Evidence of genetic influence on the flowering pattern of Ficus microcarpa
Evidence of genetic influence on the flowering pattern of Ficus microcarpa
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DOI：
10.1016/j.actao.2013.12.004
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发表时间：
2014-05-01
影响因子：
1.8
通讯作者：
Kjellberg, Finn
中科院分区：
文献类型：
--
作者：
Yang, Hui-Wen;Bain, Anthony;Kjellberg, Finn
开花模式是遗传和环境因素相互作用的结果。虽然商业植物开花时间变化的遗传基础通常是很好的理解，很少有研究已经进行了调查，这些模式在植物没有经济意义。小叶榕是一种常见的园艺无花果树。隐果发育的不同步性和作物的开始、频率和大小可能影响其适合度以及与其传粉小蜂的互利共生的成功。为了明确小果桉开花性状的遗传决定模式，对台北市沿着街道近距离生长的28株小果桉开花性状进行了为期14个月的调查。每周对春、夏两季作物的株数、每分支的隐孢子虫数、植株密度、开花时间和种子发育期等7个性状进行调查。在微卫星位点的普查后基因分型区分16个遗传组（5个克隆组和11个非克隆树）。除种子发育期外，所有作物性状在不同基因型组间的变异均高于组内变异。我们没有发现相邻效应或开花性状的空间自相关的证据。这项研究提供了第一个证据，证明一种榕树的开花模式存在遗传变异。这些发现提供了深入了解适应性的特点，可能有助于当地建立F。在新的地点。(c)2013年Elsevier Masson SAS。All rights reserved.
Flowering patterns result from the interactions between genetic and environmental factors. While the genetic basis for flowering time variation in commercial plants is often well understood, few studies have been conducted to investigate these patterns in plants without economic importance. Ficus microcarpa is a commonly introduced horticultural fig tree. Asynchrony in syconium development and the initiation, frequency, and size of crops may affect its fitness as well as the success of mutualism with its pollinating wasps. In order to identify genetically determined patterns in the flowering traits in E microcarpa, a 14-month census was taken on the flowering characteristics of 28 trees growing in close proximity along an urban street in Taipei, Taiwan. Weekly surveys were taken on 7 characteristics: crop number, syconia per branch, crop asynchrony, as well as flowering onset and seed development duration for both the spring and summer crops. Post-census genotyping at microsatellite loci distinguished 16 genetic groups (5 clonal groups and 11 non-clone trees). All crop characteristics presented higher variation across different genotype groups than within groups except for seed development duration. We found no evidence of adjacency effects or spatial auto-correlation of flowering traits. The study offers the first evidence of genetic variations in the flowering patterns in a species of Ficus. These findings lend insight into the adaptive characteristics that potentially facilitate the local establishment of F. microcarpa in new locations. (c) 2013 Elsevier Masson SAS. All rights reserved.