Systematics and the origin of species: An introduction

Hey, Jody; Fitch, Walter M.; Ayala, Francisco J.

doi:10.1073/pnas.0501939102

Cited by 11 publications

(11 citation statements)

References 41 publications

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“…Under Mayr's () biological species concept, the origin of species involves reproductive isolation and evidence still favors the view that new species usually arise as byproducts of evolution in geographically isolated populations (Coyne & Orr, ; Hey, Fitch, & Ayala, ; Pfennig & Pfennig, ; Schluter, ). Global environmental change caused by human activity has eliminated many geographic barriers that prevented secondary contact between closely related taxa that arose through allopatric speciation.…”

Section: Introductionmentioning

confidence: 99%

Size‐assortative choice and mate availability influences hybridization between red wolves (Canis rufus) and coyotes (Canis latrans)

Hinton

Gittleman

Manen

et al. 2018

Ecology and Evolution

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Anthropogenic hybridization of historically isolated taxa has become a primary conservation challenge for many imperiled species. Indeed, hybridization between red wolves (Canis rufus) and coyotes (Canis latrans) poses a significant challenge to red wolf recovery. We considered seven hypotheses to assess factors influencing hybridization between red wolves and coyotes via pair‐bonding between the two species. Because long‐term monogamy and defense of all‐purpose territories are core characteristics of both species, mate choice has long‐term consequences. Therefore, red wolves may choose similar‐sized mates to acquire partners that behave similarly to themselves in the use of space and diet. We observed multiple factors influencing breeding pair formation by red wolves and found that most wolves paired with similar‐sized conspecifics and wolves that formed congeneric pairs with nonwolves (coyotes and hybrids) were mostly female wolves, the smaller of the two sexes. Additionally, we observed that lower red wolf abundance relative to nonwolves and the absence of helpers increased the probability that wolves consorted with nonwolves. However, successful pairings between red wolves and nonwolves were associated with wolves that maintained small home ranges. Behaviors associated with territoriality are energetically demanding and behaviors (e.g., aggressive interactions, foraging, and space use) involved in maintaining territories are influenced by body size. Consequently, we propose the hypothesis that size disparities between consorting red wolves and coyotes influence positive assortative mating and may represent a reproductive barrier between the two species. We offer that it may be possible to maintain wild populations of red wolves in the presence of coyotes if management strategies increase red wolf abundance on the landscape by mitigating key threats, such as human‐caused mortality and hybridization with coyotes. Increasing red wolf abundance would likely restore selection pressures that increase mean body and home‐range sizes of red wolves and decrease hybridization rates via reduced occurrence of congeneric pairs.

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Section: Introductionmentioning

confidence: 99%

Size‐assortative choice and mate availability influences hybridization between red wolves (Canis rufus) and coyotes (Canis latrans)

Hinton

Gittleman

Manen

et al. 2018

Ecology and Evolution

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“…This may relate to evolutionary changes in transcriptional activity of fertility factors, thereby altering networks and pathways associated with male reproduction. Such changes could enhance the development of reproductive barriers during a time period of possible back hybridization in populations of diverging species and, in conjunction with geographic separation, could promote speciation (for review, see Hey et al 2005).…”

Section: Discussionmentioning

confidence: 99%

Evolutionary dynamics of segmental duplications from human Y-chromosomal euchromatin/heterochromatin transition regions

Kirsch¹,

Münch²,

Jiang³

et al. 2008

Genome Res.

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Human chromosomal regions enriched in segmental duplications are subject to extensive genomic reorganization. Such regions are particularly informative for illuminating the evolutionary history of a given chromosome. We have analyzed 866 kb of Y-chromosomal non-palindromic segmental duplications delineating four euchromatin/heterochromatin transition regions (Yp11.2/Yp11.1, Yq11.1/Yq11.21, Yq11.23/Yq12, and Yq12/PAR2). Several computational methods were applied to decipher the segmental duplication architecture and identify the ancestral origin of the 41 different duplicons. Combining computational and comparative FISH analysis, we reconstruct the evolutionary history of these regions. Our analysis indicates a continuous process of transposition of duplicated sequences onto the evolving higher primate Y chromosome, providing unique insights into the development of species-specific Y-chromosomal and autosomal duplicons. Phylogenetic sequence comparisons show that duplicons of the human Yp11.2/Yp11.1 region were already present in the macaque-human ancestor as multiple paralogs located predominantly in subtelomeric regions. In contrast, duplicons from the Yq11.1/Yq11.21, Yq11.23/Yq12, and Yq12/PAR2 regions show no evidence of duplication in rhesus macaque, but map to the pericentromeric regions in chimpanzee and human. This suggests an evolutionary shift in the direction of duplicative transposition events from subtelomeric in Old World monkeys to pericentromeric in the human/ape lineage. Extensive chromosomal relocation of autosomal-duplicated sequences from euchromatin/heterochromatin transition regions to interstitial regions as demonstrated on the pygmy chimpanzee Y chromosome support a model in which substantial reorganization and amplification of duplicated sequences may contribute to speciation.

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“…Stebbins' , Variation and Evolution in Plants. In 2004, just a few months before Ernst Mayr passed away on February 3, 2005, and 62 years after publication of his classic book with the same title, ''Systematics and the Origin of Species'' (Hey et al, 2004).…”

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confidence: 99%