论文部分内容阅读
观察了广陆矮4号和南京11号花粉母细胞形成后的细胞学行为,发现水稻减数分裂后的幼穗分化进度与颖花长度(L)关系密切,在同一品种内这种关系不因花位(强、弱势)的不同而有所改变。考虑到品种间最终颖花长度(Lfi.)存在差异,故不同品种间比较时可引入颖花伸长度(即伸长百分率,L%)的概念。显著性测验证明,在减数分裂期间,颖花长度和颖花伸长度与分化进程之间的关系在不同品种间差异显著,故难以取得品种间分化进度的一般性诊断指标。但进入小孢子发育阶段(即第一次收缩)后 t 值明显缩小,尤以颖花伸长度为甚,故对后期诊断第一收缩期,单核靠边期和双核期有一定应用价值。
The cytological behaviors of pollen mother cells from Guanglu Dian 4 and Nanjing 11 were observed. The results showed that the progress of spike differentiation of rice after meiosis was closely related to the length of spikelet (L), and this relationship was not within the same variety Due to flower spaces (strong, weak) different and have changed. Considering the differences in the final length of spikelets (Lfi.) Between cultivars, the concept of elongation (ie% elongation, L%) can be introduced when comparing between varieties. Significant tests showed that during the meiosis, the relationship between the length of spikelets and the elongation of spikelets was significantly different among different cultivars, which made it difficult to obtain general diagnostic indicators for the progress of differentiation among varieties. However, after entering the microspore stage of development (ie, the first contraction) t value significantly reduced, especially in the spike elongation is very small, so the diagnosis of the first systolic, mononuclear margin and binuclear phase of a certain value.