Presence and Behaviour of B-Chromosomes in Acanthophyllum Laxiusculum (Caryophyllaceae)

Authors: Ghaffari S.M.¹; Bidmeshkipoor A.²

Source: Genetica, Volume 115, Number 3, August 2002 , pp. 319-323(5)

Publisher: Springer

Abstract:

Two karyotypic variants were recognized in populations of Acanthophyllum laxiusculum Schiman-Czeika. Variant A had 2N = 30 and variant B showed the presence of 0 to 3 B-chromosomes in addition to 2N = 30 chromosomes. Analysis of chromosome behaviour at meiosis showed that the presence of B-chromosomes increases chiasma frequency in A-chromosomes; this effect was higher for plants with odd numbers of B-chromosomes compared with plants with even numbers of B-chromosomes. Comparisons of variants A and B, suggests that B-chromosomes have an effect pollen stainability and seed production. It seems that the presence of B-chromosomes may increase pollen stainability and seed production in variant B.

Keywords: Acanthophyllum laxiusculum; B-chromosome; Caryophyllaceae; chiasma frequency; pollen stainability; seed set

Language: English

Document Type: Research article

Affiliations: 1: Institute of Biochemistry & Biophysics, University of Tehran, P.O. Box 13145-1384, Tehran, Iran (Phone: 21 640 9517; Fax: 21 640 4680) 2: Department of Biology, Faculty of Science, University of Razi, Kermansha, Iran

Publication date: 2002-08-01

• In this: publication
• By this: publisher
• In this Subject: Pathology ,  Genetics
• By this author: Ghaffari S.M. ;  Bidmeshkipoor A.

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