Log in

Relevant bibliographies by topics / Clines latitudinals / Journal articles

To see the other types of publications on this topic, follow the link: Clines latitudinals.

Journal articles on the topic 'Clines latitudinals'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Clines latitudinals.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Günter, Franziska, Michaël Beaulieu, Massimo Brunetti, Lena Lange, Angela Schmitz Ornés, and Klaus Fischer. "Latitudinal and altitudinal variation in ecologically important traits in a widespread butterfly." Biological Journal of the Linnean Society 128, no. 3 (October 1, 2019): 742–55. http://dx.doi.org/10.1093/biolinnean/blz133.

Full text

Abstract:

Abstract Understanding how organisms adapt to complex environments lies at the very heart of evolutionary biology and ecology, and is of particular concern in the current era of anthropogenic global change. Variation in ecologically important traits associated with environmental gradients is considered to be strong evidence for adaptive responses. Here, we study phenotypic variation along a latitudinal and an altitudinal cline in 968 field-collected males of the widespread European butterfly Pieris napi. In contrast to our expectations, body size decreased with increasing latitude and altitude, suggesting that warmer rather than cooler conditions may be more beneficial for individual development in this species. Higher altitudes but not latitudes seemed to be associated with increased flight performance, suggesting stronger challenges for flight activity in high-altitude environments (e.g. due to strong wind). Moreover, wing melanization increased while yellow reflectance decreased towards colder environments in both clines. Thus, increased melanization under thermally challenging conditions seems to compromise investment into a sexually selected trait, resulting in a trade-off. Our study, although exclusively based on field-collected males, revealed indications of adaptive patterns along geographical clines. It documents the usefulness of field-collected specimens, and the strength of comparing latitudinal and altitudinal clines to identify traits being potentially under thermal selection.

APA, Harvard, Vancouver, ISO, and other styles

2

Stillwell, R. Craig. "Are latitudinal clines in body size adaptive?" Oikos 119, no. 9 (August 23, 2010): 1387–90. http://dx.doi.org/10.1111/j.1600-0706.2010.18670.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Shepherd, Philippa C. F., David B. Lank, Barry D. Smith, Nils Warnock, Gary W. Kaiser, and Tony D. Williams. "Sex Ratios of Dunlin Wintering at Two Latitudes on the Pacific Coast." Condor 103, no. 2 (May 1, 2001): 352–60. http://dx.doi.org/10.1093/condor/103.2.352.

Full text

Abstract:

Abstract Latitudinal clines in sex ratio during the nonbreeding season occur in some shorebirds of the Scolopacidae. We compared populations of nonbreeding Dunlin (Calidris alpina pacifica) from two latitudes along the Pacific flyway: the Fraser River Delta, British Columbia, and Bolinas Lagoon, California, to determine whether, and to what degree, they exhibited sex ratios consistent with a latitudinal cline. Dunlin are plumage monomorphic, so we used a maximum likelihood model to estimate overall and monthly sex ratios for each population based on culmen length distributions. Sex ratios in the Fraser River Delta were corrected for sex differences in habitat use. Monthly sex ratios were similar at the two sites but varied throughout the winter, likely reflecting differences in seasonal movement patterns between the sexes. Both populations showed an overall bias toward males (Fraser = 61% males, Bolinas = 65% males). Since there is no evidence to support the possibility of a skew toward males in C. a. pacifica as a whole, our data are consistent with some form of latitudinal cline in the sex ratio of C. a. pacifica. However, additional data from the Oregon coast, southern California, and Mexico are required to resolve this question. We also tested the hypothesis that mean body size within each sex is larger at the higher-latitude site (Fraser River Delta), but this did not appear to be the case.

APA, Harvard, Vancouver, ISO, and other styles

4

Hut, Roelof A., Silvia Paolucci, Roi Dor, Charalambos P. Kyriacou, and Serge Daan. "Latitudinal clines: an evolutionary view on biological rhythms ,." Proceedings of the Royal Society B: Biological Sciences 280, no. 1765 (August 22, 2013): 20130433. http://dx.doi.org/10.1098/rspb.2013.0433.

