Genetic decline and inbreeding depression in an extremely rare tree

Li, Yuanyuan; Guan, Shenmin; Yang, Sen; Luo, Yuan; Chen, Xiao‐Yong

doi:10.1007/s10592-011-0286-x

Cited by 30 publications

(24 citation statements)

References 29 publications

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“…Lastly, population size is thought to be one of the factors affecting the level of genetic diversity in populations (Hensen and Oberprieler 2005). As we know, population size can influence the dynamics of plant populations (Li et al 2012). Genetic drift and inbreeding depression often threaten small populations (Chen et al 2003), resulting in low level of genetic variation.…”

Section: Genetic Diversity Of Castanopsis Sclerophylla Populationsmentioning

confidence: 99%

Leading‐edge populations do not show low genetic diversity or high differentiation in a wind‐pollinated tree

Shi

Chen

2012

Population Ecology

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Climate changes can shift species' ranges. Knowledge on genetic variation of the leading-edge populations provides critical information to understand responses and adaptation of plants to projected climate warming. To date, the research into genetic variation of leading-edge populations has been limited, particularly in the role of wind-mediated pollen flow in maintaining high genetic variation. Castanopsis sclerophylla (Fagaceae) is a wind-pollinated and gravity-dispersed tree. In the present study, we used seven polymorphic microsatellites to genotype 482 samples from five leading-edge and 12 nonedge populations. Significant effects of recent population bottleneck events were found in three of the five leadingedge populations, indicating that the leading-edge populations might have been recolonized after the Last Glacial Maximum. Genetic diversity was higher, though not significantly, in leading-edge than in non-edge populations. Relationship between genetic diversity and latitude indicated an increasing trend of genetic diversity towards leading-edge populations. No significant difference in genetic differentiation was found between leading-edge and non-edge populations. The inconsistence with the general predictions by leading-edge colonization model could be explained by high gene flow via pollen grains. Pollen-mediated gene flow could maintain high genetic diversity within and low differentiation among leadingedge populations. In response to climate warming, high genetic variation may provide leading-edge populations raw materials for evolutionary adaptation to future environmental conditions.

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Section: Genetic Diversity Of Castanopsis Sclerophylla Populationsmentioning

confidence: 99%

Leading‐edge populations do not show low genetic diversity or high differentiation in a wind‐pollinated tree

Shi

Chen

2012

Population Ecology

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“…Due to the impact of genetic drift and inbreeding, species with narrow geographic distributions and smaller-sized individuals generally show lower genetic diversity than more widespread ones (Li, Guan, Yang, Luo, & Chen, 2012;Willi, Van Buskirk, & Hoffmann, 2006). Therefore, endangered and rare species are regarded as being deficient in genetic variation (Hamrick & Godt, 1989).…”

Section: Genetic Diversity Of Wild Populations Of P Polyphylla Varmentioning

confidence: 99%

A comparative study of the population genetics of wild and cultivated populations of Paris polyphylla var. yunnanensis based on amplified fragment length polymorphism markers

Huang

Zhang

Yang

et al. 2019

Ecology and Evolution

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Paris polyphylla var. yunnanensis is one of the original plants used to make the traditional medicine Paridis Rhizoma. Wild individuals have been excessively collected in recent decades, and thus, it has become increasingly endangered. Cultivation is a major method for the conservation and sustainable utilization of its wild resources. In this study, amplified fragment length polymorphism markers were used in the genetic analysis of 15 wild and 17 cultivated populations of P. polyphylla var. yunnanensis. This study revealed that cultivated populations possessed higher genetic diversity than wild ones at the species level (H = 0.2636 vs. 0.2616, respectively). However, most of the genetic variation was found within populations for both of these groups (ΦST = 18.83% vs. 19.39%). In the dendrogram produced using UPGMA, the 32 populations were divided into three groups (I, II, and III). In group II, both wild and cultivated populations were included, but remained in distinct clusters within this group, which showed the significant separation between the cultivated and wild populations. Furthermore, wild populations were also clustered into three subgroups (W‐I, W‐II, and W‐III), with an obvious geographic structure. In contrast, although cultivated populations were similarly placed in three subgroups (C‐I, C‐II, and C‐III), the latter two of these were not separated based on geography. Finally, the wild populations in Guizhou, China (W‐I), possessed higher genetic diversity than those in Yunnan (W‐II and W‐III). As P. polyphylla var. yunnanensis is an endangered medicinal plant, the fact that it showed richer genetic diversity in its wild populations in Guizhou means that these should be regarded as priority areas for protection and used for provenance selection. Moreover, cultivated populations also showed high genetic variation, which might be attributed to them having originated from mixed provenances, indicating that screening for superior provenances should be carried out as soon as possible.

