野生稻光周期反应研究

STUDIES ON PHOTOPERIODICAL RESPONSE OF WILD RICES

对稻属不同种及部分中国普通野生稻的光周期反应进行了比较研究，结果表明供试材料在短日下能提早抽穗，它们对短日诱导的敏感程度与染色体组有一定关系，AA染色体组的稻种，其光周期反应呈明显的多样性；中国东乡、茶陵、江永、仁化普通野生稻短日性强弱不同，与地理分布有关，即分布纬度较高的类型感光性较弱。另外还对群体内光周期反应差异及苗龄效应也作了研究。

The photoperiodical response of specie3 in Oryza and some populations ofChinese common wild rice (Oryza ruAsogco Griff. in China) were studied comparativelyin this paper. The results showed that experimental materials can early heading after short-day treatment. There were some relation between their senstive degree to the induce of short--day and chromosome set. The species of AA chromosome set had obviously different response to photoperiod. The different degrees of response to short-day among Dongxiang,Chalin,Jiangyong and Renhua wild rices (O, rufipogon Griff. in China) have relative to do with their different geographical distribution,namely those which were at higher altitude had lower degree of response to short-day. On the other hand,we also did some studies on the difference of photoperiodical reaction in population and leaf stage effects.