Hypothesizing hybrids and parents using character intermediacy, parental distance, and equality

Estabrook, George F.; Gil-ad, Nir L.; Reznicek, Anton A.

doi:10.2307/1224249

Cited by 11 publications

(5 citation statements)

References 18 publications

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“…Although F 1 hybrids can often be identified by character intermediacy (Estabrook et al 1996, though see Kleinschmit et al 1995), hybrids in the second generation and later may fall anywhere along a phenotypic continuum between the two parents and often resemble one parent only (Stebbins 1950;Rieseberg and Ellstrand 1993). Our findings suggest that many putative hybrids are late-generation backcrosses toward Quercus ellipsoidalis, and that Q. ellipsoidalis readily introgresses into Q. velutina.…”

Section: Discussionmentioning

confidence: 61%

Taxonomy of Hill's Oak (Quercus ellipsoidalis: Fagaceae): Evidence from AFLP Data

Hipp

Weber

2008

Systematic Botany

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Quercus ellipsoidalis (Hill's oak), an endemic of east-central North America, is morphologically similar to Q. coccinea (scarlet oak) and is subsumed into that species in several floristic treatments. This study uses data from more than 250 amplified fragment length polymorphism (AFLP) markers to investigate whether Q. coccinea and Q. ellipsoidalis are genetically distinct from one another. Whereas Q. coccinea and Q. ellipsoidalis separate from one another in all analyses, Q. velutina (black oak) populations collected from the geographic range of both Q. coccinea and Q. ellipsoidalis do not separate out by geographic region. This, combined with the strong differentiation between Q. coccinea and Q. velutina but weak differentiation between Q. ellipsoidalis and Q. velutina, supports the view that Q. coccinea and Q. ellipsoidalis are not simply regional variants of a single taxon. Moreover, while there is no evidence from the molecular data we collected of hybridization between Q. coccinea and Q. ellipsoidalis, the data suggest that there may be gene flow between Q. ellipsoidalis and Q. velutina. A clearer understanding of the relationships among these taxa is essential to understanding the taxonomy of Quercus section Lobate in eastern North America.

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Section: Discussionmentioning

confidence: 61%

Taxonomy of Hill's Oak (Quercus ellipsoidalis: Fagaceae): Evidence from AFLP Data

Hipp

Weber

2008

Systematic Botany

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“…Hybridization clearly plays a role in cane biology, but it remains unclear how important this phenomenon has been in the evolution of Arundinaria . Several types of hybrids can be hypothesized, including newly formed (F1) hybrids, later generation hybrids, introgressants, and hybrid species (Estabrook et al, 1996; Vriesendorp and Bakker, 2005). Based on current evidence, hybrid speciation does not seem to have occurred in Arundinaria .…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic relationships and natural hybridization among the North American woody bamboos (Poaceae: Bambusoideae:Arundinaria)

Triplett

Oltrogge

Clark

2010

American J of Botany

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In spite of the ecological and economic importance of temperate bamboos, relatively little is known about their population biology or evolutionary history. Recently, hybridization has emerged as a potential source of diversity in this group, as well as an underlying cause of taxonomic problems. As part of a broader phylogenetic study of the temperate bamboos, we report the results of an analysis of the North American Arundinaria gigantea species complex, including estimates of genetic variation and molecular evidence of natural hybridization among A. gigantea, A. tecta, and A. appalachiana. The study involved a comparative analysis of amplified fragment length polymorphisms (AFLPs) and chloroplast DNA sequences representing diversity within and among all three species plus individuals with intermediate or unusual morphological characteristics (putative hybrids). Molecular results support the recognition of three species previously defined on the basis of morphology, anatomy, and ecology, with most of the molecular variance accounted for by among-species variation. Molecular evidence also demonstrates that A. tecta and A. appalachiana are sister species, forming a clade that is significantly divergent from A. gigantea. The role of hybridization in the phylogenetic history of Arundinaria is discussed along with implications for the evolution and taxonomy of the temperate woody bamboos.

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“…For analysis of the putative hybrid specimens a data matrix containing 14 quantitative characters from 57 individuals of P. spinosa, P. dornestica ssp. insititia, and putative hybrids was subjected to HYWIN (version 2.04e; Estabrook et al 1996). HYWIN is a computerised procedure for screening morphological variation objectively in taxa suspected to be hybrids.…”

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confidence: 99%

A morphometric analysis of Prunus spinosa, P. domestica ssp. insititia, and their putative hybrids in Denmark

Nielsen¹,

Olrik

2001

Nordic Journal of Botany

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2001. A morphometric analysis of Prunus spinosa, R domestica ssp. insititia, and their putative hybrids in Denmark. -Nord. J. Bot. 21: 349-363. Copenhagen. ISSN 0107-055X.The taxonomy of Prunus subgenus Prunus is notoriously problematic and reliable discriminating characters for species and subspecies identification are missing. Principal Component Analysis (PCA) was performed on different morphological data sets and useful diagnostic characters for Prunus spinosa and I! domestica ssp. insititia were found. Many traditionally used morphological characters were found unreliable. The hypothesis of widespread hybridization between Prunus spinosa and R domestica ssp. insititia in Denmark were examined using PCA and HYWIN. It was found that hybrids between the two taxa are rare in Denmark.

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Hypothesizing hybrids and parents using character intermediacy, parental distance, and equality

Cited by 11 publications

References 18 publications

Taxonomy of Hill's Oak (Quercus ellipsoidalis: Fagaceae): Evidence from AFLP Data

Taxonomy of Hill's Oak (Quercus ellipsoidalis: Fagaceae): Evidence from AFLP Data

Phylogenetic relationships and natural hybridization among the North American woody bamboos (Poaceae: Bambusoideae:Arundinaria)

A morphometric analysis of Prunus spinosa, P. domestica ssp. insititia, and their putative hybrids in Denmark

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