高粒叶比小麦新品种济麦19高产生理基础研究 Ⅰ.发展动态与干物质积累

Study on physiological basis for high yield of wheat Jimai 19 with high grain-leaf ratio Ⅰ.Dynamics of population development and accumulation of dry matter

对不同粒叶比的济麦19和鲁麦14群体发展动态和干物质积累进行比较研究,结果表明:高粒叶比的济麦19无效分蘖少,茎蘖动态变化平缓,茎蘖成穗率高;绿叶面积持续期长,旗叶功能期长;光合速率高,干物质积累量大,籽粒灌浆速率高、时间长,粒重增长快,从而体现了源库流的协调一致。在株型育种中应注重高粒叶比品种的选择。

The population development and dry matter accumulation of Jimai 19 and Lumai 14 with different grain-leaf ratio has been studied The results showed that the population of Jimai 19 with higher grain-leaf ratio has good physiological characters for grain weight and yield, such as few invalid tillers, higher ratio of fertile tillers, longer period of green leaf area and its function, richer dry matter accumulation, higher grain filling rate and longer grain filling period, quicker increasing of grain weight These showed the better coordination among source, sink and transportation Therefore, the variety with higher grain-leaf ratio should be selected during wheat breeding for plant-type