Initial steps in XY chromosome differentiation in Hoplias malabaricus and the origin of an X(1)X(2)Y sex chromosome system in this fish group.

abstract：:The fixation of major chromosomal rearrangements with a heterozygote disadvantage is modelled as a simple example of Wright's shifting balance process of evolution in a strongly subdivided population. Chromosomal mutations with an inferior heterozygote become fixed in a local population (or deme) by random genetic dri...

journal_title：Heredity

authors： Lande R

更新日期：1985-06-01 00:00:00

abstract：:Knowledge of the degree of temporal stability of population genetic structure and composition is important for understanding microevolutionary processes and addressing issues of human impact of natural populations. We know little about how representative single samples in time are to reflect population genetic constit...

journal_title：Heredity

authors： Charlier J,Laikre L,Ryman N

更新日期：2012-10-01 00:00:00

abstract：:Understanding the evolution of female multiple mating (polyandry) is crucial for understanding sexual selection and sexual conflict. Despite this interest, little is known about its genetic basis or whether genetics influences the evolutionary origin or maintenance of polyandry. Here, we explore the quantitative genet...

journal_title：Heredity

authors： Shuker DM,Phillimore AJ,Burton-Chellew MN,Hodge SE,West SA

更新日期：2007-02-01 00:00:00

abstract：:Knowledge of the mechanism underlying the expression of melanin-based sex-traits may help us to understand their signalling function. Potential sources of inter-individual variation are the total amount of melanins produced but also how biochemical precursors are allocated into the eumelanin and phaeomelanin pigments ...

journal_title：Heredity

authors： Roulin A,Dijkstra C

更新日期：2003-05-01 00:00:00

abstract：:The parapatric distribution of genetically divergent lineages in hybrid zones can be maintained by ecological differences (dispersal-independent 'ecotonal' hybrid zones), by frequency- and density-dependent interference when they intermingle and mate (dispersal-dependent 'tension' hybrid zones), or by both processes a...

journal_title：Heredity

authors： Dorken ME,Pannell JR

更新日期：2007-07-01 00:00:00

abstract：:A temporal analysis of a hybrid zone between chromosomal races of Mus musculus domesticus was performed to evaluate its dynamics over a 20-year period. The transect chosen was one previously analysed by Spirito et al. (1980) across the hycbrid zone between the chromosomal race CD 2n=22 (central Italy) and the surround...

journal_title：Heredity

authors： Castiglia R,Capanna E

更新日期：1999-09-01 00:00:00

abstract：:Small populations of our study species Ranunculus reptans have reduced fitness because of inbreeding, genetic load, and reduced mate availability; that is, they suffer from a three-fold genetic Allee effect. Here, we investigate how the effect of interpopulation outbreeding on offspring fitness depends on population s...

journal_title：Heredity

authors： Willi Y,Fischer M

更新日期：2005-12-01 00:00:00

abstract：:The expression of phenotypic plasticity may differ among life stages of the same organism. Age-dependent plasticity can be important for adaptation to heterogeneous environments, but this has only recently been recognized. Whether age-dependent plasticity is a common outcome of local adaptation and whether populations...

journal_title：Heredity

authors： Nilsson-Örtman V,Rogell B,Stoks R,Johansson F

更新日期：2015-10-01 00:00:00

abstract：:Segregation distortion is the phenomenon whereby the observed genotypic frequencies of a locus fall outside the expected Mendelian segregation ratio, and it is increasingly recognised as a potentially powerful evolutionary force. The main reason for segregation distortion is a difference in the viability of gametes an...

journal_title：Heredity

authors： Tang ZX,Wang XF,Zhang MZ,Zhang YH,Deng DX,Xu CW

更新日期：2013-04-01 00:00:00

abstract：:Quantitative trait locus (QTL) analysis detects regions of a genome that are linked to a complex trait. Once a QTL is detected, the region is narrowed by positional cloning in the hope of determining the underlying candidate gene-methods used include creating congenic strains, comparative genomics and gene expression ...

