Unusual patterns of hybridization involving a narrow endemic<i>Rhododendron</i>species (Ericaceae) in Yunnan, China

Ma, Yongpeng; Milne, Richard I.; Zhang, Changqin; Yang, Jun‐Bo

doi:10.3732/ajb.1000018

Cited by 43 publications

(48 citation statements)

References 51 publications

(67 reference statements)

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“…To infer population structure and assign individuals to populations, the program STRUCTURE version 2.3.1 was used [44], following the methods described by Ma et al . [45]. We adopted the admixture model with correlated allele frequencies.…”

Section: Methodsmentioning

confidence: 99%

High Genetic Diversity and Low Differentiation of Michelia coriacea (Magnoliaceae), a Critically Endangered Endemic in Southeast Yunnan, China

Zhao

Sun

et al. 2012

IJMS

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Michelia coriacea, a critically endangered tree, has a restricted and fragmented distribution in Southeast Yunnan Province, China. The genetic diversity, genetic structure and gene flow in the three extant populations of this species were detected by 10 inter-simple sequence repeat (ISSR) markers and 11 simple sequence repeat (SSR) markers. Examination of genetic diversity revealed that the species maintained a relatively high level of genetic diversity at the species level (percentage of polymorphic bands) PPB = 96.36% from ISSRs; PPL (percentage of polymorphic loci) = 95.56% from SSRs, despite several fragmental populations. Low levels of genetic differentiation among the populations of M. coriacea were detected by Nei’s Gst = 0.187 for ISSR and Wright’s Fst = 0.090 for SSR markers, which is further confirmed by Bayesian model-based STRUCTURE and PCoA analysis that could not reveal a clear separation between populations, although YKP was differentiated to other two populations by ISSR markers. Meanwhile, AMOVA analysis also indicated that 22.84% and 13.90% of genetic variation existed among populations for ISSRs and SSRs, respectively. The high level of genetic diversity, low genetic differentiation, and the population, structure imply that the fragmented habitat and the isolated population of M. coriacea may be due to recent over-exploitation. Conservation and management of M. coriacea should concentrate on maintaining the high level of genetic variability through both in and ex-situ conservation actions.

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Section: Methodsmentioning

confidence: 99%

High Genetic Diversity and Low Differentiation of Michelia coriacea (Magnoliaceae), a Critically Endangered Endemic in Southeast Yunnan, China

Zhao

Sun

et al. 2012

IJMS

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“…Hence, increasing levels of habitat disturbance are likely to promote hybridization (Levin et al, ; Rieseberg & Carney, ). For P. bulleyana and P. beesiana , the single hybrid zone detected might either be a stable, long‐term phenomenon or a relatively recent occurrence, initiated or at least facilitated by habitat disturbance (Ma et al, ). To date, we have not observed any evidence indicating that it is a stable, long‐term phenomenon.…”

Section: Discussionmentioning

confidence: 99%

Evidence for natural hybridization betweenPrimula beesianaandP. bulleyana, two heterostylous primroses in NW Yunnan, China

Tian

Zhang

et al. 2014

J of Sytematics Evolution

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Natural hybridization was assumed to play an essential role for the diversification of Primula; however, only one study of hybridization in the region of the Himalayas has been undertaken. In the present study, we examined another natural hybrid zone where morphologically putative hybrids as well as P. beesiana Forrest, P. bulleyana Forrest, and P. poissonii Franch. co‐occurred. We used molecular data to confirm the parental species of putative hybrids and the unidirectional hybridization pattern between P. beesiana and P. bulleyana. Moreover, with reference to synthetic F1s, most hybrids examined are possibly advanced generations, although the possibility of F1 hybrids currently examined could not be completely excluded. In addition, pollinator observations on experimental arrays of transplanted parental species showed interspecific pollen flows during visitations of shared pollinators, indicating an incomplete pre‐zygotic barrier between P. beesiana and P. bulleyana. Seed productions from both flower morphs of putative hybrids were significantly lower than parental species, suggesting lower reproductive success in these hybrids. Combined with the evidence of recent habitat disturbance in the study area, we might witness the early process of hybridization between P. beesiana and P. bulleyana.

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“…In this article, we present the results of an amplified fragment length polymorphism (AFLP) DNA fingerprinting study to resolve the status of the Awahokomo Convolvulus. AFLP is a technique capable of generating many polymorphic genetic markers and is widely used in studies of genetic variation within species (Jorgensen & Mauricio 2004), hybridization between species (Ma et al 2010) and species delimitation (French et al 2008;Zeng et al 2010). …”

Section: Please Scroll Down For Articlementioning

confidence: 99%

Interspecific hybridization among indigenous New ZealandConvolvulus(Convolvulaceae) and the affinities of the Awahokomo limestone population

Smissen

Heenan

2011

New Zealand Journal of Botany

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The Awahokomo karstland in North Otago has a distinctive limestone flora, including an unusual population of Convolvulus. These plants are morphologically intermediate between the indigenous Convolvulus verecundus and Convolvulus waitaha, which are also present in the area. Amplified fragment length polymorphism (AFLP) profiles of plants from this population were compared with those of the other indigenous Convolvulus species to test whether they have a hybrid origin. Convolvulus verecundus and C. waitaha are well differentiated by their AFLP profiles but hybrids between them appear to be common when the species are sympatric. The fertility of these hybrids is evidenced by the presence of a backcross individual near Awahokomo. However, the AFLP profiles provide no evidence of a hybrid or introgressant origin of the unusual Awahokomo population and are consistent with it being conspecific with C. verecundus. Moreover, AFLP profiles did not distinguish C. verecundus from a third New Zealand species, Convolvulus fractosaxosa, suggesting that they might be conspecific.

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Unusual patterns of hybridization involving a narrow endemicRhododendronspecies (Ericaceae) in Yunnan, China

Cited by 43 publications

References 51 publications

High Genetic Diversity and Low Differentiation of Michelia coriacea (Magnoliaceae), a Critically Endangered Endemic in Southeast Yunnan, China

High Genetic Diversity and Low Differentiation of Michelia coriacea (Magnoliaceae), a Critically Endangered Endemic in Southeast Yunnan, China

Evidence for natural hybridization betweenPrimula beesianaandP. bulleyana, two heterostylous primroses in NW Yunnan, China

Interspecific hybridization among indigenous New ZealandConvolvulus(Convolvulaceae) and the affinities of the Awahokomo limestone population

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