TRANSMISSION AND SIGNIFICANCE OF B CHROMOSOMES IN ANTHURIUM WAROCQUEANUM
作者:
Mari Marutani,
Haruyuki Kamemoto,
期刊:
American Journal of Botany
(WILEY Available online 1983)
卷期:
Volume 70,
issue 1
页码: 40-46
ISSN:0002-9122
年代: 1983
DOI:10.1002/j.1537-2197.1983.tb12429.x
出版商: Wiley
数据来源: WILEY
摘要:
Somatic and meiotic chromosomes of one plant ofAnthurium warocqueanumJ. Moore and its selfed offspring were analyzed. The parent showed 2n =30 + 3B in both somatic cells and pollen mother cells. The B chromosomes divided normally in somatic cells, but meiotic associations of Bs varied. Three configurations of three B chromosomes were observed at metaphase I of parent meiosis: one trivalent, one bivalent and one univalent, or three univalents. The number of B chromosomes in offspring ranged from 0 to 6, indicating their transmission from both male and female gametes. Offspring with two B chromosomes appeared in greatest frequency. It was hypothesized that both male and female gametes of the 3 B parent frequently contained one B chromosome through the normal distribution of the bivalent Bs at meiosis and the elimination of the univalent B chromosome due to lagging. Examination of pollen mother cells of offspring also revealed irregular behavior of B chromosomes. With a high number of B chromosomes, normal A chromosome bivalent formation seemed to be reduced. No phenotypic effects of B chromosomes were observed.
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