15 QTL were located on eight chromosomes.QTL main effects of additive,dominance,and additive×additive,additive×dominance,and dominance×dominance interactions were estimated.Interaction effects between QTL main effects and environments (QE) were predicted.Less than 40% of single effects,most of which were additive effects,for identified QTL were significant at 5% level.The directional difference for QTL main effects suggested that these QTL were distributed in parents in the repulsion phase.This should make it feasible to improve kilo-grain weight of both parents by selecting appropriate new recombinants. Only few of the QE interaction effects were significant.Application prospect for QTL mapping achievements in genetic breeding was discussed.
文摘The paper set off from the nature characteristics of rural cooperation finance, analyzing the finance cooperation in our rural areas. It points out that the supporting strength is difficult to maintain the need of simple reproduction, disturbing the consistence between the intense need of the important peasant household and the market-oriented development of enterprise produce What is more, and functional cultivating becomes reverse circulation, forming shoulders adjustment mechanism in the majority of our rural areas. In the long run, if we want to break the influence of the long-term effect of dual economy between urban and rural areas, plan the development of urban and rural as a whole, build socialism new rural area, the key is to comply with the principle ＂root in rural area, originally in the peasant, quality in cooperation ＂, build and perfect the serve system of rural cooperation finance.
