Bottlenecks, drift and differentiation: the fragmented population structure of the saltmarsh beetle Pogonus chalceus.

abstract：:Insect resistance in soybean has been an objective in numerous breeding programs, but efforts to develop high yielding cultivars with insect resistance have been unsuccessful. Three Japanese plant introductions, PIs 171451, 227687 and 229358, have been the primary sources of insect resistance alleles, but a combinatio...

journal_title：Genetica

authors： Boerma HR,Walker DR

更新日期：2005-02-01 00:00:00

abstract：:Most of our current understanding of comparative population structure has been come from studies of parasite-host systems, whereas the genetic comparison of gallnut-aphids and their host-plants remain poorly documented. Here, we examined the population genetic structure of the Chinese sumac aphid Schlechtendalia chine...

journal_title：Genetica

authors： Ren Z,Zhu B,Wang D,Ma E,Su D,Zhong Y

更新日期：2008-01-01 00:00:00

abstract：:Knowledge of population genetic structure and intrapopulation genetic variation is important for understanding population dynamics and evolutionary processes. Dendrobium nobile is an endangered traditional Chinese tonic medicine. In order to analyze the population differentiation and genetic diversity in D. nobile and...

journal_title：Genetica

authors： Yan W,Hou B,Xue Q,Geng L,Ding X

更新日期：2015-06-01 00:00:00

abstract：:Transposable elements are abundant in the genomes of higher organisms but are usually thought to affect cells only incidentally, by transposing in or near a gene and influencing its expression. Telomeres of Drosophila chromosomes are maintained by two non-LTR retrotransposons, HeT-A and TART. These are the first trans...

journal_title：Genetica

authors： Pardue ML,Danilevskaya ON,Traverse KL,Lowenhaupt K

更新日期：1997-01-01 00:00:00

abstract：:The level and pattern of genetic variation was analyzed in four species of the fern genus Adiantum L., A. hispidulum Sw., A. incisum Forrsk., A. raddianum C.Presl, and A. zollingeri Mett. ex Kuhn, originating from South India, using the ISSR fingerprinting method. The populations of Adiantum possessed a considerable l...

journal_title：Genetica

authors： Korpelainen H,de Britto J,Doublet J,Pravin S

更新日期：2005-11-01 00:00:00

abstract：:Cells are capable of sophisticated information processing. Cellular signal transduction networks serve to compute data from multiple inputs and make decisions about cellular behavior. Genomes are organized like integrated computer programs as systems of routines and subroutines, not as a collection of independent gene...

journal_title：Genetica

authors： Shapiro JA

更新日期：1999-01-01 00:00:00

abstract：:All extant birds share the same sex-chromosome system: ZZ males and ZW females with striking differences in the stages of sex-chromosome differentiation between the primitive palaeognathus ratites and the large majority of avian species grouped within neognaths. Evolutionarily close to ratites is the neotropical order...

journal_title：Genetica

authors： Pigozzi MI

更新日期：2011-06-01 00:00:00

abstract：:Epidemiologically, the Acquired Immune Deficiency Syndrome, AIDS, is transmitted and distributed in the USA and Europe almost entirely in well-defined subsets of populations engaging in, or subjected to, the effects of behaviours which carry high risks of genital and systemic infections. The persons predominantly affe...

journal_title：Genetica

authors： Stewart GT

更新日期：1995-01-01 00:00:00

abstract：:In addition to locating chromosomal positions of quantitative trait loci (QTL), estimating the sizes of identified QTL is also an important component in QTL mapping. The size of a QTL is usually measured by the proportion of the phenotypic variance contributed by the QTL. However, the genetic variance may be overestim...

journal_title：Genetica

authors： Luo L,Mao Y,Xu S

更新日期：2003-10-01 00:00:00

abstract：:Mutation is often said to be random. Although it must be true that mutation is ignorant about the adaptive needs of the organism and thus is random relative to them as a rule, mutation is not truly random in other respects. Nucleotide substitutions, deletions, insertions, inversions, duplications and other types of mu...

