NDLI: Studies of male and female meiosis in inv(4)(p1.4;q2.3) pig carriers

Content Provider	Springer Nature Link
Author	Massip, Katia Yerle, Martine Billon, Yvon Ferchaud, Stéphane Bonnet, Nathalie Calgaro, Anne Mary, Nicolas Dudez, Anne Marie Sentenac, Céline Plard, Christophe Ducos, Alain Pinton, Alain
Copyright Year	2010
Abstract	Inversions are well-known structural chromosomal rearrangements in humans and pigs. Such rearrangements generally have no effect on the carrier's phenotype. However, the presence of an inversion may impair spermatogenesis and lead to the production of recombinant gametes, responsible for early miscarriages, stillbirth, or congenital abnormalities. This is the first report on meiotic segregation and pairing behavior of the inv(4)(p1.4;q2.3) pericentric inversion in pigs. Despite the very large size of the inverted fragment (76% of the chromosome), SpermFISH results showed that only 4.08% of the gametes produced by male heterozygotes were unbalanced. This low proportion could be explained by the particular behavior of normal and inverted SSC4 chromosomes during the initial stages of meiosis. Indeed, immunohistochemistry analyses revealed that heterosynapsis occurred in 92% of the cells, whereas synaptic adjustment was detected in a few spermatocytes only. Unexpectedly, the proportion of unbalanced gametes produced by female heterozygotes, estimated by FISH on metaphase II oocytes, was also very low (3.69%) and comparable to that in males. According to previous results for male and female meiotic processes, different proportions of recombinant gametes in the two genders would have been expected. Complementary studies should be carried out to further document the meiotic behavior of inversions in pigs.
Starting Page	925
Ending Page	938
Page Count	14
File Format	PDF
ISSN	09673849
Journal	Chromosome Research
Volume Number	18
Issue Number	8
e-ISSN	15736849
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-12-02
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pericentric inversions pig SpermFISH immunohistochemistry meiotic segregation pairing behavior Plant Genetics & Genomics Animal Genetics and Genomics Human Genetics Cell Biology
Content Type	Text
Resource Type	Article
Subject	Genetics

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