核型高梁雄性不育自然突变体的研究

本文对多穗高梁自然突变体(多A)进行了细胞学、遗传学和同工酶电泳的分析研究,取得以下结果: “多A”雄性不育性状由一对细胞核隐性等位基因控制,它与核、质型雄性不育系(3A)之间未发现有亲缘关系。染色体行为在减数分裂过程中有数目不等的不联会、早离及落后现象发生,正常染色体数目为n=10。“多A”不育花粉单核期的过氧化物同工酶为11条带,“多B”可育花粉为8条带。三核期的花粉,“多A”为7条带,“多B”为5条带。

A STUDY ON SPONTANEOUS MUTANT OF NUCLEO-MALE-STERILITY IN SORGHUM

This paper presents the results of genetical and cytological analysis and identification of peroxidase isozyme by electrophoresis in a spontaneous mutant(Multiple-A) derived from a veriety Multiple-tillering Sorghum.The inheritance of male sterile character of Multiple-A is controlled by a pair of recessive allele, the Multiple-A has no relationship to nuclear-cytoplasmic form of sterile line(3197A). During the meiosis the chromosomal behaviour was in abnormality of chromosomal number, asynapsis, earlier disjunction and delay of chromosome in a few cells. The normal number of chromosome is n=10.The isozyme pattern of peroxidase in uninucleate pollens was characterized. It was found that there were eleven bands in the sample of sterile pollens of "Multiple-A" and eight bands in that of "Multiple-B" during uninucleate phase of developing pollens. But up to the trinucleate phase of developing pollens, seven bands could be found in "Multiple-A" and only five bands remained in "Multiple-B".