A Linkage Map Reveals a Complex Basis for Segregation Distortion in an Interpopulation Cross in the Moss <i>Ceratodon purpureus</i>

McDaniel, Stuart F.; Willis, John H.; Shaw, A. Jonathan

doi:10.1534/genetics.107.075424

Cited by 138 publications

(140 citation statements)

References 67 publications

Supporting

Mentioning

133

Contrasting

Order By: Relevance

“…It should therefore be ideal for mapping PAR genes and testing these ideas. PAR genes of such species, including several plants (Liu et al 2004;McDaniel et al 2007;Spigler et al 2008), could thus be used to search for evidence of SA polymorphisms. However, detailed genetic maps are available in few dioecious plants.…”

mentioning

confidence: 99%

Expansion of the Pseudo-autosomal Region and Ongoing Recombination Suppression in the Silene latifolia Sex Chromosomes

Bergero

Qiu

Forrest³

et al. 2013

Genetics

122

View full text Add to dashboard Cite

There are two very interesting aspects to the evolution of sex chromosomes: what happens after recombination between these chromosome pairs stops and why suppressed recombination evolves. The former question has been intensively studied in a diversity of organisms, but the latter has been studied largely theoretically. To obtain empirical data, we used codominant genic markers in genetic mapping of the dioecious plant Silene latifolia, together with comparative mapping of S. latifolia sex-linked genes in S. vulgaris (a related hermaphrodite species without sex chromosomes). We mapped 29 S. latifolia fully sex-linked genes (including 21 newly discovered from transcriptome sequencing), plus 6 genes in a recombining pseudo-autosomal region (PAR) whose genetic map length is 25 cM in both male and female meiosis, suggesting that the PAR may contain many genes. Our comparative mapping shows that most fully sex-linked genes in S. latifolia are located on a single S. vulgaris linkage group and were probably inherited from a single autosome of an ancestor. However, unexpectedly, our maps suggest that the S. latifolia PAR region expanded through translocation events. Some genes in these regions still recombine in S. latifolia, but some genes from both addition events are now fully sex-linked. Recombination suppression is therefore still ongoing in S. latifolia, and multiple recombination suppression events have occurred in a timescale of few million years, much shorter than the timescale of formation of the most recent evolutionary strata of mammal and bird sex chromosomes. It is now understood that the large nonrecombining regions of sex chromosomes in mammals have expanded over evolutionary time, forming "evolutionary strata" with differing levels of sequence divergence between X-and Y-gene pairs, from ancient highly diverged regions, to regions in which the genes started diverging much more recently, which are located closest to the pseudo-autosomal region (PAR) on the X chromosome genetic and physical maps (Lahn and Page 1999;Skaletsky et al. 2003;Marais et al. 2008). The more recent evolutionary strata were formed by recombination suppression in regions formed by an addition of autosomal genetic material to the sex chromosomes (Waters et al. 2001), demonstrating that suppressed recombination spread from the ancestral sex chromosomal region into initially recombining regions. The PAR is shared across Eutherian mammals (despite differences in its boundary and the recent addition of a second PAR, PAR2, in humans), which is a physically small remnant of the added region, which is still autosomal in marsupials (Waters et al. 2001).The major current explanation for the evolution of expanded nonrecombining regions of sex chromosomes is

show abstract

mentioning

confidence: 99%

Expansion of the Pseudo-autosomal Region and Ongoing Recombination Suppression in the Silene latifolia Sex Chromosomes

Bergero

Qiu

Forrest³

et al. 2013

Genetics

122

View full text Add to dashboard Cite

show abstract

“…Cronberg and Natcheva 2002). If hybridisation explains the 'incorrect' placements of D. turgescens PT1088 and D. lycopodioides PT190 in the plastid network, then the maternal parent must have been D. lycopodioides in the first case, and D. turgescens in the second since, as far as we know, chloroplasts are maternally inherited in bryophytes (Duckett et al 1983;McDaniel et al 2007;Natcheva and Cronberg 2007a). Besides hybridisation and introgression, horizontal chloroplast transfer has been shown to occur (Cristina Acosta and Premoli 2010;Stegemann et al 2012), although this has not yet been shown to occur in bryophytes.…”

