论文部分内容阅读
通过对旱稻与长芒稗杂交后代系“远F_2-1”、禾本科(Gramineae)及锦葵科(Malvaceae)6个属栽培品种8种基因型进行光合速率观察发现:1)不同科、属间,光合速率存在极大的差异,方差分析达显著水平。2)无论是同一科内还是不同科间,C_4作物光合速率均大干C_3作物,其顺序为稗草>高粱>玉米>谷子>远F_2-1>棉花>早稻。3)C_4作物不同属间,光合速率差异较大,尤以稗草最高,高粱、玉米次之,谷子最低,统计分析达显著水平。4)同一种内不同品种(基因型)间,光合速率无差异。5)C_3、C_4植物间远缘杂交与基因交流,是提高早稻光合速率的有效途径。本试验中,“远F_2-1”光合速率超母本(旱稻65)29.72％。
Through the observation of photosynthetic rate of 8 genotypes of 6 genus cultivars including “Far F_2-1”, Gramineae and Malvaceae in the cross between upland rice and barley, we found: 1) Between the photosynthetic rate there is a great difference, analysis of variance reached a significant level. 2) The photosynthetic rate of C_4 crops was higher than that of C_3 crops in the same or different families, and the order was barnyard grass> sorghum> corn> millet> far F_2-1> cotton> early rice. 3) The C_4 crops differed in their genus, and their photosynthetic rate varied greatly, especially in barnyardgrass, followed by sorghum, corn and millet, and the statistical analysis reached significant level. 4) There was no difference in photosynthetic rate between different varieties (genotypes) within the same species. 5) C_3, C_4 distant plant hybridization and gene exchange, is an effective way to improve the photosynthetic rate of early rice. In this experiment, the photosynthetic rate far F_2-1 (Upland rice 65) 29.72%.