Major quantitative trait loci control divergence in critical photoperiod for flowering between selfing and outcrossing species of monkeyflower (<i><scp>M</scp>imulus</i>)

Fishman, Lila; Sweigart, Andrea L.; Kenney, Amanda M.; Campbell, Samantha J

doi:10.1111/nph.12618

Cited by 35 publications

(57 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This parallels the finding of major QTLs underlying flowering-time divergence between M. nasutus and M. guttatus (Fishman et al, 2014a) and among ecotypes of M. guttatus (Friedman & Willis, 2013). For example, only two critical photoperiod QTLs are necessary and sufficient to completely explain M. nasutus-M. guttatus divergence corresponding to 3-4 wk differences in flowering phenology in sympatry (Fishman et al, 2014a).…”

Section: The Genetic Architecture Of Flowering-time Divergencesupporting

confidence: 51%

“…Flowering time was included because it is often associated with shifts in mating system (selfers flowering earlier). In addition, dramatic shifts in flowering phenology between M. guttatus and the selfer M. nasutus (Fishman et al, 2014a) and within M. guttatus (Friedman & Willis, 2013) appear to have a simple genetic basis compared with floral traits, which allows for second, parallel, comparison of genetic architectures. In measuring floral traits, we also discovered that a fraction of M. parishii 9 M. lewisii F 2 hybrids were completely male sterile, making deformed anthers with little or no pollen.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The genetic architecture of traits associated with the evolution of self‐pollination in Mimulus

et al. 2014

Self Cite

View full text Add to dashboard Cite

SummaryQuantitative trait locus (QTL) mapping is a first step toward understanding the genetic basis of adaptive evolution and may also reveal reproductive incompatibilities unique to hybrids. In plants, the shift from outcrossing to self-pollination is common, providing the opportunity for comparisons of QTL architecture among parallel evolutionary transitions.We used QTL mapping in hybrids between the bee-pollinated monkeyflower Mimulus lewisii and the closely related selfer Mimulus parishii to determine the genetic basis of divergence in floral traits and flowering time associated with mating-system evolution, and to characterize hybrid anther sterility.We found a moderately polygenic and highly directional basis for floral size evolution, suggesting adaptation from standing variation or in pursuit of a moving optimum, whereas only a few major loci accounted for substantial flowering-time divergence. Cytonuclear incompatibilities caused hybrid anther sterility, confounding estimation of reproductive organ QTLs.The genetic architecture of floral traits associated with selfing in M. parishii was primarily polygenic, as in other QTL studies of this transition, but in contrast to the previously characterized oligogenic basis of a pollinator shift in close relatives. Hybrid anther sterility appeared parallel at the molecular level to previously characterized incompatibilities, but also raised new questions about cytonuclear co-evolution in plants.

show abstract

Section: The Genetic Architecture Of Flowering-time Divergencesupporting

confidence: 51%

Section: Introductionmentioning

confidence: 99%

The genetic architecture of traits associated with the evolution of self‐pollination in Mimulus

et al. 2014

Self Cite

View full text Add to dashboard Cite

show abstract

“…Interestingly, three homologues of SHORT VEGETATIVE PHASE (SVP), a repressor of FT in Arabidopsis, are present in one of these regions. An attractive hypothesis is that M. nasutus could carry nonfunctional alleles of these SVP homologues, explaining its early flowering behavior (Fishman et al 2014), but further investigations are required to determine whether this region does encode malfunctioning SVP proteins.…”

Section: The Transition To Floweringmentioning

confidence: 99%

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

Glover¹,

Airoldi²,

Fernández‐Mazuecos³

et al. 2015

International Journal of Plant Sciences

View full text Add to dashboard Cite

Editor: Patrick S. HerendeenEvolutionary developmental biology has come to prominence in the past two decades, in both the plant kingdom and the animal kingdom, particularly following the description of homeotic genes linked to key morphological transitions. A primary goal of evolutionary developmental biology ("evo-devo") is to define how developmental programs are modified to generate novel or labile morphologies. This requires an understanding of the molecular genetic basis of these programs and of the evolutionary changes they have undergone. The past decade has seen the establishment of a common language and common standards, and these changes have greatly improved the integration of evo-devo. Recently, a more comparative approach has been added to mechanistic developmental biology. In this review we attempt to show how, by using this "next-generation evo-devo" approach, insights into both developmental biology and evolutionary biology can be gained. Although the concepts we discuss are more broadly applicable, we have focused our examples on traits of the angiosperm flower, a structure that has undergone enormous morphological and developmental evolution since its relatively recent appearance in the fossil record.