Full text

Abstract:

Properties of the circadian and annual timing systems are expected to vary systematically with latitude on the basis of different annual light and temperature patterns at higher latitudes, creating specific selection pressures. We review literature with respect to latitudinal clines in circadian phenotypes as well as in polymorphisms of circadian clock genes and their possible association with annual timing. The use of latitudinal (and altitudinal) clines in identifying selective forces acting on biological rhythms is discussed, and we evaluate how these studies can reveal novel molecular and physiological components of these rhythms.

APA, Harvard, Vancouver, ISO, and other styles

5

Pratt, Jessica D., Andrew Datu, Thi Tran, Daniel C. Sheng, and Kailen A. Mooney. "Genetically based latitudinal clines in Artemisia californica drive parallel clines in arthropod communities." Ecology 98, no. 1 (December 9, 2016): 79–91. http://dx.doi.org/10.1002/ecy.1620.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

McAllister, Bryant F. "Chromosomal and allelic variation in Drosophila americana: selective maintenance of a chromosomal cline." Genome 45, no. 1 (February 1, 2002): 13–21. http://dx.doi.org/10.1139/g01-112.

Full text

Abstract:

Geographically structured genetic variation, as represented by clines and hybrid zones, offers unique opportunities to study adaptation and speciation in natural populations. A hybrid zone has been reported between Drosophila americana americana and Drosophila americana texana, two taxa that are distinguished solely by the arrangement of their X and 4th chromosomes. In this study, samples of D. americana were collected along a latitudinal transect across the inferred hybrid zone, and the frequency of the alternative chromosomal arrangements is reported. These data illustrate that the alternative chromosomal arrangements are distributed along a shallow cline over a broad geographic region, and that the frequency of the arrangements is tightly correlated with latitude. Allelic variants at 13 RFLP loci in three genes on chromosome 4 exhibit no evidence of association with the cline. Presence of a cline for the chromosomal arrangements, as well as a general absence of geographic structure for variation at these genes, is interpreted as evidence that natural selection is responsible for the maintenance of this chromosomal cline. Furthermore, these results demonstrate that taxonomic subdivision of D. americana is unwarranted, because it exists as a cohesive species that is segregating a chromosomal fusion.Key words: chromosomal evolution, Robertsonian fusion, hybrid zone, cline, geographic variation, natural selection.

APA, Harvard, Vancouver, ISO, and other styles

7

Pittendrigh, Colin S., and Tsuguhiko Takamura. "Latitudinal Clines in the Properties of a Circadian Pacemaker." Journal of Biological Rhythms 4, no. 2 (June 1989): 105–23. http://dx.doi.org/10.1177/074873048900400209.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Leong, Wai, Patrick Y. Sun, and Suzanne Edmands. "Latitudinal Clines in Temperature and Salinity Tolerance in Tidepool Copepods." Journal of Heredity 109, no. 1 (July 18, 2017): 71–77. http://dx.doi.org/10.1093/jhered/esx061.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Välimäki, P., S. M. Kivelä, M. I. Mäenpää, and T. Tammaru. "Latitudinal clines in alternative life histories in a geometrid moth." Journal of Evolutionary Biology 26, no. 1 (November 29, 2012): 118–29. http://dx.doi.org/10.1111/jeb.12033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Chown, Steven L., and C. Jaco Klok. "Altitudinal body size clines: latitudinal effects associated with changing seasonality." Ecography 26, no. 4 (August 2003): 445–55. http://dx.doi.org/10.1034/j.1600-0587.2003.03479.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Wielgoss, Sébastien, Aude Gilabert, Axel Meyer, and Thierry Wirth. "Introgressive hybridization and latitudinal admixture clines in North Atlantic eels." BMC Evolutionary Biology 14, no. 1 (2014): 61. http://dx.doi.org/10.1186/1471-2148-14-61.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Pörtner, Hans O., Daniela Storch, and Olaf Heilmayer. "Constraints and trade-offs in climate-dependent adaptation: energy budgets and growth in a latitudinal cline." Scientia Marina 69, S2 (December 30, 2005): 271–85. http://dx.doi.org/10.3989/scimar.2005.69s2271.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

James, Avis C., Ricardo B. R. Azevedo, and Linda Partridge. "Genetic and Environmental Responses to Temperature of Drosophila melanogaster From a Latitudinal Cline." Genetics 146, no. 3 (July 1, 1997): 881–90. http://dx.doi.org/10.1093/genetics/146.3.881.

