An adaptive explanation for geographically structured allozyme variation inDichroplus elongatus (Orthoptera: Acrididae)

Sequeira, Andrea S.; Confalonieri, Viviana A.; Vilardi, Juan C.

doi:10.1007/bf02931767

Cited by 3 publications

(3 citation statements)

References 23 publications

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“…On the other hand, the high value of genetic diversity observed in the low-level populations from the MMS and PRG is consistent with some data provided in the literature (Muller-Starck 1995, Curtu et al 2009), but other studies indicate no variation allele frequency patterns along altitude or latitude in Norway spruce populations, particularly in a small geographical region (Konnert 1991, Korshikov & Privalikhin 2007. If we accept the lack of total neutrality of allozyme loci, an idea that is supported in some papers (Bush & Smouse 1992, Sequeira et al 1997, Sulkowska 2012, we can invoke the selective environmental pressure effect in determining the less diversity in high-altitude populations. In addition, concerning the narrow-crown spruce in APS-2 population, which is a biotype that reveals a very good resistance to winds and heavy snow (Pârnuţă 2008), its high genetic diversity could be linked to a specifi city of mating system in combination with the natural selection pressure that preserves a high level of heterozygosity.…”

Section: Discussionmentioning

confidence: 93%

Genetic diversity of Norway spruce [Picea abies (L.) Karst.] in Romanian Carpathians

et al. 2014

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Abstract. The genetic diversity of Romanian most important coniferous tree species, the Norway spruce, was estimated by means of allozyme markers. A total of 695 adult trees sampled from eleven populations grouped in six mountainous areas in the Romanian Carpathians were analyzed. In three metapopulations (Maramureş, Postăvar and Parâng), to evaluate the influence of altitudinal gradient on genetic diversity, samples were collected from populations located at high and low altitude. At other location (Apuseni Mountains) we compared the narrow-crown biotype (Picea abies var. columnaris) and the pyramidal crown biotype (Picea abies var. pyramidalis) and explored the genetic structure of peat bog ecotype. By analyzing 7 enzyme systems and 12 enzyme coding loci, a total of 38 allelic variants have been detected. The mean value of polymorphic loci for the six sites was 86.1%, ranging between 83.3% and 91.7% and the mean expected heterozygosity was 0.115, resulting in a moderate level of genetic diversity. The highest genetic diversity (H e = 0.134) was found in the narrow-crown spruce population. Apuseni metapopulation showed the highest genetic diversity (H e = 0.125), being the most valuable for conservation of genetic resources. The small value of fixation index (F ST = 0.009) indicates a low genetic differentiation between the six sites and AMOVA test revealed a very high level of genetic diversity within population (99%). Comparative analysis of genetic parameters showed small differences between high and low altitude populations at each site, probably due to the neutral character of the markers analyzed and the effect of gene flow between gradiental populations.

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Section: Discussionmentioning

confidence: 93%

Genetic diversity of Norway spruce [Picea abies (L.) Karst.] in Romanian Carpathians

et al. 2014

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“…Min-zhao and Le (2001) studied the genetic divergence of the migratory locust by RAPID-PCR and indicated that the isolation-by-distance played an important role in the population divergence, such that the farther the geographical distance between two populations, the larger the genetic distance between them. Similarly, Sequeira et al (1997) reported the effect of geographical organization of the grasshopper on isozymes diversity. The authors have found that the wide range of geographic distribution of Dichroplus elongatus produced great diversity in the isoenzymatic patterns.…”

Section: Discussionmentioning

confidence: 97%

“…A scientific approach to conservation, exploitation and control of plant and animal resources depends upon knowledge of the existence, nature and extent of genetic variability (Sequeira et al 1997). Gaspar et al (2007) and Metcalf et al (1984) reported that the allozyme analysis is an useful molecular marker for insects reconstruction at species and population levels.…”

Section: Discussionmentioning

confidence: 99%

Genetic variability of the tropical grasshopperPoecilocerus bufoniusin Saudi Arabia

Elsayed

Amer

Sayed

2011

Archives Of Phytopathology And Plant Protection

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Electrophoresis for SDS-proteins and isoenzymes was applied to investigate the genetic variability within the tropical grasshopper Poecilocerus bufonius, which inhabits Saudi Arabia. Samples were selected from different localities that are encompassing the Sarawat Mountains in the west and An-Nafud desert in the north and middle. A range of 2 to 14 protein bands were recorded in the studied samples as measured by SDS-polyacrylamide gel electrophoresis, from which only two were common. The maximum number of protein bands has been recorded in the samples from the west and the minimum number has been recorded in the samples from the north and middle. Six arbitrary chosen enzymes were examined by native-polyacrylamide gel electrophoresis. They were peroxidase (Px), aldehyde oxidase (Ao), acid phosphatase (Acph), alcohol dehydrogenase (Adh), a´and aˆePsterase (Est). Fourteen presumptive gene loci and 26 polymorphic alleles have been recorded with the highest number of alleles in Taif and minimum number of alleles in Qassim. Adh, Px and Acph have not been recorded in samples from the localities of An-Nafud desert. The samples from Taif (Sarawat Mountains) were more genetically variable than the samples from other localities. Most of alleles were monomeric but only the Px-1 showed trimeric alleles in samples from Taif.

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Mitochondrial DNA Variation in the South American Grasshopper <I>Dichroplus elongatus</I> (Orthoptera: Acrididae)

Clemente

Remis

Vilardi

2000

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An adaptive explanation for geographically structured allozyme variation inDichroplus elongatus (Orthoptera: Acrididae)

Cited by 3 publications

References 23 publications

Genetic diversity of Norway spruce [Picea abies (L.) Karst.] in Romanian Carpathians

Genetic diversity of Norway spruce [Picea abies (L.) Karst.] in Romanian Carpathians

Genetic variability of the tropical grasshopperPoecilocerus bufoniusin Saudi Arabia

Mitochondrial DNA Variation in the South American Grasshopper <I>Dichroplus elongatus</I> (Orthoptera: Acrididae)

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