Section: Discussionmentioning

confidence: 99%

Three molecular markers suggest different relationships among three Drepanocladus species (Bryophyta: Amblystegiaceae)

Hedenäs

2017

Plant Syst Evol

View full text Add to dashboard Cite

Relationships among numerous specimens of Drepanocladus angustifolius (35 specimens), Drepanocladus lycopodioides (71 specimens), and Drepanocladus turgescens (102 specimens) are analysed based on the nuclear internal transcribed spacers 1 and 2 (ITS) and a portion of glyceraldehyde 3-phosphate dehydrogenase (gpd), and the plastid rpl16 G2 intron. Molecular data suggest that neither species is monophyletic as well as significant incongruence among molecular markers. No statistical support for recombination (ITS, gpd) was found. For some D. lycopodioides and D. turgescens specimens, the molecular information even suggests that they belong to the wrong one of these two species. All such specimens were collected in south Swedish areas where the two species are frequently found growing together and where sporophytes are often common. The occurrence of all such specimens only in these geographical areas is statistically unlikely and suggests that hybridisation occasionally occurs here. While molecular information suggests that the species are not monophyletic, geographical signals could be found for both D. angustifolius and D. turgescens.

show abstract

“…Fusarium subglutinans alleles could have had fewer negative interactions with the hybrid genetic background, than those of F. circinatum (Burke and Arnold 2001;Myburg et al 2004). This genic incompatibility is characterized by the proper functioning of alleles in their separate genetic backgrounds, but these alleles can become incompatible when brought together in a hybrid (McDaniel et al 2007). The observed bias could also be due to increased viability of ascospores containing F. subglutinans alleles.…”

Section: Discussionmentioning

confidence: 99%

Transmission ratio distortion in an interspecific cross between Fusarium circinatum and Fusarium subglutinans

et al. 2013

View full text Add to dashboard Cite

Previously, an interspecific cross between Fusarium circinatum and Fusarium subglutinans was used to generate a genetic linkage map. A ca. 55 % of genotyped markers displayed transmission ratio distortion (TRD) that demonstrated a genome-wide distribution. The working hypothesis for this study was that TRD would be nonrandomly distributed throughout the genetic linkage map. This would indicate the presence of distorting loci. Using a genome-wide threshold of a = 0.01, 79 markers displaying TRD were distributed on all 12 linkage groups (LGs). Eleven putative transmission ratio distortion loci (TRDLs), spanning eight LGs, were identified in regions containing three or more adjacent markers displaying distortion. No epistatic interactions were observed between these TRDLs. Thus, it is uncertain whether the genome-wide TRD was due to linkage between markers and genomic regions causing distortion. The parental origins of markers followed a non-random distribution throughout the linkage map, with LGs containing stretches of markers originating from only one parent. Thus, due to the nature of the interspecific cross, the current hypothesis to explain these observations is that the observed genome-wide segregation was caused by the high level of genomic divergence between the parental isolates. Therefore, homologous chromosomes do not align properly during meiosis, resulting in aberrant transmission of markers. This also explains previous observations of the preferential transmission of F. subglutinans alleles to the F 1 progeny.

show abstract

A Linkage Map Reveals a Complex Basis for Segregation Distortion in an Interpopulation Cross in the Moss Ceratodon purpureus

Cited by 138 publications

References 67 publications

Expansion of the Pseudo-autosomal Region and Ongoing Recombination Suppression in the Silene latifolia Sex Chromosomes

Expansion of the Pseudo-autosomal Region and Ongoing Recombination Suppression in the Silene latifolia Sex Chromosomes

Three molecular markers suggest different relationships among three Drepanocladus species (Bryophyta: Amblystegiaceae)

Transmission ratio distortion in an interspecific cross between Fusarium circinatum and Fusarium subglutinans

Contact Info

Product

Resources

About