Hybridization involving independent gametophytes in the Vandenboschia radicans complex (Hymenophyllaceae): a new perspective on the distribution of fern hybrids
Hybridization involving independent gametophytes in the Vandenboschia radicans complex (Hymenophyllaceae): a new perspective on the distribution of fern hybrids
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DOI：
10.1111/j.1365-294x.2009.04406.x
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发表时间：
2009-12-01
影响因子：
4.9
通讯作者：
Ito, Motomi
中科院分区：
文献类型：
--
作者：
Ebihara, Atsushi;Matsumoto, Sadamu;Ito, Motomi
为了检验我们关于蕨类植物中涉及“独立配子体”现象的杂交形成的假设，我们鉴定了孢子体群体外围的 Vandenboschia radicans 复合体的配子体的基因组公式和倍性水平。我们在缺乏可育非杂交个体的日本杂交孢子体种群中鉴定了 V. kalamocarpa（V.xstenosiphon 的两个推定亲本之一）的单倍体配子体。此外，在50公里半径内未发现该物种的二倍体孢子体。这一发现支持了涉及“独立配子体”现象的杂交假说，并为蕨类杂种的地理分布提供了新的视角。
To test our hypothesis of hybrid formation involving the 'independent gametophyte' phenomenon in ferns, we identified the genomic formulae and ploidy level of gametophytes of the Vandenboschia radicans complex at the periphery of a sporophyte population. We identified haploid gametophytes of V. kalamocarpa (one of the two putative parents of V.xstenosiphon) in a hybrid sporophyte population in Japan that lacks fertile non-hybrid individuals. Furthermore, diploid sporophytes of the species were not found within a 50-km radius. This finding supports a hypothesis of hybridization involving the 'independent gametophyte' phenomenon and provides a new perspective on the geographical distribution of fern hybrids.