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Chromosomal pairing and pollen viability in Rhizophora mangl and Rhizophora stylosa hybrids

Tyagi, Anand P. (2002) Chromosomal pairing and pollen viability in Rhizophora mangl and Rhizophora stylosa hybrids. The South Pacific Journal of Natural Sciences, 20 (1). pp. 1-3. ISSN 1013-9877

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Abstract

Two prominent mangrove species of Fiji, Rhizophora mangle, Linn. Rhizophora stylosa Griff and their puative hyubrid (R x selala) were analysed for chromosome number and pairing. Both parental species and their hybrid possess a diploid number of (2n) = 36 chromosomes. Regular 18 bivalents were observed in two species but the hybrid lacked proper chromosome pairing during meiosis. Analysis of tetrads showed normal tetrad and microspores development in parental species but very high abnormality in the hybrid. Pollen fertility determined by staining technique and pollen germination technique showed very high pollen viability in both parental species but very low pollen viability in the putative hybrid. Lack of chromosomal homology appears to be contributing to high percentage of non-viable pollen resulting in complete sterility in the putative hybrid.

Item Type: Journal Article
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions: Faculty of Science, Technology and Environment (FSTE) > School of Biological and Chemical Sciences
Depositing User: Ms Neha Harakh
Date Deposited: 17 Nov 2002 12:59
Last Modified: 18 Jul 2012 21:03
URI: http://repository.usp.ac.fj/id/eprint/2710
UNSPECIFIED

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