A Similar Genetic Architecture Underlies the Convergent Evolution of the Selfing Syndrome in <i>Capsella</i>

Woźniak, Natalia Joanna; Kappel, Christian; Marona, Cindy; Altschmied, Lothar; Neuffer, Barbara; Sicard, Adrien

doi:10.1105/tpc.19.00551

Cited by 21 publications

(56 citation statements)

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“…For comparison, we identified nine published QTL mapping studies of the selfing syndrome. They spanned a broad range of angiosperm model systems: three studies in Mimulus (Lin and Ritland, 1997;Fishman et al, 2002Fishman et al, , 2014, two from Solanum (Bernacchi and Tanksley, 1997;Georgiady et al, 2002), three in Capsella Slotte et al, 2012;Woźniak et al, 2020), and one from Leptosiphon (Goodwillie et al, 2006). We grouped traits from the previous publications into these same anatomical modules.…”

Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

“…In Solanum, the degree of overlap and number of regions in play are lower (0.234, 0.167; (Bernacchi and Tanksley, 1997;Georgiady et al, 2002). In Leptosiphon, overlap is quite high (0.301; (Goodwillie et al, 2006), and studies in Capsella find high concentration of floral morphological traits into few regions (0.286, 277, 0.369, 0.367; Slotte et al, 2012;Woźniak et al, 2020). Therefore the pattern we observed in Ipomoea lacunosa floral traits, of numerous loci of small effect with high overlap, is common but by no means universal, and the floral reductions of the selfing syndrome can evolve from a variety of underlying genetic architectures.…”

Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

“…Finally, we identified considerable variation in which pairs of modules showed the strongest overlap. In Capsella, vegetative traits frequently showed high overlap with floral morphological and reproductive traits Woźniak et al, 2020), which appears to be unusual in flowering plants (Ashman and Majetic, 2006;Feng et al, 2019). In Mimulus and Solanum, floral morphological traits and inflorescence traits overlapped more (Georgiady et al, 2002;Fishman et al, 2014).…”

Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

“…In Mimulus, most studies find high QTL overlap within floral traits (Lin and Ritland, 1997;Fishman et al, 2002Fishman et al, , 2014, and that floral traits are controlled by pleiotropic QTLs scattered across the genome. Overlap is high, but overall numbers of QTL lower, in Leptosiphon and Capsella (Goodwillie et al, 2006;Slotte et al, 2012;Woźniak et al, 2020), while Solanum had low overlap for floral traits and few regions (Bernacchi and Tanksley, 1997;Georgiady et al, 2002). Between-module overlap also varies widely across systems.…”

Section: Comparative Genetic Architecture Of the Selfing Syndromementioning

confidence: 99%

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GENETIC ARCHITECTURE OF DIVERGENCE: THE SELFING SYNDROME IN IPOMOEA LACUNOSA

Rifkin

Cao

Rausher

2021

Preprint

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Premise of the studyHighly selfing plant species frequently display a distinctive suite of traits termed the “selfing syndrome.” This study tests the hypothesis that these traits are grouped into correlated evolutionary modules and determines the degree of independence between such modules.MethodsWe evaluated phenotypic correlations and QTL overlaps in F2 offspring of a cross between the morning glories Ipomoea lacunosa and I. cordatotriloba and investigated how traits clustered into modules at both the phenotypic and genetic level. We then compared our findings to other QTL studies of the selfing syndrome.Key resultsIn the I. lacunosa selfing syndrome, traits group into modules that display correlated evolution within but not between modules. QTL overlap predicts phenotypic correlations, and QTLs affecting the same trait module are significantly physically clustered in the genome. The genetic architecture of the selfing syndrome varies across systems, but the pattern of stronger within-than between-module correlation is widespread.ConclusionsThe genetic architecture we observe in the selfing syndrome is consistent with a growing understanding of floral morphological integration achieved via pleiotropy in clustered traits. This view of floral evolution is consistent with resource limitation or predation driving the evolution of the selfing syndrome, but invites further research into both the selective causes of the selfing syndrome and how genetic architecture itself evolves in response to changes in mating system.

