Taxonomic uncertainties of rare species often hinder effective prioritization for conservation.One such taxonomic uncertainty is the 90-year-old enigma of Fagus chienii.F.chienii was previously only known from the typ...Taxonomic uncertainties of rare species often hinder effective prioritization for conservation.One such taxonomic uncertainty is the 90-year-old enigma of Fagus chienii.F.chienii was previously only known from the type specimens collected in 1935 in Pingwu County of Sichuan Province,China,and has long been thought to be on the verge of extinction.However,morphological similarities to closely related Fagus species have led many to question the taxonomic status of F.chienii.To clarify this taxonomic uncertainty,we used the newly collected samples to reconstruct a molecular phylogeny of Chinese Fagus species against the phylogenetic backbone of the whole genus using seven nuclear genes.In addition,we examined nine morphological characters to determine whether F.chienii is morphologically distinct from its putatively closest relatives(F.hayatae,F.longipetiolata,and F.lucida).Both morphological and phylogenetic analyses indicated that F.chienii is conspecific with F.hayatae.We recommended that F.chienii should not be treated as a separate species in conservation management.However,conservation strategies such as in situ protection and ex situ germplasm preservation should be adopted to prevent the peculiar“F.chienii”population from extinction.展开更多
以福建省淋漓锥[Castanopsis uraiana(Hayata)Kanehira et Hatusima]种子为研究对象,研究不同贮种方法和处理对种子萌发的影响,观察记录苗木生长过程的变化。研究表明,自然干燥储藏的种子直接播种出苗率仅为5%;自然干燥储藏,播种前温水...以福建省淋漓锥[Castanopsis uraiana(Hayata)Kanehira et Hatusima]种子为研究对象,研究不同贮种方法和处理对种子萌发的影响,观察记录苗木生长过程的变化。研究表明,自然干燥储藏的种子直接播种出苗率仅为5%;自然干燥储藏,播种前温水浸种24 h后播种的种子出苗率为21%;沙藏的种子出苗率则高达92%。沙藏下的淋漓锥种子出苗率最高。展开更多
基金supported by grants from the National Natural Science Foundation of China(No.31770236)the Guangxi Key Research and Development Projects(Guike AB21220057)Training Program for Academic and Technical Leaders(leading talents)in Major Disciplines of Jiangxi Province(grant to Zhiyong Zhang,20213BCJ22006)。
文摘Taxonomic uncertainties of rare species often hinder effective prioritization for conservation.One such taxonomic uncertainty is the 90-year-old enigma of Fagus chienii.F.chienii was previously only known from the type specimens collected in 1935 in Pingwu County of Sichuan Province,China,and has long been thought to be on the verge of extinction.However,morphological similarities to closely related Fagus species have led many to question the taxonomic status of F.chienii.To clarify this taxonomic uncertainty,we used the newly collected samples to reconstruct a molecular phylogeny of Chinese Fagus species against the phylogenetic backbone of the whole genus using seven nuclear genes.In addition,we examined nine morphological characters to determine whether F.chienii is morphologically distinct from its putatively closest relatives(F.hayatae,F.longipetiolata,and F.lucida).Both morphological and phylogenetic analyses indicated that F.chienii is conspecific with F.hayatae.We recommended that F.chienii should not be treated as a separate species in conservation management.However,conservation strategies such as in situ protection and ex situ germplasm preservation should be adopted to prevent the peculiar“F.chienii”population from extinction.
文摘以福建省淋漓锥[Castanopsis uraiana(Hayata)Kanehira et Hatusima]种子为研究对象,研究不同贮种方法和处理对种子萌发的影响,观察记录苗木生长过程的变化。研究表明,自然干燥储藏的种子直接播种出苗率仅为5%;自然干燥储藏,播种前温水浸种24 h后播种的种子出苗率为21%;沙藏的种子出苗率则高达92%。沙藏下的淋漓锥种子出苗率最高。
