Occurrence and Meiotic Behaviour of B Chromosomes in Digitaria
1968 年 33 巻 3-4 号 p. 539-544
詳細
1968 年 33 巻 3-4 号 p. 539-544
Occurrence of B chromosomes in three accessions of Digitaria has been reported. This is the first report of its kind in the genus Digitaria. Their morphology at pachytene and behaviour at meiosis have been studied in detail. B chromosomes found in all these accessions were heterochromatic, shorter than the shortest chromosome of the A complement and varied in size. It is suggested that these chromosomes in the genus Digitaria have arisen as a result of fragmentation of heterochromatic segments from the A chromosomes.
