Results 51 to 60 of about 8,997 (265)
Hybrid gene misregulation in multiple developing tissues within a recent adaptive radiation of Cyprinodon pupfishes. [PDF]
, 2019 Genetic incompatibilities constitute the final stages of reproductive isolation and speciation, but little is known about incompatibilities that occur within recent adaptive radiations among closely related diverging populations.
Martin, Christopher, McGirr, Joseph
core +2 more sources
Scientific Reports, 2021 The successful implementation of heterosis in rice has significantly enhanced rice productivity, but the genetic basis of heterosis in rice remains unclear.
Wenqing Yang +7 more
doaj +1 more source
MARGINAL OVERDOMINANCE IN DROSOPHILA [PDF]
Genetics, 1975 ABSTRACT A reanalysis of Drosophila viability data was undertaken to determine the role of genotype-environment interactions in the maintenance of polymorphism. Between-replicate variances of viabilities in chromosomal homozygotes and heterozygotes with the same mean fitnesses were compared, with the expectation that if the heterozygote ...
openaire +2 more sources
Clines Maintained by Overdominant Selection in Hybrid Zones [PDF]
Hereditas, 2004 Hybrid zone models often consider environment-independent selection to operate against all hybrids. However, empirical studies suggest that hybrids may be as fit or fitter than the hybridizing parental taxa in some environments. In this study we develop a novel mathematical model to explore the effects of one form of hybrid superiority on the genetic ...
Goodisman, Michael A.D. +1 more
openaire +3 more sources
Овощи России, 2022 . Heterotic selection is now widely used in crop production. The superiority of heterotic hybrids over varieties in many respects has long been known. However, the widespread use of heterosis in melon growing is hampered by the high cost of seed material,
E. A. Varivoda +2 more
doaj +1 more source
Genotypic selection in Daphnia populations consisting of inbred sibships [PDF]
, 2007 The genetic basis of fitness reduction associated with inbreeding is still poorly understood. Here we use associations between allozyme genotypes and fitness to investigate the genetic basis of inbreeding depression in experimental outdoor populations of
Haag, Christoph, Hebert, Dieter
core +1 more source
Overdominant mutations restrict adaptive loss of heterozygosity at linked loci [PDF]
Genome Biology and Evolution, 2021 ABSTRACTLoss of heterozygosity is a common mode of adaptation in asexual diploid populations. Because mitotic recombination frequently extends the full length of a chromosome arm, the selective benefit of loss of heterozygosity may be constrained by linked heterozygous mutations.
Kaitlin J Fisher +2 more
openaire +3 more sources
BMC Medical Genetics, 2003 Background Doherty and Zinkernagel, who discovered that antigen presentation is restricted by the major histocompatibility complex (MHC, called HLA in humans), hypothesized that individuals heterozygous at particular MHC loci might be more resistant to ...
Bergstrom Carl T +2 more
doaj +1 more source
Tomato yield heterosis is triggered by a dosage sensitivity of the florigen pathway that fine-tunes shoot architecture. [PDF]
PLoS Genetics, 2013 The superiority of hybrids has long been exploited in agriculture, and although many models explaining "heterosis" have been put forth, direct empirical support is limited.
Ke Jiang +4 more
doaj +1 more source
Genome-Wide Linkage Analysis to Identify Chromosomal Regions Affecting Phenotypic Traits in the Chicken. III. Skeletal Integrity [PDF]
, 2007 Two unique chicken F2 populations generated from a broiler breeder male line and 2 genetically distinct inbred (\u3e99%) chicken lines (Leghorn and Fayoumi) were used for whole genome QTL analysis.
Ashwell, C. M. +6 more
core +3 more sources