玉米EC系列姊妹系的交配效应研究

本文探讨了EC系列姊妹系的交配效应。结果表明,EC系列姊妹系在单株粒重及其它农艺性状上,既有一定的差异,同时也保持了一定程度的相似性。用姊妹系组配成姊妹姝种,其生产力得到某种程度的恢复,单株粒重及其它农艺性状资普遍表现出优势,单株粒重优势尤其突出,产种量大大提高。用姊妹系组配的单交种之间、改良单交种之间的单株粒重及其它农艺性状呈现显著差异。姊妹种与改良单交种单株粒重相关不显著,单交种与改良单交种的单株粒重相关显著。

INVESTIGATION ON MATING EFFECTS OF SISTER LINES OF EC SERIES IN CORN

It was observed that the grain weight per plant and other agronomic characters were highly similar, but also rather different among the sister lines of EC series. The sister hybrids from mating these sister lines appeared generally heterosis on the grain weight per plant and other agronomic characters, and partly restored their viabilities. But the coefficient of correlation between the sister hybrids and the improved single crosses was not significant statistically with respect to the grain yield per plant.