منابع مشابه
Dominance, epistasis, heritabilities and expected genetic gains
Although epistasis is common in gene systems that determine quantitative traits, it is usually not possible to estimate the epistatic components of genotypic variance because experiments in breeding programs include only one type of progeny. As the study of this phenomenon is complex, there is a lack of theoretical knowledge on the contribution of the epistatic variances when predicting gains f...
متن کاملDominance, epistasis and the genetics of postzygotic isolation.
The sterility and inviability of species hybrids can be explained by between-locus "Dobzhansky-Muller" incompatibilities: alleles that are fit on their "normal" genetic backgrounds sometimes lower fitness when brought together in hybrids. We present a model of two-locus incompatibilities that distinguishes among three types of hybrid interactions: those between heterozygous loci (H(0)), those b...
متن کاملteosinte branched1 and the origin of maize: evidence for epistasis and the evolution of dominance.
Two quantitative trait loci (QTL) controlling differences in plant and inflorescence architecture between maize and its progenitor (teosinte) were analyzed. Complementation tests indicate that one of these, which is on chromosome arm 1L, is the locus for the maize mutant teosinte branched1 (tb1). This QTL has effects on inflorescence sex and the number and length of internodes in the lateral br...
متن کاملPartial Dominance , Pleiotropism , and Epistasis in the Inheritance of the High - Oleate Trait in Peanut
Earlier reports of the high-oleate (low-linoleate) trait in peanut (Arachis hypogaea L.) indicated that it was controlled by completely dominant gene action. However, linoleate content intermediate to that in lowand normal-linoleate seeds was found among progeny when the trait was backcrossed into five virginia-type cultivars, suggesting partial dominance of the gene controlling the trait. Alth...
متن کاملGene regulatory networks generating the phenomena of additivity, dominance and epistasis.
We show how the phenomena of genetic dominance, overdominance, additivity, and epistasis are generic features of simple diploid gene regulatory networks. These regulatory network models are together sufficiently complex to catch most of the suggested molecular mechanisms responsible for generating dominant mutations. These include reduced gene dosage, expression or protein activity (haploinsuff...
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ژورنال
عنوان ژورنال: Poultry Science
سال: 1958
ISSN: 0032-5791
DOI: 10.3382/ps.0371173