Abstract
A cytogenetic investigation on male and female reproductive cells of Aglaothamnion oosumiense Itono indicates that the sexuality of this species might be determined by a sex chromosome. Chromosome counts in female and male gametophytes gave 37 and 36, respectively. Sex ratio of gametophytes was 1:1. Both male-derived and female-derived bisexual plants were observed. Bisexual plants were different in gross morphology and position of carpogonial branches from normal unisexual gametophytes. The chromosome number of female-derived bisexual plants was N = 37 and male-derived bisexual plants was N = 36. Some male plants developed parasporangia in addition. The paraspore germlings showed the same chromosome number as the male plants. The fertilized carpogonium and gonimoblast cells had 2N = ca. 70 chromosomes.
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Kim, G.H., Chah, OK., Lee, I.K. (2004). Karyology and sex determination in Aglaothamnion oosumiense Itono (Ceramiaceae, Rhodophyta). In: Ang, P.O. (eds) Asian Pacific Phycology in the 21st Century: Prospects and Challenges. Developments in Hydrobiology, vol 173. Springer, Dordrecht. https://doi.org/10.1007/978-94-007-0944-7_21
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DOI: https://doi.org/10.1007/978-94-007-0944-7_21
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