According to the analysis about resistance to agression. competitive effect and synergistic effect of hy brid rice Youza 1 and its female parent Lemont, Youza I showed strong competitive ability over Lemont, resulted ...According to the analysis about resistance to agression. competitive effect and synergistic effect of hy brid rice Youza 1 and its female parent Lemont, Youza I showed strong competitive ability over Lemont, resulted severe inhibition of tillering, panicle development of Lemont plants. It was demonstrated that there were no signifi cant differences of grain yields when the range of the hybrid seed purities were from 70% to over 90% because of the compensation function by super competitive capacity of Youza 1.展开更多
A comparative study on the photosynthetic parameters among intergeneric progenies derived from Oryza sativa L.× Sorghum vulgare L. , its maternal parent Gui 630 and commercial 3-line hybrid rice Shanyou 63 in pot...A comparative study on the photosynthetic parameters among intergeneric progenies derived from Oryza sativa L.× Sorghum vulgare L. , its maternal parent Gui 630 and commercial 3-line hybrid rice Shanyou 63 in pot experiment in greenhouse was conducted. The morphological and photosynthetic characters of canopy leaves and chlorophyll fluorescence kinetic pm'mneters including Fv/Fm, Fv/F0, photochemical quenching coefficient and non-photochemical coefficient of canopy leaves of 3 varieties were measured. The results showed the progeny, Yuanyou 1, derived from an intergeneric cross of rice and sorghum possesses better canopy spatial architecture with thicker, heavier and bigger canopy leaf than its maternal parent Gui 630.Higher photosynthetic rate due to higher chlorophyll content, higher primary energy transformation efficiency,potential of PSII and non-photochemieal quenching coefficient (qE) were also measured in Yuanyou 1. These explain partly why the intergeneric progeny has higher biomass production, and better tolerance to adverse conditions and higher field yields even under stress conditions.展开更多
文摘According to the analysis about resistance to agression. competitive effect and synergistic effect of hy brid rice Youza 1 and its female parent Lemont, Youza I showed strong competitive ability over Lemont, resulted severe inhibition of tillering, panicle development of Lemont plants. It was demonstrated that there were no signifi cant differences of grain yields when the range of the hybrid seed purities were from 70% to over 90% because of the compensation function by super competitive capacity of Youza 1.
文摘A comparative study on the photosynthetic parameters among intergeneric progenies derived from Oryza sativa L.× Sorghum vulgare L. , its maternal parent Gui 630 and commercial 3-line hybrid rice Shanyou 63 in pot experiment in greenhouse was conducted. The morphological and photosynthetic characters of canopy leaves and chlorophyll fluorescence kinetic pm'mneters including Fv/Fm, Fv/F0, photochemical quenching coefficient and non-photochemical coefficient of canopy leaves of 3 varieties were measured. The results showed the progeny, Yuanyou 1, derived from an intergeneric cross of rice and sorghum possesses better canopy spatial architecture with thicker, heavier and bigger canopy leaf than its maternal parent Gui 630.Higher photosynthetic rate due to higher chlorophyll content, higher primary energy transformation efficiency,potential of PSII and non-photochemieal quenching coefficient (qE) were also measured in Yuanyou 1. These explain partly why the intergeneric progeny has higher biomass production, and better tolerance to adverse conditions and higher field yields even under stress conditions.
