亚种间杂交稻籽粒灌浆特性研究

本文用Ｒｉｃｈａｒｄｓ方程Ｗ＝Ａ（１＋Ｂｅ－ｋｔ）－１Ｎ描述了４个亚种间杂交稻及品种间杂交稻汕优６３的籽粒灌浆过程。结果表明，亚种间杂交稻一般较汕优６３的灌浆期短，灌浆速率低，但组合间差异很大，威优４１３的各项灌浆参数均接近于汕优６３，充实度也接近于汕优６３；协优４１３的灌浆速率低，特别是中后期，且后期短；汕优４１３的起始生长势较汕优６３高，中期灌浆速率高，但灌浆期短，特别是中期短；赣化７号的起始生长势低，灌浆期长，但灌浆速率低。协优４１３上部枝梗充实度较汕优６３低的主要原因是其起始生长势低，灌浆速率低，而中下部枝梗的主要原因是灌浆期短。

Study on the Characteristics of Grain Filling in Inter-subspecific Hybrid Rice

In this paper, Richards equation W=A(1+Be -kt ) -1N was used to describe the process of grain filling in four inter-subspecific hybrid rices and a inter-variety hybrid rice “Shanyou 63”. The results showed that comparing with Shanyou 63, the filling periods of inter-subspecific hybrid rice were generally shorter and their filling rate were lower, which varied from cross to cross, every parameter of grain filling of Weiyou 413 was close to that of Shanyou 63, its plumpness was close to that of Shanyou 63, too. The filling rate of Xieyou 413 was lower, especially during the middle and late period , and its late period was shorter; The initial growth power of Shanyou 413 was higer, its filling rate during middle period was higher, but its filling period was shorter, especially middle periods. The initial growth power of Ganghua 7 was lower, its filling period was longer, but it filling rate was lower. The main reason whythe plumpness of Xieyou 413 was lower than that of Shanyou 63 was its lower initial growth power and filling rate for upper branch, but was its shorter filling period for middle and lower branches.