不同类型高原粳稻产量和主要源库性状比较

Comparison on Yield and Main Source-sink Characters among Different Types of Plateau Japonica Rice

比较了滇型杂交粳稻、云光两系杂交粳稻、外引两系杂交粳稻、常规粳稻的产量和主要源库性状,结果表明,杂交粳稻产量和主要源库性状比常规粳稻具有极显著优势,滇型杂交粳稻的产量和库容量较两系杂交粳稻具有极显著优势,云光两系杂交粳稻与外引两系杂交粳稻具有相近的产量和库容量。滇型杂交粳稻结实率较低,上3叶面积等源性状存在劣势,表现出库大而源相对不足的特性。

The yield and main source-sink characters were compared among four types of plateau japonica rice in Yunnan Province, including Dian-type three-line japonica hybrid rice, Yunguang series of two-line japonica hybrid rice, the introduced two-line japonica hybrid rice and conventional japonica rice. The results showed that japonica hybrid rice was very significantly superior to conventional japonica rice in grain yield and main source-sink charac- ters. In terms of grain yield and sink capacity, D/an-type three-line japonica hybrid rice was very significantly su- perior to two-line japonica hybrid rice, and Yunguang series of two-line japonica hybrid rice was similar to the in- troduced two-line japonica hybrid rice. However, Dian-type three-line japonica hybrid rice showed a lower seed- setting rate, poorer source characters like a smaller area of top three leaves, indicating a weakness of relatively in- sufficient source to its large sink capacity.