CHROMOSOMES OF PUSCHKINIA LIBANOTICA DURING MITOSIS

被引:20
作者
BARLOW, PW
VOSA, CG
机构
[1] Botany School, University of Oxford
[2] Paediatric Research Unit, Guy's Hospital Medical School, London
关键词
D O I
10.1007/BF00325681
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The chromosome complement of Puschkinia libanotica is described. In addition to five pairs of A chromosomes plants may possess up to 7 B chromosomes. Part of the long arm of the B chromosome gives rise to a heterochromatic mass in interphase nuclei and this can be seen to be a double structure in G1 nuclei and a quadruple structure in G2 nuclei. It is believed that these configurations represent the pre- and post-replication forms of subchromatids in the heterochromatic segment of the B chromosome. Microdensitometry of metaphase chromosomes shows that the segment of the B chromosome that is heterochromatic during interphase has no more DNA per unit volume than any of the euchromatic A chromosomes. © 1969 Springer-Verlag.
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页码:436 / &
相关论文
共 17 条
  • [1] BAJER A, 1965, CHROMOSOMA, V17, P291, DOI 10.1007/BF00348788
  • [2] BARLOW PW, 1968, HEREDITY, V23, P625
  • [3] BOYES JW, 1961, AM J HUM GENET, V13, P104
  • [4] Darlington C, 1936, CYTOLOGIA, V7, P248, DOI DOI 10.1508/CYT0L0GIA.7.248
  • [5] FERNANDES A., 1949, Boletim da Sociedade Broteriana, V23, P5
  • [6] FERNANDES A., 1948, BOL SOC BROTERIANA, V22, P119
  • [7] FERNANDES A, 1939, SCIENTIA GENETICA, V1, P141
  • [8] GERMAN J, 1964, CYTOGENETICS CELLS C, V3, P191
  • [9] HOLM G, 1966, HEREDITAS-GENETISK A, V54, P356
  • [10] JOHN B, 1968, PROTOPLASMATOLOGIA A, V6, P1