本文研究了我国原产的山茶属植物东兴金花茶(Camellia tunghinensis chang.)、平果金花茶(C.Pingguoensis D.Fang),毛籽金花茶(C.ptilos perma S.Y.Liang et Q.D.Chen)、凹脉金花茶(C.impressifZeruis Chang et S.Y.Liang)、金花茶(C.ch...本文研究了我国原产的山茶属植物东兴金花茶(Camellia tunghinensis chang.)、平果金花茶(C.Pingguoensis D.Fang),毛籽金花茶(C.ptilos perma S.Y.Liang et Q.D.Chen)、凹脉金花茶(C.impressifZeruis Chang et S.Y.Liang)、金花茶(C.chrgsantha(Hu)Tugama)、毛瓣金花茶(C.pubipetala Y.Wan et S.Z.Huang)、小果金花茶(C.chrgsantha var.microcarpa S.L.M et S.Z.Huang)、广宁红花油茶(C.semiserrata C.W.Chi)、苑田红花油茶(C.polyodonta Chun et How)、腾冲红花油茶(C.riticulata f.simplex)、五宝山茶(C.japonica L.‘Wabao’)、云南大叶茶(C.sinrnsis var macrophylla Sieb.)、共12个种、变种和品种的染色体数目。除腾冲红花油茶2n=90外,其余的2n=30,并研究了其中3个种、变种和品种的核型:毛瓣金花茶为2n=2x=30=26m(2SAT)+4sm;小果金花茶为2n=2x=30=24m(2SAT)+6sm,五宝山茶为2n=2x=30=24m(2SAT)+6sm(2SAT) 7个种、变种和品种的染色体数目和其中3个核型为首次报道。展开更多
The Hengduan Mountains region is a biodiversity hotspot. In this study, we report the karyotypes of 19 species(21 populations) of Asteraceae from this region, 14 of which are reported for the first time. We also exami...The Hengduan Mountains region is a biodiversity hotspot. In this study, we report the karyotypes of 19 species(21 populations) of Asteraceae from this region, 14 of which are reported for the first time. We also examined polyploidy in Asteraceae plants and summarized karyotype data in the literature for 69 congeneric taxa. In these genera, there were five different ploidy levels in the region, though the most dominant was diploid(73.08%). There is no direct evidence that ploidy level and karyotype asymmetry are associated with the distribution of recorded Asteraceae species from the Hengduan Mountains. This suggests that polyploidy(26.92%) may not play an important role in the evolutionary history of these plants, even though, among these genera, the ratio of paleopolyploidy was high(46.15%).展开更多
文摘本文研究了我国原产的山茶属植物东兴金花茶(Camellia tunghinensis chang.)、平果金花茶(C.Pingguoensis D.Fang),毛籽金花茶(C.ptilos perma S.Y.Liang et Q.D.Chen)、凹脉金花茶(C.impressifZeruis Chang et S.Y.Liang)、金花茶(C.chrgsantha(Hu)Tugama)、毛瓣金花茶(C.pubipetala Y.Wan et S.Z.Huang)、小果金花茶(C.chrgsantha var.microcarpa S.L.M et S.Z.Huang)、广宁红花油茶(C.semiserrata C.W.Chi)、苑田红花油茶(C.polyodonta Chun et How)、腾冲红花油茶(C.riticulata f.simplex)、五宝山茶(C.japonica L.‘Wabao’)、云南大叶茶(C.sinrnsis var macrophylla Sieb.)、共12个种、变种和品种的染色体数目。除腾冲红花油茶2n=90外,其余的2n=30,并研究了其中3个种、变种和品种的核型:毛瓣金花茶为2n=2x=30=26m(2SAT)+4sm;小果金花茶为2n=2x=30=24m(2SAT)+6sm,五宝山茶为2n=2x=30=24m(2SAT)+6sm(2SAT) 7个种、变种和品种的染色体数目和其中3个核型为首次报道。
基金supported by the National Natural Science Foundation of China (31670206, 31360049) to Zhi-Min Limajor Program of NSFC (grant 31590823, 31590820) to Hang Sun,NSFC (31370004, 31570213) to Jian-Wen Zhang
文摘The Hengduan Mountains region is a biodiversity hotspot. In this study, we report the karyotypes of 19 species(21 populations) of Asteraceae from this region, 14 of which are reported for the first time. We also examined polyploidy in Asteraceae plants and summarized karyotype data in the literature for 69 congeneric taxa. In these genera, there were five different ploidy levels in the region, though the most dominant was diploid(73.08%). There is no direct evidence that ploidy level and karyotype asymmetry are associated with the distribution of recorded Asteraceae species from the Hengduan Mountains. This suggests that polyploidy(26.92%) may not play an important role in the evolutionary history of these plants, even though, among these genera, the ratio of paleopolyploidy was high(46.15%).