Full text

Abstract:

Field-collected Drosophila melanogaster from 19 populations in Eastern Australia were measured for body size traits, and the measurements were compared with similar ones on flies from the same populations reared under standard laboratory conditions. Wild caught flies were smaller, and latitudinal trends in size were greater. Reduced size was caused by fewer cells in the wing, and the steeper cline by greater variation in cell area. The reduction in size in field-collected flies may therefore have been caused by reduced nutrition, and the steeper cline may have been caused by an environmental response to latitudinal variation in temperature. No evidence was found for evolution of size traits in response to laboratory culture. The magnitude of phenotypic plasticity in response to temperature of development time, body size, cell size and cell number was examined for six of the populations, to test for latitudinal variation in plasticity. All characters were plastic in response to temperature. Total development time showed no significant latitudinal variation in plasticity, although larval development time showed a marginally significant effect, with most latitudinal variation at intermediate rearing temperatures. Neither thorax length nor wing size and its cellular components showed significant latitudinal variation in plasticity.

APA, Harvard, Vancouver, ISO, and other styles

14

Yamaguchi, Koki, and Shin G. Goto. "Distinct Physiological Mechanisms Induce Latitudinal and Sexual Differences in the Photoperiodic Induction of Diapause in a Fly." Journal of Biological Rhythms 34, no. 3 (April 9, 2019): 293–306. http://dx.doi.org/10.1177/0748730419841931.

Full text

Abstract:

Many temperate insects enter diapause (dormancy) for overwintering in response to short days (long nights). A latitudinal cline in the critical day lengths for the photoperiodic induction of diapause has been reported in various insect species. However, the physiological mechanisms underlying this cline have remained elusive. We approached this issue in the flesh fly Sarcophaga similis, in which the photoperiodic time measurement system meets the “external coincidence model.” In this model, measuring day lengths depends on whether the photoinducible phase (φi), determined by a circadian clock, is exposed to light or not. First, we detected a clear latitudinal cline in the critical day lengths of flies collected from 4 localities at different latitudes. The phase positions of the φi, which can be verified by night interruption photoperiods, also showed a clear latitudinal cline. This result supports the hypothesis that the latitudinal cline in the critical day length is produced by the difference in the phase positions of the φi among different strains. A sexual difference in the critical day length for photoperiodic induction has also been detected in various species. In this study, a sexual difference in the critical day length was observed in the southern strains but there was no sexual difference in the phase positions of the φi. This result indicates that both sexes measure photoperiods in the same manner. Males are less sensitive than females to the light pulse given at the φi, suggesting a quantitative difference in the photoperiodic time measurement and counter systems. This study clearly reveals that distinct mechanisms induce latitudinal and sexual differences in the critical day length for the photoperiodic induction of diapause in a fly.

APA, Harvard, Vancouver, ISO, and other styles

15

Verrelli, Brian C., and Walter F. Eanes. "Clinal Variation for Amino Acid Polymorphisms at thePgmLocus inDrosophila melanogaster." Genetics 157, no. 4 (April 1, 2001): 1649–63. http://dx.doi.org/10.1093/genetics/157.4.1649.