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“…Уменьшение размера популяции при-водит к потере генетического полиморфизма, а также к генетическому дрейфу и инбридингу (Lande, 1993;Kaljund, Jaaska, 2010). Результаты многочисленных исследований аллозимной изменчивости (Hamrick, Godt, 1990, 1996 и более поздних работ на основе таких маркеров ДНК, как RAPD, AFLP, ISSR и SSR, показали, что генетическое разнообразие ви дов, представленных маленькими изо-лированными по пуляциями, как правило, ниже, чем у широко распространенных видов (Willi et al, 2006;Li et al, 2012). В долгосрочной перспективе снижение ге-нетической ва риабельности в малых популяциях может привести к потере способности адаптироваться к изме-нениям окружающей среды.…”

Section: филогенетикаunclassified

Variability and interpopulation differentiation of the rare species Gueldenstaedtia monophylla Fisch. (Fabaceae)

Selyutina¹,

Konichenko²,

Дорогина³

2017

Vestn. VOGiS

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central Siberian Botanical garden SB raS, novosibirsk, russia genetic variability of the rare species Guelden staedtia monophylla from 7 natural populations in the central part of its range (ongudai district, altai republic) was studied. to characterize the genetic diversity of this rare relict species at the population level, SDS-electrophoresis of seed storage proteins was used. Polypeptide spectra of seeds contained from 17 to 32 protein components, of which 28 were polymorphic. the populations of G. mono phylla were revealed to have a sufficiently high level of genetic polymorphism, the genetic similarity index within the populations studied ranged from 0.673 to 0.813. the highest variability of seed storage proteins was found in the populations inegen (0.673) and Malaya inya (0.734). the lowest level of variability of the polypeptide spectra was in the population Bol'shoy Yaloman (0.813). the nei genetic distance between the populations studied was 0.018-0.215, the greatest distance in the protein spectra was found between inegen and Malaya inya (0.215). inegen was the most remote from the other populations, the nei distance between this population and all other populations varying from 0.113 to 0.215. With aMoVa, it was found that the share of intra-population variability is 53 % and inter-population, 47 %. Perhaps this high genetic diversity in populations of G. monophylla is provided and maintained by such biological characteristics of the species as cross-pollination, high life expectancy and a long reproductive period. the results of our study suggest that some rare species are able to maintain high levels of genetic diversity, even in a small-size population. the relatively high level of genetic variability indicates that the current genetic drift and inbreeding do not pose a threat to the survival of the species.Key words: genetic diversity; rare species; Gueldenstaedtia monophylla; SDS-electrophoresis; seed storage proteins polymorphism. в работе изучена генетическая изменчивость редкого вида гюльден-штедтии однолистной (Gueldenstaedtia monophylla) из семи природных популяций в центральной части ее ареала (Онгудайский район респуб-лики алтай). для характеристики генетического разнообразия этого реликтового вида как на видовом, так и на популяционном уровне был использован SDS-электрофорез запасных белков семян. Полипеп-тидные спектры семян содержали от 17 до 32 белковых компонентов, из которых 28 были полиморфными. в популяциях G. monophylla вы-явлен достаточно высокий уровень генетического полиморфизма, ве-личина индекса генетического сходства внутри изученных популя ций варьировала от 0.673 до 0.813. наибольшая изменчивость запасных белков семян установлена в популяциях инегень (0.673) и Малая иня (0.734). самый низкий уровень изменчивости полипептидных спект-ров выявлен в популяции Большой Яломан (0.813). генетическая дис-танция nei между изученными популяциями составила 0.018-0.215, наибольшая дистанция по белковым спектрам (0.215) найдена между популяциями инегень и Малая иня. Популяция инегень...

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Genetic decline and inbreeding depression in an extremely rare tree

Cited by 30 publications

References 29 publications

Leading‐edge populations do not show low genetic diversity or high differentiation in a wind‐pollinated tree

Leading‐edge populations do not show low genetic diversity or high differentiation in a wind‐pollinated tree

A comparative study of the population genetics of wild and cultivated populations of Paris polyphylla var. yunnanensis based on amplified fragment length polymorphism markers

Variability and interpopulation differentiation of the rare species Gueldenstaedtia monophylla Fisch. (Fabaceae)

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