Cytological and Reproductive Studies on Japanese Diplazium (Woodsiaceae; Pteridophyta): Apomictic Reproduction in Diplazium with Evergreen Bi- to Tripinnate Leaves
Cytological and Reproductive Studies on Japanese Diplazium (Woodsiaceae; Pteridophyta): Apomictic Reproduction in Diplazium with Evergreen Bi- to Tripinnate Leaves
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日本 Diplazium（木木科；蕨类植物）的细胞学和生殖研究：具有常绿二羽至三羽状叶的 Diplazium 的无融合生殖
DOI：
10.1007/pl00013897
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发表时间：
1999
影响因子：
2.8
通讯作者：
N. Ohta
中科院分区：
文献类型：
--
作者：
M. Takamiya;Chikako Takaoka;N. Ohta
双盖蕨属，包括具万年青二回至三回羽状复叶的多形陆生种。virescensvar.virescens，var.conterminum，var.okinawaense和另外两个未命名的变种D. kawakamiivar.异鳞藓D. taiwanense，川鄂盾蚧D. takii（=D. hachijoense×virescensvar.virescens）和D.× nakamurae（= D. hachijoense× virescensvar.conterminum）为无融合生殖三倍体（2n=n=123）。小鳞双盖蕨为有性二倍体（2n=82，n=41），亚三羽双盖蕨为有性四倍体（2n= 164，n=82）。二倍体包括有性二倍体和无融合生殖的三倍体群体。培养的6个三倍体类群的配子体产生孢子体无配子生殖，证实他们的无融合生殖。所有三个假定的杂种，D.× kawabalae，D.×takii和D.×nakamurae，都是三倍体，无融合生殖和可育的分类群，因此它们不是已知的日本Diplazium植物对之间杂交的结果。
Diplazium, including polymorphic terrestrial species with evergreen bi- to tripinnate leaves.Diplazium hachijoense, D. virescensvar.virescens, var.conterminum, var.okinawaense, and two other unnamed varieties,D. kawakamiivar.kawakamii, D. dilatatumvar.heterolepia, D. taiwanense, D.×kawabatae(=D. dilatatum×taiwanense),D.×takii(=D. hachijoense×virescensvar.virescens), andD.× nakamurae(= D. hachijoense×virescensvar.conterminum) are apomictic triploids (2n=n=123).Diplazium amamianumandD. esculentumare sexual diploids (2n=82,n=41) and D.subtripinnatumis a sexual tetraploid (2n= 164,n=82).Diplazium dilatatumvar. dilatatumincludes both sexual diploid and apomictic triploid populations. Cultivated gametophytes of six triploid taxa produced sporophytes apogamously, confirming their apomictic reproduction. All three putative hybrids,D.×kawabatae, D.×takii, andD.×nakamurae, are triploid, apomictic, and fertile taxa, therefore they are not the result of hybridization between known pairs of JapaneseDiplaziumplants.