Full text

Abstract:

AbstractClinal variation is common for enzymes in the glycolytic pathway for Drosophila melanogaster and is generally accepted as an adaptive response to different climates. Although the enzyme phosphoglucomutase (PGM) possesses several allozyme polymorphisms, it is unique in that it had been reported to show no clinal variation. Our recent DNA sequence investigation of Pgm found extensive cryptic amino acid polymorphism segregating with the allozyme alleles. In this study, we characterize the geographic variation of Pgm amino acid polymorphisms at the nucleotide level along a latitudinal cline in the eastern United States. A survey of 15 SNPs across the Pgm gene finds significant clinal differentiation for the allozyme polymorphisms as well as for many of the cryptic amino acid polymorphisms. A test of independence shows that pervasive linkage disequilibrium across this gene region can explain many of the amino acid clines. A single Pgm haplotype defined by two amino acid polymorphisms shows the strongest correlation with latitude and the steepest change in allele frequency across the cline. We propose that clinal selection at Pgm may in part explain the extensive amino acid polymorphism at this locus and is consistent with a multilocus response to selection in the glycolytic pathway.

APA, Harvard, Vancouver, ISO, and other styles

16

Durmaz, Esra, Clare Benson, Martin Kapun, Paul Schmidt, and Thomas Flatt. "An inversion supergene in Drosophila underpins latitudinal clines in survival traits." Journal of Evolutionary Biology 31, no. 9 (June 28, 2018): 1354–64. http://dx.doi.org/10.1111/jeb.13310.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Wesselingh, Renate A., Peter G. L. Klinkhamer, Tom J. Jong, and Els G. M. Schlatmann. "A latitudinal cline in vernalization requirement in Cirsium vulgare." Ecography 17, no. 3 (September 1994): 272–77. http://dx.doi.org/10.1111/j.1600-0587.1994.tb00103.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Clarke, Andrew. "Is there a latitudinal diversity cline in the sea?" Trends in Ecology & Evolution 7, no. 9 (September 1992): 286–87. http://dx.doi.org/10.1016/0169-5347(92)90222-w.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Abe, Masato S., Kentarou Matsumura, Taishi Yoshii, and Takahisa Miyatake. "Amplitude of circadian rhythms becomes weaken in the north, but there is no cline in the period of rhythm in a beetle." PLOS ONE 16, no. 1 (January 14, 2021): e0245115. http://dx.doi.org/10.1371/journal.pone.0245115.

Full text

Abstract:

Many species show rhythmicity in activity, from the timing of flowering in plants to that of foraging behavior in animals. The free-running periods and amplitude (sometimes called strength or power) of circadian rhythms are often used as indicators of biological clocks. Many reports have shown that these traits are highly geographically variable, and interestingly, they often show latitudinal or longitudinal clines. In many cases, the higher the latitude is, the longer the free-running circadian period (i.e., period of rhythm) in insects and plants. However, reports of positive correlations between latitude or longitude and circadian rhythm traits, including free-running periods, the power of the rhythm and locomotor activity, are limited to certain taxonomic groups. Therefore, we collected a cosmopolitan stored-product pest species, the red flour beetle Tribolium castaneum, in various parts of Japan and examined its rhythm traits, including the power and period of the rhythm, which were calculated from locomotor activity. The analysis revealed that the power was significantly lower for beetles collected in northern areas than southern areas in Japan. However, it is worth noting that the period of circadian rhythm did not show any clines; specifically, it did not vary among the sampling sites, despite the very large sample size (n = 1585). We discuss why these cline trends were observed in T. castaneum.

APA, Harvard, Vancouver, ISO, and other styles

20

Kaňuch, Peter, Berrit Kiehl, Anna Cassel-Lundhagen, Ane T. Laugen, Matthew Low, and Åsa Berggren. "Gene flow relates to evolutionary divergence among populations at the range margin." PeerJ 8 (October 22, 2020): e10036. http://dx.doi.org/10.7717/peerj.10036.

Full text

Abstract:

