Abstract
A previous study showed that in the haplodiploid solitary wasp Trypoxylon albitarse, most individuals carry one B chromosome per haploid genome, the same dosage as the standard (A) chromosomes, indicating a possible regularization of B-chromosome meiotic behaviour and its integration into the A genome. In a new sampling, we have analysed 15 populations (including 9 out of the 10 previously analysed) to test the evolution of this integration process. The new results provide a direct report of the invasion process in the Porto Firme population, where B frequency has dramatically increased in only four generations. In the populations from the Viçosa region, however, B frequency has remained stable, although the principal B type, the metacentric one, has increased in frequency at the expense of the acrocentric one in several populations. The implications of these new results on the hypothesis of the integration of these B chromosomes, as regular members of the A genome, are discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 1475-1478 |
| Number of pages | 4 |
| Journal | Proceedings of the Royal Society B: Biological Sciences |
| Volume | 269 |
| Issue number | 1499 |
| DOIs | |
| State | Published - Jul 22 2002 |
| Externally published | Yes |
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All Science Journal Classification (ASJC) codes
- Agricultural and Biological Sciences(all)
- Agricultural and Biological Sciences (miscellaneous)
Cite this
Integration of a B chromosome into the A genome of a wasp, revisited. / Rocha-Sanchez, Sonia; Pompolo, S. G.; Perfectti, F.; Camacho, J. P M.
In: Proceedings of the Royal Society B: Biological Sciences, Vol. 269, No. 1499, 22.07.2002, p. 1475-1478.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Integration of a B chromosome into the A genome of a wasp, revisited
AU - Rocha-Sanchez, Sonia
AU - Pompolo, S. G.
AU - Perfectti, F.
AU - Camacho, J. P M
PY - 2002/7/22
Y1 - 2002/7/22
N2 - A previous study showed that in the haplodiploid solitary wasp Trypoxylon albitarse, most individuals carry one B chromosome per haploid genome, the same dosage as the standard (A) chromosomes, indicating a possible regularization of B-chromosome meiotic behaviour and its integration into the A genome. In a new sampling, we have analysed 15 populations (including 9 out of the 10 previously analysed) to test the evolution of this integration process. The new results provide a direct report of the invasion process in the Porto Firme population, where B frequency has dramatically increased in only four generations. In the populations from the Viçosa region, however, B frequency has remained stable, although the principal B type, the metacentric one, has increased in frequency at the expense of the acrocentric one in several populations. The implications of these new results on the hypothesis of the integration of these B chromosomes, as regular members of the A genome, are discussed.
AB - A previous study showed that in the haplodiploid solitary wasp Trypoxylon albitarse, most individuals carry one B chromosome per haploid genome, the same dosage as the standard (A) chromosomes, indicating a possible regularization of B-chromosome meiotic behaviour and its integration into the A genome. In a new sampling, we have analysed 15 populations (including 9 out of the 10 previously analysed) to test the evolution of this integration process. The new results provide a direct report of the invasion process in the Porto Firme population, where B frequency has dramatically increased in only four generations. In the populations from the Viçosa region, however, B frequency has remained stable, although the principal B type, the metacentric one, has increased in frequency at the expense of the acrocentric one in several populations. The implications of these new results on the hypothesis of the integration of these B chromosomes, as regular members of the A genome, are discussed.
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U2 - 10.1098/rspb.2002.2040
DO - 10.1098/rspb.2002.2040
M3 - Article
VL - 269
SP - 1475
EP - 1478
JO - Proceedings of the Royal Society B: Biological Sciences
JF - Proceedings of the Royal Society B: Biological Sciences
SN - 0962-8452
IS - 1499
ER -