journal_title：Heredity

authors： Cox A,Sheehan SM,Klöting I,Paigen B,Korstanje R

更新日期：2010-11-01 00:00:00

abstract：:Cycloheximide-resistant mutants of Schizosaccharomyces pombe were isolated either as spontaneous mutants or after mutagenic treatment with nitrous acid, UV and N-methyl-N'-nitro-N-nitrosoguanidine (MNNG). Twenty-three spontaneous mutants and 64 induced mutants were analysed genetically. Crosses revealed that at least ...

journal_title：Heredity

authors： Ibrahim MA,Coddington A

更新日期：1976-10-01 00:00:00

abstract：:Red deer representing the four different European subspecies Cervus elaphus atlanticus, C. e. elaphus, C. e. germanicus, and C. e. scoticus were examined for allozyme variability at 35 enzyme loci. The proportion of polymorphic loci within populations (P) ranged from 0 to 13.8 per cent and the average heterozygosity (...

journal_title：Heredity

authors： Gyllenstein U,Ryman N,Reuterwall C,Dratch P

更新日期：1983-12-01 00:00:00

abstract：:The polyploid Salix alba-Salix fragilis hybrid complex is rather difficult to study when using only morphological characters. Most of the features have a low diagnostic value for unambiguously identifying the hybrids, introgression patterns and population structures, though morphological traits have proved to be usefu...

journal_title：Heredity

authors： Triest L,De Greef B,De Bondt R,Van Slycken J

更新日期：2000-05-01 00:00:00

abstract：:Mate choice behaviors are among the most important reproductive isolating barriers in many animals. Little is known about the genetic basis of reproductively isolating behaviors, but examples to date provide evidence that they can have a simple genetic basis. However, it is unclear if these results indicate that indiv...

journal_title：Heredity

authors： Shahandeh MP,Turner TL

更新日期：2020-06-01 00:00:00

abstract：:The sibling species Anopheles atroparvus and Anopheles labranchiae are cytogenetically almost indistinguishable. The chromosome complement (2n = 6) consists of two pairs of autosomes and two heteromorphic sex chromosomes with largely homologous heterochromatic long arms. Treatment of chromosome preparations with the r...

journal_title：Heredity

authors： Marchi A,Mezzanotte R

更新日期：1990-08-01 00:00:00

abstract：:Heritabilities of nectar production in the wild species Echium vulgare were estimated as realised heritability under controlled and field conditions. The nectar production of offspring from high- and low-nectar-producing parents was significantly different in both controlled and field conditions, indicating that necta...

journal_title：Heredity

authors： Leiss KA,Vrieling K,Klinkhamer PG

更新日期：2004-05-01 00:00:00

abstract：:Genomic rearrangements can result in losses, amplifications, translocations and inversions of DNA fragments thereby modifying genome architecture, and potentially having clinical consequences. Many genomic disorders caused by structural variation have initially been uncovered by early cytogenetic methods. The last dec...

journal_title：Heredity

authors： Le Scouarnec S,Gribble SM

更新日期：2012-01-01 00:00:00

abstract：:Farmed fish are typically genetically different from wild conspecifics. Escapees from fish farms may contribute one-way gene flow from farm to wild gene pools, which can depress population productivity, dilute local adaptations and disrupt coadapted gene complexes. Here, we reanalyse data from two experiments (McGinni...

journal_title：Heredity

authors： Reed TE,Prodöhl P,Hynes R,Cross T,Ferguson A,McGinnity P

更新日期：2015-08-01 00:00:00

abstract：:Genetic diversity and differentiation were studied in Corrigiola litoralis L., an annual plant species growing on seasonally flooded river banks. Plant species that are restricted to river systems may consist of highly isolated populations. For this species, pronounced genetic differentiation among rivers was expected...

journal_title：Heredity

authors： Durka W

更新日期：1999-10-01 00:00:00

abstract：:The field of ecological genomics seeks to understand the genetic mechanisms underlying responses of organisms to their natural environments. This is being achieved through the application of functional genomic approaches to identify and characterize genes with ecological and evolutionary relevance. By its very nature,...

journal_title：Heredity

authors： Ungerer MC,Johnson LC,Herman MA

更新日期：2008-02-01 00:00:00

abstract：:The central aim of evolutionary biology is to understand patterns of genetic variation between species and within populations. To quantify the genetic variation underlying intraspecific differences, estimating quantitative genetic parameters of traits is essential. In Pterygota, wing morphology is an important trait a...