Background Morphological differentiation between populations resulting from local adaptations to environmental conditions is likely to be more pronounced in populations with increasing genetic isolation. In a previous study a positive clinal variation in body size was observed in isolated Roesel’s bush-cricket, Metrioptera roeselii, populations, but were absent from populations within a continuous distribution at the same latitudinal range. This observational study inferred that there was a phenotypic effect of gene flow on climate-induced selection in this species. Methods To disentangle genetic versus environmental drivers of population differences in morphology, we measured the size of four different body traits in wild-caught individuals from the two most distinct latitudinally-matched pairs of populations occurring at about 60°N latitude in northern Europe, characterised by either restricted or continuous gene flow, and corresponding individuals raised under laboratory conditions. Results Individuals that originated from the genetically isolated populations were always bigger (femur, pronotum and genital appendages) when compared to individuals from latitudinally-matched areas characterised by continuous gene flow between populations. The magnitude of this effect was similar for wild-caught and laboratory-reared individuals. We found that previously observed size cline variation in both male and female crickets was likely to be the result of local genetic adaptation rather than phenotypic plasticity. Conclusions This strongly suggests that restricted gene flow is of major importance for frequencies of alleles that participate in climate-induced selection acting to favour larger phenotypes in isolated populations towards colder latitudes.

APA, Harvard, Vancouver, ISO, and other styles

21

Tiosano, Dov, Laura Audi, Sharlee Climer, Weixiong Zhang, Alan R. Templeton, Monica Fernández-Cancio, Ruth Gershoni-Baruch, José Miguel Sánchez-Muro, Mohamed El Kholy, and Zèev Hochberg. "Latitudinal Clines of the Human Vitamin D Receptor and Skin Color Genes." G3: Genes|Genomes|Genetics 6, no. 5 (February 26, 2016): 1251–66. http://dx.doi.org/10.1534/g3.115.026773.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Jonsson, B., and J. H. L'Abee-Lund. "Latitudinal clines in life-history variables of anadromous brown trout in Europe." Journal of Fish Biology 43, sa (December 1993): 1–16. http://dx.doi.org/10.1111/j.1095-8649.1993.tb01175.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Nebel, Silke. "Latitudinal clines in sex ratio, bill, and wing length in Least Sandpipers." Journal of Field Ornithology 77, no. 1 (March 2006): 39–45. http://dx.doi.org/10.1111/j.1557-9263.2006.00021.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Santilli, Jessica, and Njal Rollinson. "Toward a general explanation for latitudinal clines in body size among chelonians." Biological Journal of the Linnean Society 124, no. 3 (May 19, 2018): 381–93. http://dx.doi.org/10.1093/biolinnean/bly054.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Kourti, A., and P. Hatzopoulos. "Latitudinal clines of allelic frequencies in Mediterranean populations of Ceratitis capitata (Wiedemann)." Genetics Selection Evolution 27, no. 3 (1995): 201. http://dx.doi.org/10.1186/1297-9686-27-3-201.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Aizen, Marcelo A., and Hilary Woodcock. "Latitudinal trends in acorn size in eastern North American species of Quercus." Canadian Journal of Botany 70, no. 6 (June 1, 1992): 1218–22. http://dx.doi.org/10.1139/b92-153.

Full text

Abstract:

Latitudinal variation in acorn size was examined in 32 species of the genus Quercus geographically restricted to eastern North America. Within-species comparisons showed the existence of a prevalent trend: individuals at high latitude produce, on the average, smaller acorns than individuals of the same species at low latitude. This observed trend, clines of decreasing acorn size with increasing latitude, could represent (i) the selected or plastic response to a shorter and (or) cooler growing season constraining the size of acorns that can mature on a tree, (ii) a consequence of past size-selective dispersal that accompanied postglacial range expansion, or (iii) a combination of these effects. The within-species trend contrasted with an observed among-species trend: species with large acorns have ranged that extend into higher latitudes than species with small acorns. Current evidence strongly suggests that small acorn size is maladaptive for successful seedling establishment at higher latitudes. Our results caution against inferring selective forces operating on seed size from among-species comparisons. Key words: acorn size, Quercus L., latitudinal clines, eastern North America.

