摘要
采用徒手切片结合直观对应调查法研究了籼粳亚种间杂种F_1雏管束性状及其与籽粒充实度的关系,结果表明:1.伸长节间与穗颈维管束数目和大小,亚种间杂交稻>品种间杂交稻>常规稻。亚种间杂交稻籽粒充实度差主要与其输导组织的颖花负荷量过重有关。2.籽粒充实度差的亚种间杂交稻穗基部一次枝梗维管束性状优于穗项部,与对照表现一致;但其单个大维管束的韧皮部横切面积穗基部的远小于穗顶部。3.亚种间杂交稻伸长节间的大维管束数目,上部<下部,与品种问杂交稻相同但与常规稻相反。
The characters of bundle in intersubspecific hybrid rice (IHR) and its relation to the grain plumpness(GP) were studied by free hand section. The results were as follows. ①The number and transected area of bundle in both elongated internode and panicle neck of IHR were larger than those of intervariety hybrids and the latter were larger than those of conventional rice. The poor GP in IHR was mainly due to the over burdened capacity of spikelet number in the conducting tissue. ②Being the same as check bundle in the primary branch of the basi-panicle of IHR with poor GP was superior to that of the top-panicle, but the transected area of the phloem of each large bundle in the basi-panicle was smaller than that in the top-panicle ③The large bundle number in the lower elongated internode of IHR were more than that in the upper elongated one, being the same as intervariety hybrids, but reverse to conventional rice.
出处
《湖北农学院学报》
1992年第2期7-11,共5页
Journal of Hubei Agricultural College
关键词
稻
杂交稻
维管束性状
籽粒充实度
intersubspecific hybrid rice
characters of bundle
grain plumpness
capacity of bundle
