Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)

The water-hyacinth grasshopper, Cornops aquaticum, occurs in freshwater environments in the New World between latitudes 23°N and 35°S. At the southernmost margin of this distribution the populations are polymorphic for three centric fusions (Robertsonian translocations). The frequencies of these chr...

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Detalles Bibliográficos
Autores principales: Colombo, P.C., Remis, M.I.
Formato: JOUR
Materias:
Acrididae
Centric fusions
Chromosomal clines
Cornops aquaticum
Grasshoppers
Morphometric effects
Orthoptera
freshwater environment
grasshopper
morphology
morphometry
pest species
phenotype
polymorphism
population distribution
translocation
Parana River
Uruguay River
Eichhornia crassipes
Robertsonia
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_12105759_v115_n_p303_Colombo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_12105759_v115_n_p303_Colombo
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spelling todo:paper_12105759_v115_n_p303_Colombo2023-10-03T16:09:02Z Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae) Colombo, P.C. Remis, M.I. Acrididae Centric fusions Chromosomal clines Cornops aquaticum Grasshoppers Morphometric effects Orthoptera freshwater environment grasshopper morphology morphometry pest species phenotype polymorphism population distribution translocation Parana River Uruguay River Acrididae Cornops aquaticum Eichhornia crassipes Orthoptera Robertsonia The water-hyacinth grasshopper, Cornops aquaticum, occurs in freshwater environments in the New World between latitudes 23°N and 35°S. At the southernmost margin of this distribution the populations are polymorphic for three centric fusions (Robertsonian translocations). The frequencies of these chromosome rearrangements increase southwards and the recombination in structural homozygotes and heterozygotes diminishes both along the middle and lower courses of the Paraná River. In the present paper we report a similar cline along the southward flowing Uruguay River. In addition, we report the morphological effects of two of these centric fusion polymorphisms, namely the fusions between chromosomes 2 and 5 of the standard complement (fusion 2/5) and chromosomes 3 and 4 (fusion 3/4) and extend this study to the Uruguay River. There is a strong inverse correlation of fusion frequency with temperature, which indicates that these polymorphisms may be related to increased tolerance of colder climates in this originally tropical species, or some other correlated variable. This study is a further example of chromosomal clines correlated with latitude and is one of a few examples of chromosome polymorphisms associated with phenotypic effects. Finally, it indicates ways of using this species for controlling pests. © Institute of Entomology, Biology Centre, Czech Academy of Sciences, České Budějovice. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_12105759_v115_n_p303_Colombo
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Acrididae
Centric fusions
Chromosomal clines
Cornops aquaticum
Grasshoppers
Morphometric effects
Orthoptera
freshwater environment
grasshopper
morphology
morphometry
pest species
phenotype
polymorphism
population distribution
translocation
Parana River
Uruguay River
Acrididae
Cornops aquaticum
Eichhornia crassipes
Orthoptera
Robertsonia
spellingShingle Acrididae
Centric fusions
Chromosomal clines
Cornops aquaticum
Grasshoppers
Morphometric effects
Orthoptera
freshwater environment
grasshopper
morphology
morphometry
pest species
phenotype
polymorphism
population distribution
translocation
Parana River
Uruguay River
Acrididae
Cornops aquaticum
Eichhornia crassipes
Orthoptera
Robertsonia
Colombo, P.C.
Remis, M.I.
Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
topic_facet Acrididae
Centric fusions
Chromosomal clines
Cornops aquaticum
Grasshoppers
Morphometric effects
Orthoptera
freshwater environment
grasshopper
morphology
morphometry
pest species
phenotype
polymorphism
population distribution
translocation
Parana River
Uruguay River
Acrididae
Cornops aquaticum
Eichhornia crassipes
Orthoptera
Robertsonia
description The water-hyacinth grasshopper, Cornops aquaticum, occurs in freshwater environments in the New World between latitudes 23°N and 35°S. At the southernmost margin of this distribution the populations are polymorphic for three centric fusions (Robertsonian translocations). The frequencies of these chromosome rearrangements increase southwards and the recombination in structural homozygotes and heterozygotes diminishes both along the middle and lower courses of the Paraná River. In the present paper we report a similar cline along the southward flowing Uruguay River. In addition, we report the morphological effects of two of these centric fusion polymorphisms, namely the fusions between chromosomes 2 and 5 of the standard complement (fusion 2/5) and chromosomes 3 and 4 (fusion 3/4) and extend this study to the Uruguay River. There is a strong inverse correlation of fusion frequency with temperature, which indicates that these polymorphisms may be related to increased tolerance of colder climates in this originally tropical species, or some other correlated variable. This study is a further example of chromosomal clines correlated with latitude and is one of a few examples of chromosome polymorphisms associated with phenotypic effects. Finally, it indicates ways of using this species for controlling pests. © Institute of Entomology, Biology Centre, Czech Academy of Sciences, České Budějovice.
format JOUR
author Colombo, P.C.
Remis, M.I.
author_facet Colombo, P.C.
Remis, M.I.
author_sort Colombo, P.C.
title Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
title_short Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
title_full Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
title_fullStr Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
title_full_unstemmed Phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, Cornops aquaticum (Orthoptera: Acrididae)
title_sort phenotypic pattern over centric fusion clinal variation in the water-hyacinth grasshopper, cornops aquaticum (orthoptera: acrididae)
url http://hdl.handle.net/20.500.12110/paper_12105759_v115_n_p303_Colombo
work_keys_str_mv AT colombopc phenotypicpatternovercentricfusionclinalvariationinthewaterhyacinthgrasshoppercornopsaquaticumorthopteraacrididae
AT remismi phenotypicpatternovercentricfusionclinalvariationinthewaterhyacinthgrasshoppercornopsaquaticumorthopteraacrididae
_version_ 1782029903798992896

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