APA, Harvard, Vancouver, ISO, and other styles

27

Nakamura, Sumio. "Male-biased latitudinal cline of Jungle Crows on Sakhalin Island." Acta Zoologica Cracoviensia 59, no. 2 (December 30, 2016): 177–89. http://dx.doi.org/10.3409/azc.59_2.177.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Hamilton, M. G., D. R. Williams, P. A. Tilyard, E. A. Pinkard, T. J. Wardlaw, M. Glen, R. E. Vaillancourt, and B. M. Potts. "A latitudinal cline in disease resistance of a host tree." Heredity 110, no. 4 (December 5, 2012): 372–79. http://dx.doi.org/10.1038/hdy.2012.106.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Mathot, Kimberley J., Barry D. Smith, and Robert W. Elner. "LATITUDINAL CLINES IN FOOD DISTRIBUTION CORRELATE WITH DIFFERENTIAL MIGRATION IN THE WESTERN SANDPIPER." Ecology 88, no. 3 (March 2007): 781–91. http://dx.doi.org/10.1890/06-1225.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Fleming, Ian A., and Mart R. Gross. "Latitudinal Clines: A Trade-Off between Egg Number and Size in Pacific Salmon." Ecology 71, no. 1 (February 1990): 1–11. http://dx.doi.org/10.2307/1940241.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Stenoien, H. K., C. B. Fenster, H. Kuittinen, and O. Savolainen. "Quantifying latitudinal clines to light responses in natural populations of Arabidopsis thaliana (Brassicaceae)." American Journal of Botany 89, no. 10 (October 1, 2002): 1604–8. http://dx.doi.org/10.3732/ajb.89.10.1604.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Blanckenhorn, W. U. "Bergmann and Converse Bergmann Latitudinal Clines in Arthropods: Two Ends of a Continuum?" Integrative and Comparative Biology 44, no. 6 (December 1, 2004): 413–24. http://dx.doi.org/10.1093/icb/44.6.413.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Nygren, Georg H., Anders Bergström, and Sören Nylin. "Latitudinal Body Size Clines in the ButterflyPolyommatus icarusare Shaped by Gene-Environment Interactions." Journal of Insect Science 8, no. 47 (June 2008): 1–13. http://dx.doi.org/10.1673/031.008.4701.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Munjal, AK, D. Karan, P. Gibert, B. Moreteau, R. Parkash, and JR David. "Thoracic trident pigmentation in Drosophila melanogaster: latitudinal and altitudinal clines in Indian populations." Genetics Selection Evolution 29, no. 5 (1997): 601. http://dx.doi.org/10.1186/1297-9686-29-5-601.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Coppin, Christopher W., Wendy A. Odgers, and John G. Oakeshott. "Latitudinal clines for nucleotide polymorphisms in the Esterase 6 gene of Drosophila melanogaster." Genetica 129, no. 3 (September 6, 2006): 259–71. http://dx.doi.org/10.1007/s10709-006-0006-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Yang, Yang, Mu Liu, Yuanfei Pan, Heyan Huang, Xiaoyun Pan, Alejandro Sosa, Yuping Hou, Zhengcai Zhu, and Bo Li. "Rapid evolution of latitudinal clines in growth and defence of an invasive weed." New Phytologist 230, no. 2 (February 11, 2021): 845–56. http://dx.doi.org/10.1111/nph.17193.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Berry, A., and M. Kreitman. "Molecular analysis of an allozyme cline: alcohol dehydrogenase in Drosophila melanogaster on the east coast of North America." Genetics 134, no. 3 (July 1, 1993): 869–93. http://dx.doi.org/10.1093/genetics/134.3.869.

Full text

Abstract:

Abstract Clines may either be selectively maintained or be the by-product of nonadaptive processes related to population structure and history. Drosophila melanogaster populations on the east coast of North America show a latitudinal cline in the frequencies of two common electrophoretically distinguishable alleles at the alcohol dehydrogenase locus (Adh), designated Adh-S and Adh-F. This cline may either be adaptive or an artifact of a possible recent dual founding of North American D. melanogaster populations in which frequencies of Adh alleles differed between founder populations. By means of a high resolution restriction-mapping technique, we studied the distribution of 113 haplotypes derived from 44 polymorphic DNA markers within the Adh region in 1533 individuals from 25 populations throughout the cline. We found significant clinal differentiation at the polymorphism determining the mobility-difference causing amino acid replacement between Adh-F and Adh-S alleles. Hitchhiking was limited, despite extensive linkage disequilibrium, and other sites did not vary clinally. Such a pattern of differentiation implies that selection is responsible for the cline. To investigate whether selection acts only on the Adh-F/S site, we performed a "selective equivalence" test under the assumption that all variability within the specified allelic class is selectively neutral. This revealed selective equivalence among Adh-S-bearing haplotypes, whose frequencies showed no differentiation throughout the cline, implying high levels of frequency-homogenizing gene flow. Geographical heterogeneity among Adh-F-bearing haplotypes implied the action of selection on one or more additional variants in linkage disequilibrium with Adh-F. In a further study of a subset of the data (n = 1076 from 18 populations), we found a combined insertion/deletion polymorphism, designated delta 1, located in the 5' adult intron and in linkage disequilibrium with Adh-F, to show more marked clinal variation than Adh-F/S. Although the unequivocal identification of the precise target(s) of selection requires further study, we suggest that clinal selection may be acting epistatically on the Adh-F/S and delta 1 polymorphisms.

