Unravelling the genetic diversity and population structure of common walnut in the Iranian Plateau.
Unravelling the genetic diversity and population structure of common walnut in the Iranian Plateau.
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DOI：
10.1186/s12870-023-04190-2
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发表时间：
2023-04-18
影响因子：
5.3
通讯作者：
Liu J
中科院分区：
文献类型：
--
作者：
Shahi Shavvon R;Qi HL;Mafakheri M;Fan PZ;Wu HY;Bazdid Vahdati F;Al-Shmgani HS;Wang YH;Liu J
核桃（Juglans regia L.）它有着悠久的种植历史，因为它的木材非常珍贵，坚果营养丰富。伊朗高原被认为是最后一次冰川期的避难所之一，也是普通核桃的起源和驯化中心。然而，高原核桃遗传资源的保护和利用的前提是对遗传多样性进行全面的评价，而这方面的评价却明显不足。在这方面，我们使用了31个多态性简单序列重复（SSR）标记来描绘的27个居群中的508个核桃的遗传变异和群体结构。SSR标记表现出较高的遗传多样性（HO = 0.438，HE = 0.437）。居群间的遗传分化为中度（FST = 0.124），居群内的遗传变异（79%）显著超过居群间的遗传变异（21%）。基因流（Nm = 1.840）对核桃居群遗传结构有显著影响，这可能与人类活动和花粉风传播有关。结构分析将27个种群分为两个主要聚类。通过邻接树和主坐标树分析以及贝叶斯结构分析，揭示了居群划分与居群间亲缘关系的基本一致性。然而，一些地理上接近的种群分散到不同的集群中。此外，伊拉克苏莱曼尼亚（SMR）人口的遗传多样性低，需要通过繁殖和幼苗管理或组织培养方法进行紧急保护;此外，我们建议对伊朗的戈纳巴德（RGR）和阿拉克（AKR）人口进行不可或缺的保护。这些结果反映了整个高原的加入一致的高地理亲和力。我们的研究结果表明，基因流是一个驱动因素，影响核桃种群的遗传结构，而生态和地质变量并没有作为强大的障碍。此外，本文报道的数据提供了新的见解核桃种质资源的群体结构，这将有助于保护未来的遗传资源，从而提高核桃育种计划的效率。 在线版本包含补充材料，可通过10.1186/s12870-023-04190-2获得。
Common walnut (Juglans regia L.) has a long cultivation history, given its highly valuable wood and rich nutritious nuts. The Iranian Plateau has been considered as one of the last glaciation refugia and a centre of origin and domestication for the common walnut. However, a prerequisite to conserve or utilize the genetic resources of J. regia in the plateau is a comprehensive evaluation of the genetic diversity that is conspicuously lacking. In this regard, we used 31 polymorphic simple sequence repeat (SSR) markers to delineate the genetic variation and population structure of 508 J. regia individuals among 27 populations from the Iranian Plateau. The SSR markers expressed a high level of genetic diversity (HO = 0.438, and HE = 0.437). Genetic differentiation among the populations was moderate (FST = 0.124), and genetic variation within the populations (79%) significantly surpassed among populations (21%). The gene flow (Nm = 1.840) may have remarkably influenced the population genetic structure of J. regia, which can be attributed to anthropological activities and wind dispersal of pollen. The STRUCTURE analysis divided the 27 populations into two main clusters. Comparing the neighbor-joining and principal coordinate analysis dendrograms and the Bayesian STRUCTURE analysis revealed the general agreement between the population subdivisions and the genetic relationships among the populations. However, a few geographically close populations dispersed into different clusters. Further, the low genetic diversity of the Sulaymaniyah (SMR) population of Iraq necessitates urgent conservation by propagation and seedling management or tissue culture methods; additionally, we recommend the indispensable preservation of the Gonabad (RGR) and Arak (AKR) populations in Iran. These results reflected consistent high geographical affinity of the accession across the plateau. Our findings suggest that gene flow is a driving factor influencing the genetic structure of J. regia populations, whereas ecological and geological variables did not act as strong barriers. Moreover, the data reported herein provide new insights into the population structure of J. regia germplasm, which will help conserve genetic resources for the future, hence improving walnut breeding programs’ efficiency. The online version contains supplementary material available at 10.1186/s12870-023-04190-2.
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影响因子：
2.7
作者：
Ebrahimi A;Zarei A;Zamani Fardadonbeh M;Lawson S
通讯作者：
Lawson S
DOI：
10.1073/pnas.1016868108
发表时间：
2011-01-11
影响因子：
11.1
作者：
Henry, Amanda G.;Brooks, Alison S.;Piperno, Dolores R.
通讯作者：
Piperno, Dolores R.
影响因子：
12.3
作者：
通讯作者：
--
影响因子：
2.4
作者：
Ebrahimi, Aziz;Vahdati, Kourosh;Fallahi, Esmaeil
通讯作者：
Fallahi, Esmaeil
影响因子：
4.6
作者：
Arab, Mohammad Mehdi;Marrano, Annarita;Vahdati, Kourosh
通讯作者：
Vahdati, Kourosh