Ecological speciation in sympatric palms: 2. Pre- and post-zygotic isolation.
Ecological speciation in sympatric palms: 2. Pre- and post-zygotic isolation.
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同胞棕榈中的生态形成：2。前后结肠分离。
DOI：
10.1111/jeb.12933
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发表时间：
2016-11
影响因子：
2.1
通讯作者：
Savolainen V
中科院分区：
文献类型：
--
作者：
Hipperson H;Dunning LT;Baker WJ;Butlin RK;Hutton I;Papadopulos AS;Smadja CM;Wilson TC;Devaux C;Savolainen V
我们评估了繁殖隔离在两个物种的棕榈树（Howea），共域发展豪勋爵岛（LHI，澳大利亚）。我们估计了一些前合子和后合子机制在维持当前物种边界方面的强度。我们发现，物种之间的开花时间位移是一致的，在和迁地常见的花园，因此部分遗传决定。在LHI上，仅由于开花移位导致的合子前隔离对于Howea belmoreana为97%，对于H. forsteriana为80%;这种不对称性是由于H. forsteriana开花早于H. belmoreana并且是雄性先熟的。正如预期的那样，只有少数杂交种（这里证实的基因分型）在少年和成年阶段可以检测到在两个网站上的LHI，其中两个物种生长混合（远平地）或相邻（过境山）。然而，杂交种的分布是不同的网站。在过境山，我们没有发现杂交成年树，但13.5%的年轻的棕榈树检查有后期杂交类。相比之下，我们发现四个混合成年树，大多是后期的混合班，只有一个少年F1杂种在远平原。这种模式表明，选择作用对杂种之间的少年和成年阶段。火山和石灰性土壤之间的原位相互种子移植也表明，早期健身组件（长达36个月）的物种和土壤的影响。这些结果表明，在生殖隔离的分歧选择，虽然它并不能完全解释目前的分布这两个物种的LHI。
We evaluated reproductive isolation in two species of palms (Howea) that have evolved sympatrically on Lord Howe Island (LHI, Australia). We estimated the strength of some pre‐ and post‐zygotic mechanisms in maintaining current species boundaries. We found that flowering time displacement between species is consistent across in and ex situ common gardens and is thus partly genetically determined. On LHI, pre‐zygotic isolation due solely to flowering displacement was 97% for Howea belmoreana and 80% for H. forsteriana; this asymmetry results from H. forsteriana flowering earlier than H. belmoreana and being protandrous. As expected, only a few hybrids (here confirmed by genotyping) at both juvenile and adult stages could be detected in two sites on LHI, in which the two species grow intermingled (the Far Flats) or adjacently (Transit Hill). Yet, the distribution of hybrids was different between sites. At Transit Hill, we found no hybrid adult trees, but 13.5% of younger palms examined there were of late hybrid classes. In contrast, we found four hybrid adult trees, mostly of late hybrid classes, and only one juvenile F1 hybrid in the Far Flats. This pattern indicates that selection acts against hybrids between the juvenile and adult stages. An in situ reciprocal seed transplant between volcanic and calcareous soils also shows that early fitness components (up to 36 months) were affected by species and soil. These results are indicative of divergent selection in reproductive isolation, although it does not solely explain the current distribution of the two species on LHI.
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影响因子：
3.7
作者：
Boyko A;Blevins T;Yao Y;Golubov A;Bilichak A;Ilnytskyy Y;Hollunder J;Meins F Jr;Kovalchuk I
通讯作者：
Kovalchuk I
影响因子：
2.1
作者：
Dunning LT;Hipperson H;Baker WJ;Butlin RK;Devaux C;Hutton I;Igea J;Papadopulos AS;Quan X;Smadja CM;Turnbull CG;Savolainen V
通讯作者：
Savolainen V
影响因子：
7
作者：
Martin SH;Dasmahapatra KK;Nadeau NJ;Salazar C;Walters JR;Simpson F;Blaxter M;Manica A;Mallet J;Jiggins CD
通讯作者：
Jiggins CD
影响因子：
4.9
作者：
Milne, Richard I.;Abbott, Richard J.
通讯作者：
Abbott, Richard J.
影响因子：
64.8
作者：
Arnegard, Matthew E.;McGee, Matthew D.;Matthews, Blake;Marchinko, Kerry B.;Conte, Gina L.;Kabir, Sahriar;Bedford, Nicole;Bergek, Sara;Chan, Yingguang Frank;Jones, Felicity C.;Kingsley, David M.;Peichel, Catherine L.;Schluter, Dolph
通讯作者：
Schluter, Dolph