APA, Harvard, Vancouver, ISO, and other styles

38

Paolucci, Silvia, Elena Dalla Benetta, Lucia Salis, David Doležel, Louis van de Zande, and Leo Beukeboom. "Latitudinal Variation in Circadian Rhythmicity in Nasonia vitripennis." Behavioral Sciences 9, no. 11 (November 15, 2019): 115. http://dx.doi.org/10.3390/bs9110115.

Full text

Abstract:

Many physiological processes of living organisms show circadian rhythms, governed by an endogenous clock. This clock has a genetic basis and is entrained by external cues, such as light and temperature. Other physiological processes exhibit seasonal rhythms, that are also responsive to light and temperature. We previously reported a natural latitudinal cline of photoperiodic diapause induction in the parasitic wasp Nasonia vitripennis in Europe and a correlated haplotype frequency for the circadian clock gene period (per). To evaluate if this correlation is reflected in circadian behaviour, we investigated the circadian locomotor activity of seven populations from the cline. We found that the proportion of rhythmic males was higher than females in constant darkness, and that mating decreased rhythmicity of both sexes. Only for virgin females, the free running period (τ) increased weakly with latitude. Wasps from the most southern locality had an overall shorter free running rhythm and earlier onset, peak, and offset of activity during the 24 h period, than wasps from the northernmost locality. We evaluated this variation in rhythmicity as a function of period haplotype frequencies in the populations and discussed its functional significance in the context of local adaptation.

APA, Harvard, Vancouver, ISO, and other styles

39

Ayala, Francisco J., Luis Serra, and Antonio Prevosti. "A grand experiment in evolution: the Drosophila subobscura colonization of the Americas." Genome 31, no. 1 (January 1, 1989): 246–55. http://dx.doi.org/10.1139/g89-042.

Full text

Abstract:

Drosophila subobscura is a Palearctic species that has been extensively studied by population and evolutionary geneticists for nearly half a century. In 1978, it appeared in Puerto Montt, Chile; within a few years it extended over much of Chile and into Argentina and became the most common drosophilid in many places. In 1982, it appeared in the American northwest; shortly thereafter it was found extensively distributed from southern British Columbia, through Washington and Oregon, into southern California, west of Sierra Nevada. In North America also it has become a common drosophilid in many places. The source of the colonizers has been sought with four lines of research: sequence arrangement of the polytene chromosomes, allozyme polymorphisms, mitochondrial DNA restriction patterns, and frequency of lethal alleles. The origin of the colonizers remains uncertain, although all evidence indicates that both the North American and the South American colonizers derive from the same Palearctic population. The overall configuration of the chromosomal and allozyme frequencies suggests a western Mediterranean origin, which is consistent with the mtDNA data. The presence of a particular chromosome arrangement, O5, suggests a northern European origin. Lethal allelism has opened up the possibility of discovering the precise origin of the colonizers: all O5 chromosomes in the Americas carry a particular recessive lethal gene. There is strong evidence that the number of founders was not very small and not very large, perhaps between 10 individuals and several score. The chromosomal polymorphisms of D. subobscura exhibit well-defined latitudinal clines in the Old World. In the few years since the colonization, clines in every chromosome have evolved in the Americas that have identical latitudinal polarity with those in the Old World. This would seem strong evidence that the polymorphisms and the clines are adaptive.Key words: chromosomal polymorphism, mitochondrial DNA evolution, allozyme polymorphism, lethal allelism, adaptation, geographic clines.

