Cytological, Morphological, Genetic, and Molecular Phylogenetic Studies on Intraspecific Differentiations within Diplazium doederleinii (Woodsiaceae: Pteridophyta)

Autor:	Masayuki Takamiya, Yoko Yatabe, Noriaki Murakami, Noriko Ohta
Rok vydání:	2001
Předmět:	Diplazium doederleinii Woodsiaceae biology Apomixis Botany Nucleic acid sequence Diplazium Chromosome Plant Science Evergreen biology.organism_classification Ecology Evolution Behavior and Systematics Intraspecific competition
Zdroj:	International Journal of Plant Sciences. 162:625-636
ISSN:	1537-5315 1058-5893
DOI:	10.1086/320144
Popis:	Two cytotypes, an apomictic triploid (2n=123) and an apomictic tetraploid (2n=164), were found in Japanese Diplazium doederleinii. The cytotypes are clearly distinguishable from each other in phytogeographical, ecological, and morphological characteristics. The tetraploid is smaller in relation to several morphological characteristics and occurs in more northerly regions than the triploid. The distributions of the two cytotypes do not overlap. The leaves of the triploids are evergreen, while those of the tetraploids are summer‐green. Allozyme analysis indicated that one and four multilocus genotypes are contained in the tetraploid and triploid, respectively. The nucleotide sequence of the rbcL gene did not vary within the same cytotype, except for a single triploid with the same rbcL sequence as the tetraploid. There are only two nucleotide differences between the triploid and tetraploid races. These results indicate that the apomictic triploids are of recurrent origin from an undiscovered or extinct ance...
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::3d8e35a51d4aa7282d760aa894fb14d9 https://doi.org/10.1086/320144 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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