Abstract: The meiotic behavior and male gametes development in cytoplasmic male sterile lines (CMS) 21A and Jin A of hot and sweet pepper ( Capsicum annuum L. ) and their maintainer lines 21B and Jin B were studied in this paper. The results showed that microsporogenesis could process normally until former uni2nucleate pollen stage. There are not differences in the meiosis of both A lines and B lines , and between CMS of hot and sweet pepper. At metaphase I , the chromosome constitution was composed of nine ring bivalents and three rod bivalents. Equal chromosome divisions resulted in two poles with chromosome n=12 at anaphase I , and four poles at anaphaseII. After tetrad stage , uni-nucleate pollen underwent a progressive process of collapse , owing to being squeezed by bnormal swelled tapetal cells. Bi-ucleate pollen could not produce since the second pollen mitosis failed to occur ,and the gametes became completely sterile.

Key words: Pepper, Cytoplasmic male sterile, Meiosis, Male gametes development