Two new Fagopyrum (Polygonaceae) species, F. gracilipedoides and F. jinshaense from Yunnan, China
スポンサーリンク
概要
- 論文の詳細を見る
Two new Fagopyrum (Polygonaceae) species, F. gracilipedoides and F. jinshaense, are described. Fagopyrum gracilipedoides was only found at Baoshan village, Lijiang district, Yunnan province, China. This species resembles the weedy species, F. gracilipes in morphology but they differ in both mating system and ploidy level; F. gracilipedoides is a heterostylous self-incompatible diploid species (2n = 16), whereas F. gracilipes is a self-compatible tetraploid species (2n = 32). Fagopyrum jinshaense was found along the Jinsha River valley near the border of Sichuan, Yunnan, and Tibet in China. Fagopyrum jinshaense is morphologically similar to F. gilesii, but they differ in the morphology of their inflorescences. Fagopyrum jinshaense has long spike-like inflorescences, whereas F. gilesii has a compact head-like one. Both F. jinshaense and F. gilesii are self-incompatible with heterostylous flowers and are diploid. Interspecific crosses between the two new species and already known species in the urophyllum group of Fagopyrum resulted in the production of self- and cross-sterile hybrids in the species combinations attempted. These results indicated that both new species are reproductively isolated from other Fagopyrum species. Molecular phylogenetic analysis based on the nucleotide sequence of the trnK gene intron in chloroplast DNA revealed the following points: 1) F. gracilipedoides <sc>, </sc>F. rubifolium and F. gracilipes / F. capillatum showed a trifurcating relationship and 2) F. jinshaense formed a clade with F. pleioramosum, F. callanthum, and F. macrocarpum, and was only distantly related to F. gilesii. In the clade of F. capillatum, F. gracilipes, F. gracilipedoides and F. rubifolium, the breakdown of self-incompatibility accompanying genome duplication seems to have occurred twice independently.
- 日本遺伝学会の論文
- 2002-12-01
著者
-
Ohnishi Ohmi
Plant Germ Plasm Institute Graduate School Of Agriculture Kyoto University
-
Yamane Kyoko
Plant Germ-plasm Institute Graduate School Of Agriculture Kyoto University
-
OHSAKO Takanori
Faculty of Engineering, Kyoto Sangyo University
-
Ohsako Takanori
Faculty Of Engineering Kyoto Sangyo University
関連論文
- Topological incongruence between nuclear and chloroplast DNA trees suggesting hybridization in the urophyllum group of the genus Fagopyrum (Polygonaceae)
- Two new Fagopyrum (Polygonaceae) species, F. gracilipedoides and F. jinshaense from Yunnan, China
- New Fagopyrum species revealed by morphological and molecular analyses
- Allozyme diversity and population structure of Japanese and Korean populations of wild radish, Raphanus sativus var. hortensis f. raphanistroides (Brassicaceae)
- Phylogenetic relationships among Fagopyrum species revealed by the nucleotide sequences of the ITS region of the nuclear rRNA gene
- Genetic diversity of cultivated and wild radish and phylogenetic relationships among Raphanus and Brassica species revealed by the analysis of trnK/matK sequence
- Geographic Differentiation of Morphological Characters among Perilla Crops and Their Weedy Types in East Asia
- Chlorophyll-deficient and several morphological genes concealed in Japanese natural populations of wild radish, Raphanus sativus var. hortensis f. raphanistroides
- Genetic relationships among two Perilla crops, shiso and egoma, and the weedy type revealed by RAPD markers
- Two distinct groups of natural populations of Fagopyrum urophyllum (Bur. et Franch.) Gross revealed by the nucleotide sequence of a noncoding region in chloroplast DNA
- Genetic Diversity and Genetic Relationships of East Asian Natural Populations of Wild Radish Revealed by AFLP
- Nucleotide sequence variation of the chloroplast trnK/matK region in two wild Fagopyrum (Polygonaceae) species, F. leptopodum and F. statice.
- Population genetics of cultivated common buckwheat, Fagopyrum esculentum Moench. X. Diffusion routes revealed by RAPD markers
- Search for the wild ancestor of buckwheat II. Taxonomy of Fagopyrum(Polygonaceae)species based on morphology, isozymes and cpDNA variability
- Comparative study of rbcL gene sequences in Fagopyrum and related taxa