扬州大学农学院水稻遗传育种课题组自1990年以来，在水稻花粉母细胞减数分裂粗线期染色体与根尖细胞有丝分裂前中期染色体制片技术及各别染色体的鉴别方面取得了重要进展。在此基础上，对栽培稻粗线期的核型及初级三体、端三体和次级三体等三期的枝型进行了系统的研究。水稻初 Since 1990, the research group of rice genetics and breeding of the Department of Rice Genetics and Breeding, Yangzhou University, has made important progress in the techniques of chromosome pre-mitosis and differential chromosome identification of the mitochondrial meiosis and root tip cells of rice pollen mother cells. On this basis, the karyotype of the cultivated rice in pachytene phase and the primary trisomies, end trisomy and secondary trisomy were studied systematically. Rice early