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Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

Section: Qtl Overlap In Other Selfing-syndrome Speciesmentioning

confidence: 99%

Section: Comparative Genetic Architecture Of the Selfing Syndromementioning

confidence: 99%

See 2 more Smart Citations

GENETIC ARCHITECTURE OF DIVERGENCE: THE SELFING SYNDROME IN IPOMOEA LACUNOSA

Rifkin

Cao

Rausher

2021

Preprint

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“…1 µg of DNA per sample was used for preparing the ddRAD library. Preparation of the library for ddRAD-seq was performed as described 27 , using EcoRI and MspI as restriction enzymes. The libraries were sequenced on a NextSeq 500 instrument with a mid-output kit in 2 × 75 paired-end mode.…”

Section: Methodsmentioning

confidence: 99%

Fairy circles in Namibia are assembled from genetically distinct grasses

Kappel¹,

Illing²,

Huu³

et al. 2020

Commun Biol

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Fairy circles are striking regularly sized and spaced, bare circles surrounded by Stipagrostis grasses that occur over thousands of square kilometres in Namibia. The mechanisms explaining their origin, shape, persistence and regularity remain controversial. One hypothesis for the formation of vegetation rings is based on the centrifugal expansion of a single individual grass plant, via clonal growth and die-back in the centre. Clonality could explain FC origin, shape and long-term persistence as well as their regularity, if one clone competes with adjacent clones. Here, we show that for virtually all tested fairy circles the periphery is not exclusively made up of genetically identical grasses, but these peripheral grasses belong to more than one unrelated genet. These results do not support a clonal explanation for fairy circles. Lack of clonality implies that a biological reason for their origin, shape and regularity must emerge from competition between near neighbor individuals within each fairy circle. Such lack of clonality also suggests a mismatch between longevity of fairy circles versus their constituent plants. Furthermore, our findings of lack of clonality have implications for some models of spatial patterning of fairy circles that are based on self-organization.

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Genetic architecture of divergence: the selfing syndrome in Ipomoea lacunosa

Rifkin

Cao

Rausher

2021

American J of Botany

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Highly selfing plant species frequently display a distinctive suite of traits termed the selfing syndrome. Here we tested the hypothesis that these traits are grouped into correlated evolutionary modules and determined the degree of independence between such modules. Methods: We evaluated phenotypic correlations and QTL overlaps in F2 offspring of a cross between the morning glories Ipomoea lacunosa and I. cordatotriloba and investigated how traits clustered into modules at both the phenotypic and genetic level. We then compared our findings to other QTL studies of the selfing syndrome. Results: In the I. lacunosa selfing syndrome, traits grouped into modules that displayed correlated evolution within but not between modules. QTL overlap predicted phenotypic correlations, and QTLs affecting the same trait module were significantly physically clustered in the genome. The genetic architecture of the selfing syndrome varied across systems, but the pattern of stronger within-than between-module correlation was widespread. Conclusions: The genetic architecture we observe in the selfing syndrome is consistent with a growing understanding of floral morphological integration achieved via pleiotropy in clustered traits. This view of floral evolution is consistent with resource limitation or predation driving the evolution of the selfing syndrome, but invites further research into both the selective causes of the selfing syndrome and how genetic architecture itself evolves in response to changes in mating system.

show abstract

A Similar Genetic Architecture Underlies the Convergent Evolution of the Selfing Syndrome in Capsella

Cited by 21 publications

References 82 publications

GENETIC ARCHITECTURE OF DIVERGENCE: THE SELFING SYNDROME IN IPOMOEA LACUNOSA

GENETIC ARCHITECTURE OF DIVERGENCE: THE SELFING SYNDROME IN IPOMOEA LACUNOSA

Fairy circles in Namibia are assembled from genetically distinct grasses

Genetic architecture of divergence: the selfing syndrome in Ipomoea lacunosa

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