Geographic variation in seedling morphology of Casuarina equisetifolia subsp equisetifolia (Casuarinaceae)
Geographic variation in seedling morphology of Casuarina equisetifolia subsp equisetifolia (Casuarinaceae)
复制标题
木麻黄幼苗形态的地理变异。
DOI：
10.1071/bt15049
复制
发表时间：
2016-01-01
影响因子：
1.1
通讯作者：
Bush, David
中科院分区：
文献类型：
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作者：
Hu, Pan;Zhong, Chonglu;Bush, David
对木麻黄亚种28个自然种源和引种居群的种子进行了研究。以大洋洲、亚洲和非洲的木贼叶苗木为研究对象，研究了木贼叶苗木生长形态的地理差异。对每棵幼苗进行了与生长和分枝习性有关的10个特征测量，并对所得数据进行了单变量和多变量分析。总的来说，大洋洲的幼苗生长更慢，分枝更密，分枝细而直立，每轮齿数比其他地区的少。聚类分析有效地分离了大洋洲和亚洲的自然种源，揭示了亚洲和非洲不同地区引种的可能原始来源。为了更好地了解遗传关系，提高对这一重要木麻黄物种的更有效利用，有必要通过对所有主要分布区域遗传物质的分子特征来进一步研究变异模式。
Seeds collected from 28 natural provenances and introduced populations of Casuarina equisetifolia subsp. equisetifolia L. from Oceania, Asia and Africa were used to study geographic variation in growth and morphology of nursery-grown seedlings. Ten characteristics related to growth and branching habit were measured for each seedling and the resultant data subjected to univariate and multivariate analyses. In general, seedlings from Oceania grew more slowly, were more densely branched with fine and upright branching, and had fewer teeth per whorl than those from other areas. Cluster analysis effectively separated Oceania from Asian natural provenances, and revealed the probable original sources of introductions to different parts of Asia and Africa. Further investigation into the pattern of variation through molecular characterisation of genetic material from all major regions of distribution is warranted in order to better understand the genetic relationships and enhance more efficient utilisation of this important casuarina species.