Role of Gene Interactions in Hybrid Speciation: Evidence from Ancient and Experimental Hybrids

Rieseberg, Loren H.; Sinervo, Barry; Linder, C. Randal; Ungerer, Mark C.; Arias, Dulce M.

doi:10.1126/science.272.5262.741

Cited by 404 publications

(390 citation statements)

References 19 publications

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“…For the genus Helianthus, a similar observation that only some of the ancestor chromosomes are rearranged in the extant chromosomes has been discussed in detail. In this genus, such rearrangement was associated with chromosomal differences between two sister species contributing to a GWD allopolyploid event 35 .…”

Section: G T a A C C G G T T G T A C C T A G C T A G A C G T A A C mentioning

confidence: 98%

The genome of the domesticated apple (Malus × domestica Borkh.)

et al. 2010

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Section: G T a A C C G G T T G T A C C T A G C T A G A C G T A A C mentioning

confidence: 98%

The genome of the domesticated apple (Malus × domestica Borkh.)

et al. 2010

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“…An obvious end-point to this process would be speciation. Speciation results from fitness epistasis which leads to the buildup of co-adapted gene complexes (Rieseberg et al, 1996). In this regard, the co-adapted trait complexes that arise from the evolution of self-reinforcing genetic correlations, may create pre-conditions for speciation.…”

Section: Speciation?mentioning

confidence: 99%

Correlational selection and the evolution of genomic architecture

2002

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We review and discuss the importance of correlational selection (selection for optimal character combinations) in natural populations. If two or more traits subject to multivariate selection are heritable, correlational selection builds favourable genetic correlations through the formation of linkage disequilibrium at underlying loci governing the traits. However, linkage disequilibria built up by correlational selection are expected to decay rapidly (ie, within a few generations), unless correlational selection is strong and chronic. We argue that frequency-dependent biotic interactions that have 'Red Queen dynamics' (eg, host-parasite interactions, predator-prey relationships or intraspecific arms races) often fuel chronic correlational selection, which is strong enough to maintain adaptive genetic correlations of the kind we describe. We illustrate these processes and phenomena

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“…This phenomenon could alleviate the loss of genetic diversity due to bottlenecks arising from small initial founder populations during colonization events (Husband and Barrett, 1991;Lee, 2002) and contribute to the ecological success of colonizing populations. However, genomic incompatibilities may affect the fitness of early generations of hybrids (Rieseberg et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

On the origin of the invasive olives (Olea europaea L., Oleaceae)

et al. 2007

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The olive tree (Olea europaea) has successfully invaded several regions in Australia and Pacific islands. Two olive subspecies (subspp. europaea and cuspidata) were first introduced in these areas during the nineteenth century. In the present study, we determine the origin of invasive olives and investigate the importance of historical effects on the genetic diversity of populations. Four invasive populations from Australia and Hawaii were characterized using eight nuclear DNA microsatellites, plastid DNA markers as well as ITS-1 sequences. Based on these data, their genetic similarity with native populations was investigated, and it was determined that East Australian and Hawaiian populations (subsp. cuspidata) have originated from southern Africa while South Australian populations (subsp. europaea) have mostly derived from western or central Mediterranean cultivars. Invasive populations of subsp. cuspidata showed significant loss of genetic diversity in comparison to a putative source population, and a recent bottleneck was evidenced in Hawaii. Conversely, invasive populations of subsp. europaea did not display significant loss of genetic diversity in comparison to a native Mediterranean population. Different histories of invasion were inferred for these two taxa with multiple cultivars introduced restoring gene diversity for europaea and a single successful founder event and sequential introductions to East Australia and then Hawaii for cuspidata. Furthermore, one hybrid (cuspidata Â europaea) was identified in East Australia. The importance of hybridizations in the future evolution of the olive invasiveness remains to be investigated.

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Role of Gene Interactions in Hybrid Speciation: Evidence from Ancient and Experimental Hybrids

Cited by 404 publications

References 19 publications

The genome of the domesticated apple (Malus × domestica Borkh.)

The genome of the domesticated apple (Malus × domestica Borkh.)

Correlational selection and the evolution of genomic architecture

On the origin of the invasive olives (Olea europaea L., Oleaceae)

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