Evidence for DNA Loss as a Determinant of Genome Size

Petrov, Dmitri A.; Sangster, Todd A.; Johnston, J. Spencer; Hartl, Daniel L.; Shaw, Kerry L.

doi:10.1126/science.287.5455.1060

Cited by 337 publications

(228 citation statements)

References 20 publications

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“…1C), showing a normal distribution between the pulse rates of the 2 parental species (F 2 pulse rate mean Ϯ SD ϭ 1.86 Ϯ 0.36; Shapiro-Wilk: W ϭ 0.994, P ϭ 0.636) (23). (23), equal to the number predicted by cytological analysis (24). Most AFLP markers are dominant, but inclusion of several codominant AFLP markers allowed alignment of the Lp and Lk maps ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Genomic linkage of male song and female acoustic preference QTL underlying a rapid species radiation

Shaw

Lesnick

2009

Proc. Natl. Acad. Sci. U.S.A.

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107

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The genetic coupling hypothesis of signal-preference evolution, whereby the same genes control male signal and female preference for that signal, was first inspired by the evolution of cricket acoustic communication nearly 50 years ago. To examine this hypothesis, we compared the genomic location of quantitative trait loci (QTL) underlying male song and female acoustic preference variation in the Hawaiian cricket genus Laupala. We document a QTL underlying female acoustic preference variation between 2 closely related species (Laupala kohalensis and Laupala paranigra). This preference QTL colocalizes with a song QTL identified previously, providing compelling evidence for a genomic linkage of the genes underlying these traits. We show that both song and preference QTL make small to moderate contributions to the behavioral difference between species, suggesting that divergence in mating behavior among Laupala species is due to the fixation of many genes of minor effect. The diversity of acoustic signaling systems in crickets exemplifies the evolution of elaborate male displays by sexual selection through female choice. Our data reveal genetic conditions that would enable functional coordination between song and acoustic preference divergence during speciation, resulting in a behaviorally coupled mode of signalpreference evolution. Interestingly, Laupala exhibits one of the fastest rates of speciation in animals, concomitant with equally rapid evolution in sexual signaling behaviors. Genomic linkage may facilitate rapid speciation by contributing to genetic correlations between sexual signaling behaviors that eventually cause sexual isolation between diverging populations.Laupala ͉ sexual isolation ͉ signal ͉ speciation

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Section: Resultsmentioning

confidence: 99%

Genomic linkage of male song and female acoustic preference QTL underlying a rapid species radiation

Shaw

Lesnick

2009

Proc. Natl. Acad. Sci. U.S.A.

Self Cite

111

107

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“…For example, wheat breeders have been able to use mutants of the duplicated gibberellin insensitivity loci to design wheat with specific heights (Peng et al, 1999). Further studies contrasting the relative rates of insertion and deletion events should soon shed light on the reasons for the enormous variation in c-value among plant species, as recently argued for invertebrate genome evolution (Petrov et al 2000).…”

Section: Genome Structurementioning

confidence: 99%

Molecular Diversity, Structure and Domestication of Grasses

2001

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“…Similarly, 80% of NUPTs are eliminated from the rice nuclear genome within a million years (Matsuo et al, 2005). The rate of DNA loss differs between DNA fragment sizes and among species (Petrov et al, 2000) and can potentially contribute to the sizedependent filtering of NUPTs or NUMTs (Richly and Leister, 2004a,b). In this way, the nuclear genome absorbs, fragments, reshuffles and eliminates plastid and mitochondrial sequences with a species-specific mode and tempo.…”

Section: A Model Of Nupt/numt and Te Dynamicsmentioning

confidence: 99%

Analysis of plastid and mitochondrial DNA insertions in the nucleus (NUPTs and NUMTs) of six plant species: size, relative age and chromosomal localization

2013

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We analysed the size, relative age and chromosomal localization of nuclear sequences of plastid and mitochondrial origin (NUPTs-nuclear plastid DNA and NUMTs-nuclear mitochondrial DNA) in six completely sequenced plant species. We found that the largest insertions showed lower divergence from organelle DNA than shorter insertions in all species, indicating their recent origin. The largest NUPT and NUMT insertions were localized in the vicinity of the centromeres in the small genomes of Arabidopsis and rice. They were also present in other chromosomal regions in the large genomes of soybean and maize. Localization of NUPTs and NUMTs correlated positively with distribution of transposable elements (TEs) in Arabidopsis and sorghum, negatively in grapevine and soybean, and did not correlate in rice or maize. We propose a model where new plastid and mitochondrial DNA sequences are inserted close to centromeres and are later fragmented by TE insertions and reshuffled away from the centromere or removed by ectopic recombination. The mode and tempo of TE dynamism determines the turnover of NUPTs and NUMTs resulting in their species-specific chromosomal distributions.

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Evidence for DNA Loss as a Determinant of Genome Size

Cited by 337 publications

References 20 publications

Genomic linkage of male song and female acoustic preference QTL underlying a rapid species radiation

Genomic linkage of male song and female acoustic preference QTL underlying a rapid species radiation

Molecular Diversity, Structure and Domestication of Grasses

Analysis of plastid and mitochondrial DNA insertions in the nucleus (NUPTs and NUMTs) of six plant species: size, relative age and chromosomal localization

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