矮秆体细胞变异体及其在水稻育种中的应用

 以高秆大穗型水稻品种中花8号、中花10号为材料，在其幼穗体细胞无性系变异中，出现了许多矮秆变异体，试验表明这种变异体的株高性状在遗传上是稳定的，它们的大穗、大粒高产特性，随着株高的降低，千粒重、穗粒数等农艺性状也有所降低，从而会导致产量的变化。但也可从中选到植株较矮，产量和原种对照相近的矮秆变异系。

SEMI-DWARF SOMACLONAL VARIANT AND ITS APPLICATION IN RICE BREEDING

Many semi-dwarf somaclonal variants have emerged from tissue cultures of immature inflorescences of good Japonica rice eultivar Zhonghua No. 8 and No.10. These short-culm variants are genetically stable. Besides the variation in plant height, other important agronomic characters, such as thousand-grain weight, grain number perpanicle etc, were also changed, which, in many cases, led up to yield changes compared with the original cultivars. However, some semi-dwarf variants selected do have a yielding capacity compared with the original cultivars.