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Updated: 16-10-14 | ||||
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MOLECULAR EVIDENCE FOR NATURAL HYBRIDIZATION IN THE MANGROVE GENUS AVICENNIA
LISHI HUANG, XINNIAN LI, YELIN HUANG, SUHUA SHI AND RENCHAO ZHOU*
Abstract: Hybridization has been observed in several multi-species genera of mangroves; however, there has been no report on hybridization in Avicennia in the Indo-West Pacific region. In this study, we sequenced 5 low-copy nuclear genes of Avicennia marina, A. rumphiana and 2 individuals of their putative hybrid in the Southeast Asia region to test the hypothesis of natural hybridization between these 2 species. We demonstrated that both putative hybrid individuals possessed two types of sequences at each of the 5 genes, perfectly corresponding to those of A. marina and A. rumphiana, confirming the hybridization between these 2 Avicennia species, and the 2 hybrid individuals are most likely F1 hybrids. Sequencing of the chloroplast trnH-psbA regions indicated that A. marina was the maternal parent of the two hybrid individuals.
Key words: Avicennia, chloroplast DNA, Mangroves, Natural hybridization, Nuclear gene.
State Key Laboratory of Biocontrol and Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275, China *Corresponding author’s e-mail: zhrench@mail.sysu.edu.cn; Tel: 86 20 84113677; Fax: 86 20 34022356 |
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