不同父本血缘玉米杂交种的光合特性和产量

Yield and Photosynthetic Characteristics of Different Paternal Blood Maize Hybrids

为了揭示不同父本玉米杂交种的产量、干物质累积和转运及光合特性的变化规律。以塘四平头血缘、旅大红骨血缘、Lancaster血缘和热带血缘自交系作父本的杂交种为试验材料,对其产量、干物质累积和转运、光合特性进行分析。结果表明:产量和净光合速率的表现均为塘四平头血缘>热带血缘>LANCASTER血缘>旅大红骨血缘作父本的玉米杂交种。以塘四平头血缘作父本的杂交种在干物质累积、干物质转移量及转移率、干物质转运对子粒的贡献率均最高。相关分析表明,产量与净光合速率、干物质转运率均呈显著正相关(R=0.982^*、0.956^*)。试验中,以塘四平头血缘自交系作父本和Reid血缘自交系作母本组配的杂交组合比其他组合在产量、干物质累积和光合特性表现优良,可增加其选育的成功率。

In order to reveal the changes in yield, dry matter accumulation, transport and photosynthetic characteristics of different paternal maize hybrids,the hybrids of Tangsipingtou bloodline, Luda red bloodline, Lancaster bloodline and tropical bloodline hybrids were used as experimental materials, and their yield, dry matter accumulation, transport and photosynthetic characteristics were analyzed by routine statistical analysis. The results showed that performances of both yield and net photosynthetic rate were as follows: hybrids with Tangsipingtou bloodline as male parent>hybrids with tropical bloodline as male parent>hybrids with Lancaster bloodline as male parent>hybrids with Buda red bone bloodline as male parent. The hybrids with Tangsipingtou bloodline as male parent had the highest contribution to dry matter accumulation, dry matter transfer and transfer rate, and dry matter transfer to grain. Correlation analysis showed that there was a significant positive correlation between yield and net photosynthetic rate and dry matter transfer rate(R=0.982^*, 0.956^*). In this experiment, the hybrid combination with Tangsipingtou bloodline inbred line as male parent and Reid bloodline inbred line as female parent was superior to other combinations in yield, dry matter accumulation and photosynthetic characteristics, which could increase the success rate of breeding.