geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

A screen for recessive speciation genes expressed in the gametes of F1 hybrid yeast


, : A screen for recessive speciation genes expressed in the gametes of F1 hybrid yeast. Plos Genetics 3(2): E21-E21

Diploid hybrids of Saccharomyces cerevisiae and its closest relative, Saccharomyces paradoxus, are viable, but the sexual gametes they produce are not. One of several possible causes of this gamete inviability is incompatibility between genes from different species-such incompatible genes are usually called "speciation genes.'' In diploid F1 hybrids, which contain a complete haploid genome from each species, the presence of compatible alleles can mask the effects of ( recessive) incompatible speciation genes. But in the haploid gametes produced by F1 hybrids, recessive speciation genes may be exposed, killing the gametes and thus preventing F1 hybrids from reproducing sexually. Here I present the results of an experiment to detect incompatibilities that kill hybrid gametes. I transferred nine of the 16 S. paradoxus chromosomes individually into S. cerevisiae gametes and tested the ability of each to replace its S. cerevisiae homeolog. All nine chromosomes were compatible, producing nine viable haploid strains, each with 15 S. cerevisiae chromosomes and one S. paradoxus chromosome. Thus, none of these chromosomes contain speciation genes that were capable of killing the hybrid gametes that received them. This is a surprising result that suggests that such speciation genes do not play a major role in yeast speciation.

US$19.90

PMID: 17305429

DOI: 10.1371/journal.pgen.0030021


Other references

Cangi, Nídia.; Pinarello, Vérie.; Bournez, L.; Lefrançois, T.; Albina, E.; Neves, Lís.; Vachiéry, N., 2017: Efficient high-throughput molecular method to detect Ehrlichia ruminantium in ticks. Ehrlichia ruminantium is the causal agent of heartwater, a fatal tropical disease affecting ruminants with important economic impacts. This bacterium is transmitted by Amblyomma ticks and is present in sub-Saharan Africa, islands in the Indian Oce...

Anonymous, 1957: New standard of excellence for Africander cattle. The new breed standard as proposed by the Africander Cattle Breeders' Society is set out and details of variations and deviations are included. The new score-card makes good the defects of the old one. M. N.

Yoshvin, S.; Southern, E.P.; Wang, Y., 2016: Surgical treatment of congenital patellar dislocation in skeletally mature patients: surgical technique and case series. Congenital patellar dislocation is a rarely encountered condition and is readily treated in childhood to prevent lasting disability, knee pain, decreased range of motion and ambulation problems. This condition is very rarely seen in skeletally mat...

Zhao, M.; Zhou, H-Ying.; Xu, J.; Zhang, F.; Wei, W-Bin.; Liu, N-Pu., 2017: Combined photodynamic therapy and ranibizumab for polypoidal choroidal vasculopathy: a 2-year result and systematic review. To report a cohort of patients with polypoidal choroidal vasculopathy (PCV) treated with photodynamic therapy (PDT) followed by intravitreal ranibizumab injection 24-48h later, and to compare the results between eyes with PCV treated by PDT follow...

Zaider, M.; Brenner, D.J., 1984: Comments on "V79 survival following simultaneous or sequential irradiation by 15-MeV neutrons and 60Co photons". Radiation Research 99(2): 438-441

Chenyak V.Ya; Furman V.Ya, 1979: New variant of the auto calibration method of sedimentation equilibrium ideal solutions of homogeneous proteins. Doklady Biochemistry 248(1-6): 320-322

Krusche, S.; Escher, F., 1989: Euphorbia pulcherrima. Alternatives to young rooted plants. As alternatives to rooted plants for starting a crop of poinsettias, unrooted cuttings, cuttings with callus formed, cuttings with callus and roots formed in Oasis Pinpots, or rooted cuttings in Jiffy-7 pots were given simulated transport conditio...

Tsia, K.; Poon, A., 2004: Dispersion-guided resonances in two-dimensional photonic-crystal-embedded microcavities. We analyze dispersion-based guiding of resonances in two-dimensional (2-D) photonic-crystal-embedded microcavities (PCEMs) that comprise a finite-size square lattice of submicrometer air holes embedded in a high-index contrast square microcavity....

Berthelsen, C.L., 2001: Evaluation of coding data quality of the HCUP National Inpatient Sample. Quality ICD-9-CM coding depends on the selection of the appropriate diagnosis codes and the proper sequencing of the codes. A simple, diagnosis code-sequencing error was selected to evaluate the quality of diagnosis coding within the National Inpa...

Kohno, K.; Matsuo, H.; Takahashi, H.; Niihara, H.; Chinuki, Y.; Kaneko, S.; Honjoh, T.; Horikawa, T.; Mihara, S.; Morita, E., 2013: Serum gliadin monitoring extracts patients with false negative results in challenge tests for the diagnosis of wheat-dependent exercise-induced anaphylaxis. Challenge testing with wheat plus exercise and/or aspirin is a gold standard for the diagnosis of wheat-dependent exercise-induced anaphylaxis (WDEIA); however, the test may often yield false-negative results. Our previous study suggested that an...