Artículo
Colombo, P.C. "Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before" (2000) Hereditas. 133(3):189-193
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Abstract:
Deviation from formal null models and the comparisons between age classes are amongst the most direct methods of demonstrating ongoing natural selection. We have sampled 207 males from a population of the grasshopper Leptysma argentina at the onset and the end of the adult life span for this species; generations are synchronical and do not overlap. The karyotypic frequencies for a fusion (F) and a supernumerary segment (s1) were examined. The young male sample was heterogeneous and did not fit to the Hardy-Weinberg proportions, whereas the aged male sample did not deviate from H-W expectations in both analyses. Likewise, the young male sample showed fitness heterosis for the s1 carriers that are fusion homozygotes. We interpreted the significant results of karyotype frequency in both samples as the result of survival selection. Evidently natural selection acts on male adult viability as well as on other fitness components prior to adult survival, thus changing karyotype frequencies between generations. Likewise, we also detected a strong interaction between polymorphisms, whereas heterosis for s1 heterozygotes might be contributing to the maintenance of the s1 polymorphism. The actual target of selection remains unidentified.
Registro:
| Documento: | Artículo |
| Título: | Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before |
| Autor: | Colombo, P.C. |
| Filiación: | Departamento de Ciencias Biologicas, Fac. de Ciencias Exactas y Naturales, Universidad de Buenos Aires, 1428 Ciudad Universitaria, Buenos Aires, Argentina |
| Palabras clave: | animal cell; animal experiment; article; biological model; cell synchronization; cell viability; chromosome polymorphism; controlled study; fusion gene; gene frequency; genetic analysis; genetic heterogeneity; grasshopper; heterosis; heterozygote; homozygote; karyotyping; lifespan; male; natural population; natural selection; nonhuman; Orthoptera; population genetics; supernumerary chromosome; survival time; Animals; Chromosomes; Genetics, Population; Germ Cells; Grasshoppers; Heterozygote; Homozygote; Karyotyping; Male; Models, Genetic; Polymorphism, Genetic; Selection (Genetics); Animalia; Insecta; Leptysma; Leptysma argentina; Orthoptera |
| Año: | 2000 |
| Volumen: | 133 |
| Número: | 3 |
| Página de inicio: | 189 |
| Página de fin: | 193 |
| Título revista: | Hereditas |
| Título revista abreviado: | Hereditas |
| ISSN: | 00180661 |
| CODEN: | HEREA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v133_n3_p189_Colombo |
Referencias:
- Colombo, P.C., Chromosome polymorphisms affecting recombination and exophenotypic traits in Leptysma argentina (Orthoptera): A populational survey (1989) Heredity, 62, pp. 289-299
- Colombo, P.C., Effects of centric fusions on chiasma frequency and position in Leptysma argentina (Acrididae: Orthoptera). II. Intra- and interchromosome effects (1990) Caryologia, 43, pp. 131-147
- Colombo, P.C., Supernumerary segments of a bivalent of Leptysma argentina (Orthoptera): Intra- and interchromosome chiasma effects (1992) Caryologia, 45, pp. 283-299
- Colombo, P.C., A polymorphic centric fusion enhances chiasma interference in Leptysma argentina (Orthoptera): A chiasma distribution study (1993) Heredity, 70, pp. 254-265
- Colombo, P.C., Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). I. Correlation with geographical, climatic and temporal variables (1993) Evolución Biológica (ASIBE), 7, pp. 21-29
- Colombo, P.C., Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). II. Gametic phase disequilibrium and differential adult male viability (1993) Heredity, 71, pp. 295-299
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- Lewontin, R.C., Kojima, K., The evolutionary dynamics of complex polymorphisms (1960) Evolution, 14, pp. 458-472
- Norry, F.M., Colombo, P.C., Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera): External phenotype affected by a centric fusion predicts adult survival (1999) J. Genet., 78, pp. 57-62
Citas:
---------- APA ----------
(2000) . Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before. Hereditas, 133(3), 189-193.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v133_n3_p189_Colombo [ ]
---------- CHICAGO ----------
Colombo, P.C. "Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before" . Hereditas 133, no. 3 (2000) : 189-193.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v133_n3_p189_Colombo [ ]
---------- MLA ----------
Colombo, P.C. "Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before" . Hereditas, vol. 133, no. 3, 2000, pp. 189-193.Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v133_n3_p189_Colombo [ ]
---------- VANCOUVER ----------
Colombo, P.C. Chromosome polymorphisms and natural selection in Leptysma argentina (Orthoptera). IV. Survival selection acts on karyotype polymorphisms at the adult stage and before. Hereditas. 2000;133(3):189-193.Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00180661_v133_n3_p189_Colombo [ ]
