WebClines are gradations in biological features over geographic space. They refer to continuous degrees of difference in either phenotype or genotype across or within human populations. A given cline consists of the gradient in frequency of a single trait over space. This graded change is often associated with a gradually changing environmental ... In I. senegalensis, a smooth cline in female morph frequency was observed with latitude in Japan. The frequency of andromorphs in each local population ranged from 0 % (South) to 80 % (North), and it was 50 % at a northern latitude of 36°. The cline width was wider than 2000 km (23–37°N) (Takahashi et al. 2011, … See more The geographic pattern of the reproductive potential of each morph was estimated based on body size that correlates strongly with the number of ovarioles, assuming there is no … See more Molecular analyses based on genetic markers can be used to examine the presence of gene flow, historical events, and selections. The … See more To detect the balancing selection that acts on female morphs of I. senegalensis, the daily reproductive success of each morph was estimated in several natural populations with … See more
Population Genetics - OpenEd CUNY
WebDec 22, 2024 · a Geographic cline in average Q North frequency along a 2072 km north-south sampling transect connecting Collier County, Florida and Hamilton County, New York. Crosses represent sampled counties. WebJan 14, 2000 · The introduction and rapid spread of Drosophila subobscura in the New World two decades ago provide an opportunity to determine the predictability and rate of … births by hospital
A narrow window for geographic cline analysis using …
WebAug 11, 2024 · Estimation of the geographic location of the cline center and the width of the cline by cline modeling for the selected SNPs (blue; AFD ≥ 0.97 in the L1-S7 … WebFeb 20, 2024 · All marker types were used in a geographic cline analysis to measure temporal changes in the location of the hybrid zone. Whether species boundaries break down or build up as a consequence of hybrid zone movement will have implications for conservation efforts and the management of natural resources, given that changes in … In biology, a cline (from the Greek κλίνειν klinein, meaning "to lean") is a measurable gradient in a single characteristic (or biological trait) of a species across its geographical range. First coined by Julian Huxley in 1938, the "character" of the cline referred to is usually genetic (e.g. allele frequency, blood type), or phenotypic (e.g. body size, skin pigmentation). Clines can show smooth, continuous gradation in a character, or they may show more abrupt changes in the trait from on… births by local authority