高产特优组合库、源、流特性研究

以杂交稻特优多系1号和特优63为供试材料,汕优63为对照,研究高产杂交稻特优组合的库、源、流特性。结果表明:特优多系1号和特优63源、库、流特性相似,差异不大;高产杂交稻特优组合库容量大,主要体现在大穗优势上;冠层叶挺直,比叶重高,叶面积指数大,光合产物积累量大,特别是生育中、后期干物质生产优势明显,粒叶比高;花后光合产物对籽粒充实的贡献大,源库流间流的通畅性好,库、源、流能在较高水平上协调是特优组合高产的主要成因。

Sink, source and flow characteristics of high-yield Indica hybrid Teyou combinations

Characteristics of the sink,source and flow of the high-yield hybrid Teyou combinations-Teyouduoxi 1 and Teyou 63 were studied using Indica hybrid Shangyou 63 as control.The results showed that(a) the characteristics of Teyouduoxi 1 were similar to those of Teyou 63;(b) the high-yield hybrid Teyou combination was superior in sink capacity(indicated especially in its bigger panicles) and had more erect leaves in the canopy,higher dry leaf weight per unit area,larger leaf area index,more dried matter accumulation(especially during medium and late growth period),and higher ratio of grains to leaf area;(c) more photosynthate was translated to grains after flowering;and,(d) the flow was efficient from the source to sink.It is concluded that the combined desirable characteristics of the sink,source,and flow contributed to the high yield in Teyou combinations.