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J Phycol. 2009 Dec;45(6):1310-4. doi: 10.1111/j.1529-8817.2009.00744.x. Epub 2009 Sep 29.

IDENTIFICATION OF THE MINUS MATING-TYPE SPECIFIC GENE MTD1 FROM GONIUM PECTORALE (VOLVOCALES, CHLOROPHYTA)(1).

Author information

1
Department of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, JapanPlant Biology Laboratory, Salk Institute, La Jolla, California 92037, USAAdvanced Science Institute, RIKEN, Wako-shi, Saitama 351-0198, JapanDepartment of Biological Sciences, Graduate School of Science, University of Tokyo, Tokyo 113-0033, Japan.

Abstract

Gonium pectorale O. F. Müll. (Volvocales, Chlorophyta), a colonial 8- or 16-cellular alga, is phylogenetically important as an intermediate form between isogametic unicellular Chlamydomonas and oogamous Volvox. We identified the mating-type specific gene GpMTD1, from G. pectorale, the first homologue of Chlamydomonas reinhardtii MTD1 (CrMTD1). The GpMTD1 gene was found to be present only in the minus mating-type locus and was expressed specifically in the gametic phase as is the case for CrMTD1, suggested to participate in development of the minus gametes. This gene is useful as a probe in analyzing the bacterial artificial chromosome (BAC) library for resolving genomic structures of the mating-type loci in isogamous and oogamous colonial volvocaleans.

KEYWORDS:

Gonium pectorale; MID; MTD1; Volvocales; evolution; mating-type locus; sex determination

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