棉花温敏雄性不育系特棉S-1的形态学和细胞学特征研究

 以温敏雄性不育系特棉S-1及其正常可育品种D7为实验材料，对其形态学、细胞学特征进行了深入、系统的研究。结果表明：形态学研究发现，温敏雄性不育系特棉S-1的花器官明显较对照小，但是其它形态学特征差异很少；细胞学研究发现，特棉S-1败育主要发生在四分体形成期，花粉母细胞退化、花粉母细胞无荚膜、四分体质核分裂不同步、多分孢子、花粉粒畸形、花粉粒粘连、绒毡层提前解体及药隔组织薄壁细胞的退化等为棉花温敏雄性不育系特棉S-1的细胞学败育特征。

Studies on Morphological and Cytological Features of Thermo-sensitive Sterile Line Temian S-1 (Gossypium Hirsutum)

The thermo-sensitive male sterility and comparative line D7 were used as materials,and systemic studies on morphological and cytological characteristics were included in the paper.The main results are as follows:the floral apparatus of Temian S-1 is significantly smaller than that of D7,but all other morphological features of them are almost same.The results of cytological studies showed that the anther abortion of Temian S-1 occurred during the stage of tetrad formation,and the abortion has following characteristics:degenerative PMC,PMC without capsule,non-synchronous division of nucleolus and cytoplasm,multiple spores,abnormal pollen grains,linked pollen grains and dissolved tapetum.