journal_title：Heredity

authors： Xia S,Pannebakker BA,Groenen MAM,Zwaan BJ,Bijma P

更新日期：2020-08-01 00:00:00

abstract：:A high-resolution transcript linkage map of barley was created using a single doubled haploid (DH) mapping population, only 3'-end expressed sequence tags (ESTs) and only PCR-based assays. Cultivar 'Haruna Nijo' and an ancestral wild-form accession 'H602' were used as EST donors and crossing parents of the mapping pop...

journal_title：Heredity

authors： Sato K,Nankaku N,Takeda K

更新日期：2009-08-01 00:00:00

abstract：:Sex ratio theory attempts to explain variation at all levels (species, population, individual, brood) in the proportion of offspring that are male (the sex ratio). In many cases this work has been extremely successful, providing qualitative and even quantitative explanations of sex ratio variation. However, this is no...

journal_title：Heredity

authors： West SA,Reece SE,Sheldon BC

更新日期：2002-02-01 00:00:00

abstract：:The ecological theory of adaptive radiation predicts that the evolution of phenotypic diversity within species is generated by divergent natural selection arising from different environments and competition between species. Genetic connectivity among populations is likely also to have an important role in both the ori...

journal_title：Heredity

authors： Kapralova KH,Morrissey MB,Kristjánsson BK,Olafsdóttir GÁ,Snorrason SS,Ferguson MM

更新日期：2011-03-01 00:00:00

abstract：:Fisher's model for the evolution of dominance indicates that the accumulation of dominance modifiers will be accelerated by (1) an increased frequency of the mutant heterozygote, (2) increased selection for the phenotype of the normal homozygote. The model has been criticised by Haldane on the grounds that point (1) i...

journal_title：Heredity

authors： Manning JT

更新日期：1977-02-01 00:00:00

abstract：:Habitat fragmentation is a major cause of biodiversity loss, responsible for an alteration of intraspecific patterns of neutral genetic diversity and structure. Although neutral genetic variation can be informative for demographic inferences, it may be a poor predictor of adaptive genetic diversity and thus of the con...

journal_title：Heredity

authors： Perrin A,Khimoun A,Faivre B,Ollivier A,de Pracontal N,Théron F,Loubon M,Leblond G,Duron O,Garnier S

更新日期：2021-01-01 00:00:00

abstract：:It has been proposed that the distribution patterns and coalescence ages found in Europeans for mitochondrial DNA (mtDNA) haplogroups V, H1 and H3 are the result of a post-glacial expansion from a Franco-Cantabrian refuge that recolonized central and northern areas. In contrast, in this refined mtDNA study of the Cant...

journal_title：Heredity

authors： García O,Fregel R,Larruga JM,Álvarez V,Yurrebaso I,Cabrera VM,González AM

更新日期：2011-01-01 00:00:00

abstract：:Geographical range is considered a good predictor of the levels of isozyme variation in plants. Widespread species, often consisting of historically larger and more continuous populations, maintain higher polymorphism and are less affected by drift, which tends to erode genetic variation in more geographically restric...

journal_title：Heredity

authors： Premoli AC,Souto CP,Allnutt TR,Newton AC

更新日期：2001-09-01 00:00:00

abstract：:Deleterious mutations accumulating on non-recombining Y chromosomes can drive XY to XY turnovers, as they allow to replace the old mutation-loaded Y by a new mutation-free one. The same process is thought to prevent XY to ZW turnovers, because the latter requires fixation of the ancestral Y, assuming dominance of the ...

journal_title：Heredity

authors： Saunders PA,Neuenschwander S,Perrin N

更新日期：2019-09-01 00:00:00

abstract：:Gene flow was investigated in Anopheles gambiae from eight localities that span the ecological zones of Nigeria (arid savanna zones in the north gradually turn into humid forest zones in the south). Genetic differentiation was measured over 10 microsatellite loci and, to determine any effects of selection, five loci w...

journal_title：Heredity

authors： Onyabe DY,Conn JE

更新日期：2001-12-01 00:00:00