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GENETICS
Abstract Heterosis refers to the superior performance of a hybrid over its parents. It is the basis for hybrid breeding particularly for maize and rice. Genetically it is due to interactions between alleles of quantitative trait loci (QTL) (dominance and epistasis).
Zhao-Bang Zeng +4 more
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Abstract Heterosis refers to the superior performance of a hybrid over its parents. It is the basis for hybrid breeding particularly for maize and rice. Genetically it is due to interactions between alleles of quantitative trait loci (QTL) (dominance and epistasis).
Zhao-Bang Zeng +4 more
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Proceedings of the Royal Society of London. Series B - Biological Sciences, 1955
Abstract I shall deal only with the heterosis concerned with the genetic balance-mechanisms underlying morphism (balanced polymorphism as defined by E. B. Ford). All morphisms found in nature must involve a selective balance between the morphs (R. A.
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Abstract I shall deal only with the heterosis concerned with the genetic balance-mechanisms underlying morphism (balanced polymorphism as defined by E. B. Ford). All morphisms found in nature must involve a selective balance between the morphs (R. A.
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Molecular Genetics and Metabolism, 2000
Molecular heterosis occurs when subjects heterozygous for a specific genetic polymorphism show a significantly greater effect (positive heterosis) or lesser effect (negative heterosis) for a quantitative or dichotomous trait than subjects homozygous for either allele.
D E, Comings, J P, MacMurray
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Molecular heterosis occurs when subjects heterozygous for a specific genetic polymorphism show a significantly greater effect (positive heterosis) or lesser effect (negative heterosis) for a quantitative or dichotomous trait than subjects homozygous for either allele.
D E, Comings, J P, MacMurray
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Heterosis: Complementation by Mitochondria
Science, 1966Many (but not all) hybrids between two genetic pure lines show heterosis; that is the hybrids grow more rapidly or larger than the parental pure lines. The mechanism is not known. Two corn crosses were studied. In one hybrid known to exhibit heterosis, the mitochondria and an artificial 1:1 mixture of parent mitochondria showed heterosis with respect ...
R G, McDaniel, I V, Sarkissian
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Heterosis and variability in the mouse
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1955Abstract The relation between heterosis and variabihty discussed by previous speakers i well illustrated by an example in the mouse where the structure of the second thoracic vertebra (vertebra prominens) is very variable; it may have a broad spatulat spinous process (+ + +), a round rod-shaped one (+ +), a mere spike (+), or then may
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A Molecular Basis for Heterosis
Science, 1969Alcohol dehydrogenase allodimers composed of an unstable active subunit and a stable but inactive subunit are both active and stable. The implication of this finding for the problem of heterosis is discussed.
D, Schwartz, W J, Laughner
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Heterosis in chromosome behaviour
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1955Abstract Most examples and measurements of heterosis are concerned with the more familiar features of the phenotype, with such characters as size and growth rate of the body or its outer parts. This account is concerned with less accessible, though not less important, parts of the phenotype, and describes heterosis as it is shown in ...
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The genetical basis of heterosis
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1955Abstract Appreciation of the practical value of hybrid vigour is as old as the mule, but its scientific investigation began only relatively recently. Vigour transcending that of the parents was observed in hybrids by a number of the early hybridizers and, indeed, Mendel himself records it as an incidental observation on his peas; but ...
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