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The B chromosome polymorphism of the grasshopper Eyprepocnemis plorans in North Africa. IV. Transmission of rare B chromosome variants.
Cytogenet Genome Res. 2004; 106(2-4):332-7.CG

Abstract

In addition to the principal B chromosome (B(1)) in Moroccan populations of the grasshopper Eyprepocnemis plorans, nine B chromosome variants appeared at low frequency. The transmission of five of these rare B chromosome variants through females was analysed in three natural populations. Sixteen controlled crosses provided useful information on the transmission of B(M2), B(M6) and B(M7) in Smir, B(M3) and B(M6) in SO.DE.A. (Société de Développement Agricole lands near Ksar-el-Kebir city), and B(M2) and B(M10) in Mechra, all located in Morocco. Since six female parents carried two different B variants, a total of 22 progeny analyses could be studied. Intraindividual variation in B transmission rate (k(B)) was observed among the successive egg pods in 26.7 % of the females, but this variation did not show a consistent temporal pattern. Only the B(M2) and B(M6) variants in Smir showed net drive, although variation was high among crosses, especially for B(M2). These two variants are thus good candidates for future regenerations (the replacement of a neutralized B, B(1) in this case, by a new driving variant, B(M2) or B(M6)) in Smir, the northern population where the B polymorphism is presumably older. The analysis of all crosses performed in the three populations, including those reported previously for the analysis of B(1) transmission, showed that the largest variance in k(B) among crosses stands at the individual level, and not at population or type of B levels. The implications of these findings for the occurrence of possible regeneration processes in Moroccan populations are discussed.

Authors+Show Affiliations

Institute of Genetics, Queen's Medical Centre, University of Nottingham, Nottingham, England. M.Bakkali@nottingham.ac.ukNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15292612

Citation

Bakkali, M, and J P M. Camacho. "The B Chromosome Polymorphism of the Grasshopper Eyprepocnemis Plorans in North Africa. IV. Transmission of Rare B Chromosome Variants." Cytogenetic and Genome Research, vol. 106, no. 2-4, 2004, pp. 332-7.
Bakkali M, Camacho JP. The B chromosome polymorphism of the grasshopper Eyprepocnemis plorans in North Africa. IV. Transmission of rare B chromosome variants. Cytogenet Genome Res. 2004;106(2-4):332-7.
Bakkali, M., & Camacho, J. P. (2004). The B chromosome polymorphism of the grasshopper Eyprepocnemis plorans in North Africa. IV. Transmission of rare B chromosome variants. Cytogenetic and Genome Research, 106(2-4), 332-7.
Bakkali M, Camacho JP. The B Chromosome Polymorphism of the Grasshopper Eyprepocnemis Plorans in North Africa. IV. Transmission of Rare B Chromosome Variants. Cytogenet Genome Res. 2004;106(2-4):332-7. PubMed PMID: 15292612.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The B chromosome polymorphism of the grasshopper Eyprepocnemis plorans in North Africa. IV. Transmission of rare B chromosome variants. AU - Bakkali,M, AU - Camacho,J P M, PY - 2003/09/15/received PY - 2003/10/29/accepted PY - 2004/8/5/pubmed PY - 2005/2/5/medline PY - 2004/8/5/entrez SP - 332 EP - 7 JF - Cytogenetic and genome research JO - Cytogenet. Genome Res. VL - 106 IS - 2-4 N2 - In addition to the principal B chromosome (B(1)) in Moroccan populations of the grasshopper Eyprepocnemis plorans, nine B chromosome variants appeared at low frequency. The transmission of five of these rare B chromosome variants through females was analysed in three natural populations. Sixteen controlled crosses provided useful information on the transmission of B(M2), B(M6) and B(M7) in Smir, B(M3) and B(M6) in SO.DE.A. (Société de Développement Agricole lands near Ksar-el-Kebir city), and B(M2) and B(M10) in Mechra, all located in Morocco. Since six female parents carried two different B variants, a total of 22 progeny analyses could be studied. Intraindividual variation in B transmission rate (k(B)) was observed among the successive egg pods in 26.7 % of the females, but this variation did not show a consistent temporal pattern. Only the B(M2) and B(M6) variants in Smir showed net drive, although variation was high among crosses, especially for B(M2). These two variants are thus good candidates for future regenerations (the replacement of a neutralized B, B(1) in this case, by a new driving variant, B(M2) or B(M6)) in Smir, the northern population where the B polymorphism is presumably older. The analysis of all crosses performed in the three populations, including those reported previously for the analysis of B(1) transmission, showed that the largest variance in k(B) among crosses stands at the individual level, and not at population or type of B levels. The implications of these findings for the occurrence of possible regeneration processes in Moroccan populations are discussed. SN - 1424-859X UR - https://www.unboundmedicine.com/medline/citation/15292612/The_B_chromosome_polymorphism_of_the_grasshopper_Eyprepocnemis_plorans_in_North_Africa__IV__Transmission_of_rare_B_chromosome_variants_ L2 - https://www.karger.com?DOI=10.1159/000079308 DB - PRIME DP - Unbound Medicine ER -