一个水稻白化致死突变体abl25鉴定及其基因定位

经Co60辐照的粳稻嘉花1号得到一个新的致死白化突变体albino lethal 25(abl25),该突变体从发芽至4叶期表现为白化苗,之后逐渐死亡.与野生型嘉花1号相比,abl25突变体的叶绿素含量和类胡萝卜素的含量大大降低,叶绿体结构不正常,说明其叶绿体发育受到严重阻碍,导致植物死亡.遗传分析表明:该突变体受一对隐性核基因(abl25)控制,进一步利用abl25与广占63S杂交的F2分离群体,将该突变体基因(abl25)定位于第2染色体上SSR标记RM424与Indel分子标记ID7330之间,随后利用新开发的分子标记和扩大群体将其定位在Indel分子标记ID9111和ID9261之间的150 kb内,发现abl25是一个新的水稻苗期白化致死基因.     

Morphological and physiological analysis of narrow and striped leaf 1 （nsl1） mutant of rice （Oryza sativa L.） and the gene mapping

The shape and color of rice leaves are impor- tant agronomic traits that directly influence the proportion of sunlight energy utilization and ultimately affect the yield and quality. A new mutant exhibiting stable inheritance was identified as derived from ethyl methane sulfonate （EMS）-treated restorer Jinhui 10, tentatively named as narrow and striped leaf 1 （nsll）. The nsll displayed pale white leaves at the seeding stage and then white striped leaves in parallel to the main vein at the jointing stage. Meanwhile, its leaf blades are significantly narrower than the control group of Jinhui 10. The chloroplast structures of cells in the white striped area of the nsll mutant break down, and the photosynthetic pigments are significantly lower than that of the wild type. Moreover, fluorescence parameters, such as Fo, Fv/Fm, ФpsⅡ, qP, and ETR, in the nsll mutant are significantly lower than those of the wild type, and the photosynthetic efficiency is also significantly decreased. These changes in leaf color and shape, together with physiological changes in the nsll, result in smaller plant height and a decrease in the most important agro- nomic traits, such as the number of grains per panicle, grain weight, etc. Genetic analysis shows that the narrow and striped traits of the nsll mutant are controlled by a single recessive nuclear gene, which is located between InDel 16 and InDel 12 in chromosome 3. The physical distance is 204 kb. So far, no similar genes of such leaf color and shape in this area have been reported, This study has laid asolid foundation for the gene cloning and function analysis of NSL 1.     

Prediction and calculation for new energy development

Some important questions for new energy development were discussed, such as the prediction and calculation of sea surface temperature, ocean wave, offshore platform price, typhoon track, fire status, vibration due to earthquake, energy price, stock market＇ s trend and so on with the fractal methods （ including the four ones of constant dimension fractal, variable dimension fractal, complex number dimension fractal and fractal series） and the improved rescaled range analysis （R/S analysis）.     

传感器网络中一种考虑空间相关性的簇内多树路由协议

为了节省传感器网络WSN(wireless sensor networks)中节点之间的通信能耗和提高数据传输的可靠性,提出一种考虑空间相关性的簇内多树路由协议SCMTBRP.SCMTBRP考虑了路由建立时下一跳节点的能量、节点之间的能耗距离以及空间相关性等综合传输成本,在簇内节点和簇头之间建立以簇头为根的多路由树,节...     

LiX-（X=H，F，Cl）分子离子基态（X^2∑＋）势能函数与力常量

利用Gaussian09程序包中单双取代的耦合簇理论（CCSD）对LiX-（X=H，F，Cl）分子离子基态进行了几何优化和频率计算，进一步进行了单点能扫描计算．用最小二乘法拟合得到了LiX-（X=H，F，Cl）分子离子基态的Murrell—Sorbie势能函数，计算得到了LiX-（X=H，F，Cl）分子离子基态的力常量．