journal_title：Genetica

authors： Petrov DA

更新日期：2002-05-01 00:00:00

abstract：:Statistical assessment of candidate gene effects can be viewed as a problem of variable selection and model comparison. Given a certain number of genes to be considered, many possible models may fit to the data well, each including a specific set of gene effects and possibly their interactions. The question arises as ...

journal_title：Genetica

authors： Wu XL,Gianola D,Rosa GJ,Weigel KA

更新日期：2010-03-01 00:00:00

abstract：:The nematode Caenorhabditis elegans is a widely appreciated, powerful platform in which to study important biological mechanisms related to human health. More than 65% of human disease genes have homologues in the C. elegans genome, and essential aspects of mammalian cell biology, neurobiology and development are fait...

journal_title：Genetica

authors： Bazopoulou D,Tavernarakis N

更新日期：2009-09-01 00:00:00

abstract：:The progression of the prophase-I stage in Syrian hamster spermatocytes has been studied at different ages, from 12 to 41 days after birth. Two stages, leptotene and diplotene, were identified, which had not previously been described in the Syrian hamster using spreading techniques. The most interesting observations a...

journal_title：Genetica

authors： Guitart M,Ponsà M,Coll MD,Egozcue J

更新日期：1987-10-15 00:00:00

abstract：:RAPD technique provides useful information on the geographic origin and dispersal of the boll weevil Anthonomus grandis in South America. Nine populations from Argentina, Brazil, Paraguay, Mexico and USA were analyzed. Weevils were captured on native plants (Misiones province, Argentina) and on cotton cultures, except...

journal_title：Genetica

authors： Scataglini MA,Confalonieri VA,Lanteri AA

更新日期：2000-01-01 00:00:00

abstract：:Paratelmatobius and Scythrophrys are leptodactylid frogs endemic to the Brazilian Atlantic forest and their close phylogenetic relationship was recently inferred in an analysis that included Paratelmatobius sp. and S. sawayae. To investigate the interspecific relationships among Paratelmatobius and Scythrophrys specie...

journal_title：Genetica

authors： Lourenço LB,Bacci-Júnior M,Martins VG,Recco-Pimentel SM,Haddad CF

更新日期：2008-03-01 00:00:00

abstract：:Drosophila telomeres contain multiple copies of HeT-A and TART retrotransposons. These elements specifically transpose to chromosomal ends, compensating for loss of terminal nucleotides that occurs at each cycle of DNA replication. We have investigated the role of these sequences in the formation of telomere-telomere ...

journal_title：Genetica

authors： Cenci G,Siriaco G,Gatti M

更新日期：2003-03-01 00:00:00

abstract：:The Argonaute proteins are recently identified and evolutionarily conserved family with two subfamilies Ago and Piwi, which play important roles in small RNA pathways. Most species have eight Argonaute members in their genomes, ranging from 1 to 27. Here we report identification of six Argonaute genes in pig, four mem...

journal_title：Genetica

authors： Zhou X,Guo H,Chen K,Cheng H,Zhou R

更新日期：2010-07-01 00:00:00

abstract：:Drosophila subobscura males were trapped in Tunis, and mated to different lab strains. The offspring from 15% of these wild Tunisian males consisted of more than 90% females. Chromosome analysis showed that these males had carried the A2+3+5+7 which was described as 'sex ratio' chromosome, endemic in North Africa and ...

journal_title：Genetica

authors： Hauschteck-Jungen E

更新日期：1990-01-01 00:00:00

abstract：:An adaptive landscape concept outlined by G.G. Simpson constitutes the major conceptual bridge between the fields of micro- and macroevolutionary study. Despite some important theoretical extensions since 1944, this conceptual bridge has been ignored in many empirical studies. In this article, we review the status of ...

journal_title：Genetica

authors： Arnold SJ,Pfrender ME,Jones AG

更新日期：2001-01-01 00:00:00

abstract：:Taxa considered under low International Union for the Conservation of Nature categories of extinction risk often represent cases of concern to conservation biology. Their high relative abundance precludes management of the entire range due to limited economical resources. Therefore, they require a cost-effective manag...

