Dynamic chromosome morphology in meiosis of pollen mother cells of Brassica napus

摘要

B. napus is one of the most important oil producing crops in the world. Its cytological studies began since Morinaga (1934) first established its chromosome number (2n=38). A lot of evidence has showed that the chromosomes of B. napus are very smalland it is difficult to identify homologues and to distinguish between different pairs in the complement. Few studies have been made on the characterization of the chromosomes. No complete set of microscopic photographs and description has been availableon the dynamic chromosomal morphology in meiosis of pollen mother cells in B. napus. We present here a set of microscopic photographs to show the behavior of chromosomes and the pollen formation in meiotic process of B. napus.