APA, Harvard, Vancouver, ISO, and other styles

40

ARTHUR, A. L., A. R. WEEKS, and C. M. SGRÒ. "Investigating latitudinal clines for life history and stress resistance traits inDrosophila simulansfrom eastern Australia." Journal of Evolutionary Biology 21, no. 6 (November 2008): 1470–79. http://dx.doi.org/10.1111/j.1420-9101.2008.01617.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Singh, B. N., and A. Das. "Further Evidence for Latitudinal Inversion Clines in Natural Populations of Drosophila melanogaster from India." Journal of Heredity 83, no. 3 (June 1992): 227–30. http://dx.doi.org/10.1093/oxfordjournals.jhered.a111199.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Saitou, Marie, and Takafumi Ishida. "Distributions of the GSTM1 and GSTT1 Null Genotypes Worldwide are Characterized by Latitudinal Clines." Asian Pacific Journal of Cancer Prevention 16, no. 1 (February 4, 2015): 355–61. http://dx.doi.org/10.7314/apjcp.2015.16.1.355.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Bauerfeind, Stephanie S., Martin A. Schäfer, David Berger, Wolf U. Blanckenhorn, and Charles W. Fox. "Replicated latitudinal clines in reproductive traits of European and North American yellow dung flies." Oikos 127, no. 11 (September 10, 2018): 1619–32. http://dx.doi.org/10.1111/oik.05421.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Kivelä, Sami M., Panu Välimäki, David Carrasco, Maarit I. Mäenpää, and Jari Oksanen. "Latitudinal insect body size clines revisited: a critical evaluation of the saw-tooth model." Journal of Animal Ecology 80, no. 6 (May 23, 2011): 1184–95. http://dx.doi.org/10.1111/j.1365-2656.2011.01864.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Burns, Mercedes, and Nobuo Tsurusaki. "Male Reproductive Morphology Across Latitudinal Clines and Under Long-Term Female Sex-Ratio Bias." Integrative and Comparative Biology 56, no. 4 (June 2, 2016): 715–27. http://dx.doi.org/10.1093/icb/icw017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Pittendrigh, Colin S., Walter T. Kyner, and Tsuguhiko Takamura. "The Amplitude of Circadian Oscillations: Temperature Dependence, Latitudinal Clines, and the Photoperiodic Time Measurement." Journal of Biological Rhythms 6, no. 4 (December 1991): 299–313. http://dx.doi.org/10.1177/074873049100600402.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Barnes, D. K. A., and R. J. Arnold. "Possible latitudinal clines in Antarctic intertidal and subtidal zone communities encrusting ephemeral hard substrata." Journal of Biogeography 26, no. 2 (March 1999): 207–13. http://dx.doi.org/10.1046/j.1365-2699.1999.00264.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Gardner, Janet L., Robert Heinsohn, and Leo Joseph. "Shifting latitudinal clines in avian body size correlate with global warming in Australian passerines." Proceedings of the Royal Society B: Biological Sciences 276, no. 1674 (August 12, 2009): 3845–52. http://dx.doi.org/10.1098/rspb.2009.1011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

de Jong, M. A., S. Collins, P. Beldade, P. M. Brakefield, and B. J. Zwaan. "Footprints of selection in wild populations ofBicyclus anynanaalong a latitudinal cline." Molecular Ecology 22, no. 2 (November 21, 2012): 341–53. http://dx.doi.org/10.1111/mec.12114.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Sanyal, Anushree, Jonathan Lenoir, Carmel O'Neill, Frederic Dubois, and Guillaume Decocq. "Intraspecific and interspecific adaptive latitudinal cline in Brassicaceae seed oil traits." American Journal of Botany 105, no. 1 (January 2018): 85–94. http://dx.doi.org/10.1002/ajb2.1014.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!