[Objective] The aim of the study was to make research on genomic struc- ture variation and variety analysis of Dongxiang wild rice. [Method] Introgression groups of BC1F6 were based on donor of Oryza rufipogon Griff. ...[Objective] The aim of the study was to make research on genomic struc- ture variation and variety analysis of Dongxiang wild rice. [Method] Introgression groups of BC1F6 were based on donor of Oryza rufipogon Griff. and receptor of O. sativa sp. indica Kate. Strains of 239 in the group were analyzed on Polymor- phism with the help of 25 couples of SSR primers distributed in 12 pairs of chromo- somes. [Result] Gene fragments of O. rufipogon Griff. were found penetrated in the 25 microsatellite sites and most of the groups kept the parents of Xieqinzao B or DNA sequence of O. rufipogon Griff. The average rate of recurrent homozygous bands was 78.13% in the ILs, but the highest was 94.98% (amplified by primer RM131) and the lowest was 60.25% (RM171). The average rate of donor homozy- gous bands was 13.37%, but the highest was 32.64% (RM171) and the lowest was 2.93% (RM1095). There were numerous heterozygous sites in the population and the average heterozygosis rate was 5.62%, while the highest was 10.04%(RM401). Moreover, we found some parental fragments were lost and some novel fragments were not detected in either parent in BC1F6 population. The average rate of lost bands was 2.88%, while the highest was 13.39% (RM311) and the lowest was 0 (RM401). The average rate of new bands was 1%. The average of Nei's gene di- versity (He) and Shannon's Information index (I) were 0.276 and 0.457 respectively in high generation of introgression lines. [Conclusion] The study demonstrated that distant hybridization led to extensive genetic and epigenetic variations in high gener- ation of introgression lines, which expanded the base of genetic variation and laid an important foundation for rice improvement and germplasm innovation.展开更多
The spread of Western learning to the East objectively promoted the dissemination of Marxist philosophy, forming an important historical precondition for its Sinicization. Moreover, it triggered a great transformation...The spread of Western learning to the East objectively promoted the dissemination of Marxist philosophy, forming an important historical precondition for its Sinicization. Moreover, it triggered a great transformation in the historical development of Chinese philosophy and facilitated its transition from an ancient to an early modem tradition, thereby establishing through Sinicization a link between Marxist philosophy, which originated in the Western philosophical tradition, and the Chinese tradition of philosophy, and rendering Marxist philosophy Chinese. This offered the possibility that Sinicized Marxist philosophy would play a positive guiding role in the development of modern Chinese philosophy. Therefore, we may say that without the spread of Western learning to the East, there would be no Sinicization of Marxist philosophy; and without in-depth research on the relationship between the Eastward spread of Western learning and the Sinicization of Marxist philosophy, we would have no real understanding of the Sinicization of Marxist philosophy. However, the close links between the Sinicization of Marxist philosophy and the spread of Western learning do not indicate that the former is part of the history of latter. The Sinicization of Marxist philosophy does not itself belong to the category of the spread of Western learning to the East. This is because Marxist philosophy is essentially different from all other forms of what is commonly known as Western learning, and its Sinicization differs from the Eastward spread of Western learning in terms of its goals, social nature, results and effects on society.展开更多
Mummified fossils are extraordinarily important for understanding both biotic evolution and ecology in the geological time,by uniquely providing a far more detailed source of information in comparison to impression ma...Mummified fossils are extraordinarily important for understanding both biotic evolution and ecology in the geological time,by uniquely providing a far more detailed source of information in comparison to impression materials.However,mummified fossils are extremely rare because of the inevitable requirement of unusual preservation conditions during fossilization,including the lithological features and deposition rate of surrounding rocks,and moisture and temperature conditions(Taylor et al.,2009).To date,only a few Cenozoic sites have been reported to yield mummified plant fossils around the world,展开更多
基金partially supported by National Natural Science Foundation of China(30860120,30900781)Science and Technology Projects of Jiangxi Education Department(GJJ09464)Natural Science Foundation of Jiangxi(2008GQN0059)~~
文摘[Objective] The aim of the study was to make research on genomic struc- ture variation and variety analysis of Dongxiang wild rice. [Method] Introgression groups of BC1F6 were based on donor of Oryza rufipogon Griff. and receptor of O. sativa sp. indica Kate. Strains of 239 in the group were analyzed on Polymor- phism with the help of 25 couples of SSR primers distributed in 12 pairs of chromo- somes. [Result] Gene fragments of O. rufipogon Griff. were found penetrated in the 25 microsatellite sites and most of the groups kept the parents of Xieqinzao B or DNA sequence of O. rufipogon Griff. The average rate of recurrent homozygous bands was 78.13% in the ILs, but the highest was 94.98% (amplified by primer RM131) and the lowest was 60.25% (RM171). The average rate of donor homozy- gous bands was 13.37%, but the highest was 32.64% (RM171) and the lowest was 2.93% (RM1095). There were numerous heterozygous sites in the population and the average heterozygosis rate was 5.62%, while the highest was 10.04%(RM401). Moreover, we found some parental fragments were lost and some novel fragments were not detected in either parent in BC1F6 population. The average rate of lost bands was 2.88%, while the highest was 13.39% (RM311) and the lowest was 0 (RM401). The average rate of new bands was 1%. The average of Nei's gene di- versity (He) and Shannon's Information index (I) were 0.276 and 0.457 respectively in high generation of introgression lines. [Conclusion] The study demonstrated that distant hybridization led to extensive genetic and epigenetic variations in high gener- ation of introgression lines, which expanded the base of genetic variation and laid an important foundation for rice improvement and germplasm innovation.
文摘The spread of Western learning to the East objectively promoted the dissemination of Marxist philosophy, forming an important historical precondition for its Sinicization. Moreover, it triggered a great transformation in the historical development of Chinese philosophy and facilitated its transition from an ancient to an early modem tradition, thereby establishing through Sinicization a link between Marxist philosophy, which originated in the Western philosophical tradition, and the Chinese tradition of philosophy, and rendering Marxist philosophy Chinese. This offered the possibility that Sinicized Marxist philosophy would play a positive guiding role in the development of modern Chinese philosophy. Therefore, we may say that without the spread of Western learning to the East, there would be no Sinicization of Marxist philosophy; and without in-depth research on the relationship between the Eastward spread of Western learning and the Sinicization of Marxist philosophy, we would have no real understanding of the Sinicization of Marxist philosophy. However, the close links between the Sinicization of Marxist philosophy and the spread of Western learning do not indicate that the former is part of the history of latter. The Sinicization of Marxist philosophy does not itself belong to the category of the spread of Western learning to the East. This is because Marxist philosophy is essentially different from all other forms of what is commonly known as Western learning, and its Sinicization differs from the Eastward spread of Western learning in terms of its goals, social nature, results and effects on society.
基金the National Natural Science Foundation of China (Grant Nos. 41210001, 41372002 & 41528201)National Basic Research Program of China (Grant No. 2012CB822003)
文摘Mummified fossils are extraordinarily important for understanding both biotic evolution and ecology in the geological time,by uniquely providing a far more detailed source of information in comparison to impression materials.However,mummified fossils are extremely rare because of the inevitable requirement of unusual preservation conditions during fossilization,including the lithological features and deposition rate of surrounding rocks,and moisture and temperature conditions(Taylor et al.,2009).To date,only a few Cenozoic sites have been reported to yield mummified plant fossils around the world,