An F9 recombinant inbred lines （RIL） population, derived from a cross between IR28 （Oryza sativa L. spp. indica） and Daguandao （O. sativa L. spp. japonica）, was used to construct a molecular linkage map and to i...An F9 recombinant inbred lines （RIL） population, derived from a cross between IR28 （Oryza sativa L. spp. indica） and Daguandao （O. sativa L. spp. japonica）, was used to construct a molecular linkage map and to identify germination ability including the traits of imbibition rate, germination rate, germination index, root length, shoot length and seed vigor at 14℃ for 23 d. A composite interval mapping approach was applied to conduct genetic analysis for germination ability. The frequency distributions of the germination ability traits under the cold stress in the RIL population showed continuous segregation, suggesting they were quantitative traits controlled by several genes. A total of seven QTLs were identified on chromosomes 4 6 and 9, including two for imbibition rate （qIR-6, qIR-9）, one for germination rate （qGR-4）, two for germination index （qGI-4-1, qGI-4-2） and two for root length （qRL-4-1, qRL-4-2）. There were no detected QTLs controlling shoot length and seed vigor. The phenotypic variance explained by a single QTL ranged from 9.1% to 37.0%, and two major QTLs, qlR-6 and qGI-4-2, accounted for over 30% of the phenotypic variance. The expressions of QTLs were developmentally regulated and growth stage-specific. Most of the QTLs observed here were located in the regions similar to the QTLs for rice cold tolerance reported previously, indicating that these QTLs were reliable. However, qRL-4-2 is not reported before.展开更多
Aiming at the dispersion stability of nanofluids,we investigate the absorbency and the zeta potential of TiO_(2) and Al2O3 nanofluids under different pH values and different dispersant concentrations.The results show ...Aiming at the dispersion stability of nanofluids,we investigate the absorbency and the zeta potential of TiO_(2) and Al2O3 nanofluids under different pH values and different dispersant concentrations.The results show that in the mass fraction 0.05%alumina and 0.01%titanium dioxide nanosuspensions,the absolute value of the zeta potential and the absorbency of the two nanofluids with sodium dodecyl sulfate(SDS)dispersant are the highest at an optimal pH(pHAl_(2)O_(3)≈6.0,pHTiO2≈9.5)and that there is a good correlation between absorbency and zeta potential:the higher the absolute value of the zeta potential is,the greater the absorbency is,and the better the stability of the system is.The optimizing concentrations for SDS are 0.10%and 0.14%,respectively,at which the two nanofluids have the best dispersion results.The calculated DLVO interparticle interaction potentials verify the experimental results of the pH effect on the stability behavior.展开更多
A new representation of Yangian for sl(2)is obtained from e(3)algebra.For the given rational solution of the quantum Yang-Baxter equation the algebraic relations of the transfer matrix is discussed and a new transfer ...A new representation of Yangian for sl(2)is obtained from e(3)algebra.For the given rational solution of the quantum Yang-Baxter equation the algebraic relations of the transfer matrix is discussed and a new transfer matrix related to Chaplygin-Goryachev top are constructed in terms of the generators of Yangian.展开更多
基金supported by the Jiangsu Agricultural Three-Area-Focused Program,China (Grant No.Q200670)the Program for Changjiang Scholars and Innovative Research Team in University (PCSIRT),China
文摘An F9 recombinant inbred lines （RIL） population, derived from a cross between IR28 （Oryza sativa L. spp. indica） and Daguandao （O. sativa L. spp. japonica）, was used to construct a molecular linkage map and to identify germination ability including the traits of imbibition rate, germination rate, germination index, root length, shoot length and seed vigor at 14℃ for 23 d. A composite interval mapping approach was applied to conduct genetic analysis for germination ability. The frequency distributions of the germination ability traits under the cold stress in the RIL population showed continuous segregation, suggesting they were quantitative traits controlled by several genes. A total of seven QTLs were identified on chromosomes 4 6 and 9, including two for imbibition rate （qIR-6, qIR-9）, one for germination rate （qGR-4）, two for germination index （qGI-4-1, qGI-4-2） and two for root length （qRL-4-1, qRL-4-2）. There were no detected QTLs controlling shoot length and seed vigor. The phenotypic variance explained by a single QTL ranged from 9.1% to 37.0%, and two major QTLs, qlR-6 and qGI-4-2, accounted for over 30% of the phenotypic variance. The expressions of QTLs were developmentally regulated and growth stage-specific. Most of the QTLs observed here were located in the regions similar to the QTLs for rice cold tolerance reported previously, indicating that these QTLs were reliable. However, qRL-4-2 is not reported before.
基金by the National Natural Science Foundation of China under Grant No 11047021the Fund for Talent Introduction to Advanced Universities of Guangdong under Grant No 2009109and the Guangdong Natural Science Foundation under Grant No 10151064201000006.
文摘Aiming at the dispersion stability of nanofluids,we investigate the absorbency and the zeta potential of TiO_(2) and Al2O3 nanofluids under different pH values and different dispersant concentrations.The results show that in the mass fraction 0.05%alumina and 0.01%titanium dioxide nanosuspensions,the absolute value of the zeta potential and the absorbency of the two nanofluids with sodium dodecyl sulfate(SDS)dispersant are the highest at an optimal pH(pHAl_(2)O_(3)≈6.0,pHTiO2≈9.5)and that there is a good correlation between absorbency and zeta potential:the higher the absolute value of the zeta potential is,the greater the absorbency is,and the better the stability of the system is.The optimizing concentrations for SDS are 0.10%and 0.14%,respectively,at which the two nanofluids have the best dispersion results.The calculated DLVO interparticle interaction potentials verify the experimental results of the pH effect on the stability behavior.
文摘A new representation of Yangian for sl(2)is obtained from e(3)algebra.For the given rational solution of the quantum Yang-Baxter equation the algebraic relations of the transfer matrix is discussed and a new transfer matrix related to Chaplygin-Goryachev top are constructed in terms of the generators of Yangian.