show abstract

“…Natural populations of both species are abundant throughout much of western North America but the range of M. nasutus is more restricted. In areas of overlap, the two Mimulus species are partially reproductively isolated by differences in floral morphology, flowering phenology, and pollen-pistil interactions (Diaz and MacNair 1999;Martin and Willis 2007;Fishman et al 2014 …”

mentioning

confidence: 99%

Evidence of Natural Selection Acting on a Polymorphic Hybrid Incompatibility Locus in Mimulus

Sweigart

Flagel

2014

Genetics

View full text Add to dashboard Cite

As a common cause of reproductive isolation in diverse taxa, hybrid incompatibilities are fundamentally important to speciation. A key question is which evolutionary forces drive the initial substitutions within species that lead to hybrid dysfunction. Previously, we discovered a simple genetic incompatibility that causes nearly complete male sterility and partial female sterility in hybrids between the two closely related yellow monkeyflower species Mimulus guttatus and M. nasutus. In this report, we fine map the two major incompatibility loci-hybrid male sterility 1 (hms1) and hybrid male sterility 2 (hms2)-to small nuclear genomic regions (each ,70 kb) that include strong candidate genes. With this improved genetic resolution, we also investigate the evolutionary dynamics of hms1 in a natural population of M. guttatus known to be polymorphic at this locus. Using classical genetic crosses and population genomics, we show that a 320-kb region containing the hms1 incompatibility allele has risen to intermediate frequency in this population by strong natural selection. This finding provides direct evidence that natural selection within plant species can lead to hybrid dysfunction between species.KEYWORDS speciation; hybrid incompatibilities; postzygotic reproductive isolation; Mimulus; monkeyflower S PECIATION occurs when diverging populations accumulate genetic differences that cause reproductive isolation. Many forms of prezygotic reproductive isolation likely evolve as byproducts of adaptation to different ecological conditions (e.g., habitat or behavioral differences), but the evolutionary dynamics of intrinsic postzygotic isolation are less clear. This is because the production of dead or sterile hybrids cannot be favored by natural selection. Dobzhansky (1937) and Muller (1942) proposed a solution to this long-standing mystery (Darwin 1859), explaining that a new mutation might function perfectly well with alleles present in its native species, and only cause sterility or inviability when found in a hybrid genetic background. The so-called Dobzhansky-Muller model shows that natural selection need not oppose the evolution of hybrid dysfunction, but it makes no predictions about the nature of the genetic changes or the evolutionary forces that give rise to hybrid incompatibilities.The recent identification of several hybrid incompatibility genes in diverse taxa has begun to reveal some insights into the evolution of hybrid dysfunction (reviewed in Presgraves 2010; Maheshwari and Barbash 2011;Sweigart and Willis 2012). In Arabidopsis and rice, genetic incompatibilities have been mapped to duplicate genes that carry loss-of-function alleles in alternate copies (Bikard et al. 2009;Mizuta et al. 2010;Yamagata et al. 2010), suggesting that divergence among paralogs via mutation and genetic drift might cause postzygotic reproductive isolation (Lynch and Force 2000). There are also hints that natural selection can contribute to the spread of incompatible alleles within populations and species. For example, ...

show abstract

Major quantitative trait loci control divergence in critical photoperiod for flowering between selfing and outcrossing species of monkeyflower (Mimulus)

Cited by 35 publications

References 61 publications

The genetic architecture of traits associated with the evolution of self‐pollination in Mimulus

The genetic architecture of traits associated with the evolution of self‐pollination in Mimulus

How Have Advances in Comparative Floral Development Influenced Our Understanding of Floral Evolution?

Evidence of Natural Selection Acting on a Polymorphic Hybrid Incompatibility Locus in Mimulus

Contact Info

Product

Resources

About