journal_title：Genetica

authors： Segarra-Moragues JG,Catalán P

更新日期：2010-03-01 00:00:00

abstract：:The relationship between change in genomic GC content and protein evolution in bacteria was studied by simple correlational analysis (at the genus level) and by Felsenstein's (1985) independent contrast test. We first used the dnaA gene in bacteria as an example to show (1) that the amino acid composition of a protein...

journal_title：Genetica

authors： Gu X,Hewett-Emmett D,Li WH

更新日期：1998-01-01 00:00:00

abstract：:This paper deals with estimates of heritability and the effect of two different kinds of environment on the melanization of pupae in the butterfly Heliconius erato phyllis. The results for heritability showed greater differences when the offspring were regressed on male or female values for pupal colour. Pupal colour ...

journal_title：Genetica

authors： Ferreira AA,Garcia RN,de Araújo AM

更新日期：2006-01-01 00:00:00

abstract：:Understanding the evolutionary mechanisms that maintain genetic variation in natural populations is one of the fundamental goals of evolutionary biology. There is growing evidence that genotype-by-environment interaction (G x E) can maintain additive genetic variance (V (A)), but we lack information on the relative pe...

journal_title：Genetica

authors： Danielson-François AM,Zhou Y,Greenfield MD

更新日期：2009-05-01 00:00:00

abstract：:This study centers on marker chromosomes carrying expanded chromosomal regions which were observed in two independent derivatives of the AA12 murine fibrosarcoma line, the 10(-3) M MTX-res H2 and the 5 x 10(-7) M MTX-res E. Previous characterization of the marker chromosomes of MTX-res variants showed their common der...

journal_title：Genetica

authors： Riva P,Orlando S,Labella T,Larizza L

更新日期：1994-01-01 00:00:00

abstract：:The greater amberjack (Seriola dumerili) is a commercially and recreationally important marine fish species in the southeastern United States, where it has been historically managed as two non-mixing stocks (Gulf of Mexico and Atlantic). Mark-recapture studies and analysis of mitochondrial DNA have suggested the two s...

journal_title：Genetica

authors： Hargrove JS,Murie DJ,Parkyn DC,Saarinen EV,Austin JD

更新日期：2018-10-01 00:00:00

abstract：:The underlying relationship between functional variables and sequence evolutionary rates is often assessed by partial correlation analysis. However, this strategy is impeded by the difficulty of conducting meaningful statistical analysis using noisy biological data. A recent study suggested that the partial correlatio...

journal_title：Genetica

authors： Kim SH,Yi SV

更新日期：2007-10-01 00:00:00

abstract：:The chromosome morphology and meiotic pairing behavior in the pollen mother cells (PMCs) of Metasequoia glyptostroboides were investigated. The results showed that: (1) The chromosome number of the PMCs was 2n = 22. (2) The PMCs developed in the successive manner, and the nucleoids in the dynamic development were simi...

journal_title：Genetica

authors： He Z,Li J,Cai Q,Li X,Huang H

更新日期：2004-11-01 00:00:00

abstract：:Drosophila ananassae is a cosmopolitan and domestic species. It occupies a unique status among the Drosophila species due to certain peculiarities in its genetic behaviour. The most unusual feature of this species is spontaneous male recombination in appreciable frequency. The present review summarizes the work done o...

journal_title：Genetica

authors： Singh BN

更新日期：1996-05-01 00:00:00

abstract：:We have conducted a structure and functional analysis of the hobo transposable element of Drosophila melanogaster. A minimum of 141 bp of the left (L) end and 65 bp of the right (R) end of the hobo were shown to contain sequences sufficient for transposition. Both ends of hobo contain multiple copies of the motifs GGG...

journal_title：Genetica

authors： Kim YJ,Hice RH,O'Brochta DA,Atkinson PW

更新日期：2011-08-01 00:00:00

abstract：:An analysis of Arabidopsis thaliana heterochromatic regions revealed that genomic sequences immediately flanking the major 180 bp satellite are essentially made of middle repetitive sequences and that most of these sequences correspond to defective Athila retroelements. Using YAC and lambda clones, we evaluated the di...

journal_title：Genetica

authors： Pélissier T,Tutois S,Tourmente S,Deragon JM,Picard G

更新日期：1996-03-01 00:00:00