Abstract: The morphological and cytological feature of Sc2053 induced male sterility in wheat (Triticurn uestivum L. )was studied systematically. The morphological feature of sterile plants was as follows:(1)the plant height became low; (2)the plants and spikes were light green in colour; (3)the spike expanded; (4)the anther was not open. Based on the above feature,the absolute degree of sterility which was suggested to measure the effect of chemical hybridizing agents on inducing male sterility among plants within wheat population,could be counted. Two types of anther and pollen development were found after the treatment with Sc2053:anther without pollen and with abortive pollen respectively. The reason for former case was that the microspore aborted just after the meiosis. The latter type means that microspore developed only to the single-celled pollen, or the two-celled pollen, or the innormal three-celled pollen, or pollen without protoplast. And also the development of the pollen in different pollen sac of an anther was not synchronistic. However,the development of the pollen sac wall was normal in all cases.

Key words: Wheat, Male sterility, Sterile absolute degree, Non-pollen type, Abortive pollen type, Chemical hybridizing agents

CLC Number: 

• S512.101