an increase in the performance of hybrids over that of purebreds, most noticeably in traits such as fertility and survivability.
Performance of offspring that is greater than the average of the performance of the parents. Usually the amount of superiority of the crossbred over the average of the parental breeds. Also referred to as hybrid vigor.
The superiority of an outbred individual relative to the average performance of the parent populations included in the cross.
Sometimes called "hybrid vigor." It is a phenomenon with first generation crosses. Unfortunately, because hybrids do not reproduce true to form, the heterosis does not last. Seeds must be bought each year to maintain the same standard.
Refers to the phenomenon in which the Fl hybrid obtained by the crossing of two genetically dissimilar parents shows superiority over the best standard check prevailing at that time in one or a combination of characters.
(syn. hybrid vigor) increased vigor of hybrid offspring when compared to either parent
The production of an exceptionally vigorous and/or productive hybrid progeny from a directed cross between two pure-breeding plant lines.
The degree by which a crossbred animal exceeds the average of the parents of a particular trait.
increased vigour of growth or fertility (or other characteristics influencing survival) in an individual resulting from a cross of two genetically different lines.
The increased fitness of an organism that results from breeding between two different lines or populations. Heterosis is produced by increased heterozygosity.
Hybrid vigor-increased vitality due to crossbreeding.
Hybrid Vigor. Superiority of a crossbred individual relative to the average performance of purebred parents included in the cross.
a situation where crossing two inbred lines yields progeny that are more healthy/vigorous than their parents. (More commonly used in plant breeding.)
(Gr. heteros, different + osis, suffix for "a state of") See hybrid vigour.
Amount by which traits measured on the crossbred offspring exceed the average of traits measured on the parents.
Amount by which measured traits of the crossbreds exceed the average of the two or more purebreds that are mated to produce the crossbreds.
the increased vigour, growth, size or yield of a hybrid progeny over the parents that results from crossing genetically unlike parents. (Also called hybrid vigour)
Hybrid vigour resulting from cross-fertilisation.
Heterosis is increased strength of different characteristics in hybrids; the possibility to obtain a "better" individual by combining the virtues of its parents.