It is also called luxuriance.
Welcome to BiologyDiscussion! 2020 Jul 7;10(7):2497-2506. doi: 10.1534/g3.120.401196.Shahzad K, Zhang X, Guo L, Qi T, Bao L, Zhang M, Zhang B, Wang H, Tang H, Qiao X, Feng J, Wu J, Xing C.BMC Plant Biol. Get kids back-to-school ready with Expedition: Learn! Epub 2014 Jul 16.Biochim Biophys Acta.

While discussing the work on maize during a lecture at Gottingen (West Germany), Dr. G.H. An early view was that the combination of different alleles in an organism resulted in a superior state for growth and vigor compared with the presence of identical alleles (3). 2013 May;16(2):221-7. doi: 10.1016/j.pbi.2013.03.009. Answer Now and help others.
Plant and animal breeders exploit heterosis by mating two different pure-bred lines that have certain desirable traits.

Darwin (1876) also reported that inbreeding in plants results in deterioration of vigour and the crossing in hybrid vigour. SOM, P. HAZRA, in Genetic Improvement of Vegetable Crops, 1993.

It appears that there is not a single, simple explanation for heterosis. Epub 2013 Apr 13.BMC Evol Biol. Earliness is highly desirable in vegetables In many cases, hybrids are earlier in flowering and maturity than the parents, e.g. He termed it as Michelis, Shull, Lewis, and others suggested that hybrid vigour is the interaction of cytoplasmic and nuclear systems. We do not retain these email addresses.The Genetics Society of America (GSA), founded in 1931, is the professional membership organization for scientific researchers and educators in the field of genetics. Genetics January 1, 1978 vol. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. Heterosis Definition: This increased productivity or superiority over the parents is known as heterosis or hybrid vigor.. Or. 2. Poweri (1944, 45) reported that the crossing, however, may result in either weak or vigorous hybrids as compared to parental inbreeds. Examples of how to use “heterosis” in a sentence from the Cambridge Dictionary Labs Because hybrid vigor is the manifest property of heterozygotes, at least 2 explanations are popular.

(ii) Cross between red Sindhi breed of Indian Cattle and Jersey breed of America contams 30% more butter fat in milk. …other consideration in crossbreeding is heterosis, or hybrid vigour, which is displayed when the offspring performance exceeds the average performance of the parent breeds.

R. C. Lewontin, L. R. Ginzburg and S. D. Tuljapurkar. doi: 10.1146/annurev-arplant-042110-103827. Various models have been posited to explain heterosis, including dominance, overdominance, and pseudo-overdominance. (i) Mule is a hybrid from a cross between Jack (Equus hemicus) and Mare (Earns equus) which has been known since ancient times for its well-known qualities of strength and stubbornness. 2015 Feb;56(1):1-13. doi: 10.1007/s13353-014-0231-z. By signing up for this email, you are agreeing to news, offers, and information from Encyclopaedia Britannica.Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. The explanation for heterosis phenomenon is based on ideas: (i) every trait of an organism depends on many genes. The genetic basis of heterosis has been debated for nearly a hundred years without an emerging consensus (3–5) (Fig. Earliness in many crops is agriculturally desirable so, it is argued that F, shows faster development in which vegetative phase is replaced by the reproductive phase more quickly than in the parents. Our members work to advance knowledge in the basic mechanisms of inheritance, from the molecular to the population level.Copyright © 2020 by the Genetics Society of AmericaEnter multiple addresses on separate lines or separate them with commas.This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.Spontaneous Polyploids and Antimutators Compete During the Evolution of Site-Specific Recombination with Inverted Target Sites: A Cautionary Tale of Dicentric and Acentric ChromosomesSystematic Humanization of the Yeast Cytoskeleton Discerns Functionally Replaceable from Divergent Human Genes

This website includes study notes, research papers, essays, articles and other allied information submitted by visitors like YOU. Such inbreeds would be as vigorous as the FHe suggested that there may be a linkage between some favourable dominant genes and some un-favourable recessive genes and as a result it is not possible to obtain true breeding homozygous individual for all dominant genes in FThis hypothesis was given by Shull (1903) and East (1908) independently. The model situation is:…

ShuII (1914) proposed the term heterosis (Gr. Heterosis refers to the phenomenon that progeny of diverse varieties of a species or crosses between species exhibit greater biomass, speed of development, and fertility than both parents. Cytoplasm is a transparent fluid rich in RNA and mitochondria, which is usually transmitted through the female parent to the offspring.

M.G.

Heterosis generally results from the action of multiple loci, and different loci affect heterosis for different traits and in different hybrids. Heterosis Breeding. doi: 10.1146/annurev-arplant-042110-103827. heteros different and osis = condition). eCollection 2020 Jun.Yu K, Wang H, Liu X, Xu C, Li Z, Xu X, Liu J, Wang Z, Xu Y.Front Plant Sci.

An introgression line population of Lycopersicon pennelli in the cultivated tomato enables the identification and fine mapping of yield-associated QTL. It is also called luxuriance. Heterosis, also called hybrid vigour, the increase in such characteristics as size, growth rate, fertility, and yield of a hybrid organism over those of its parents. (iii) Increased pork yield in pigs, more egg laying hens, silk production in silk worms etc. …life table comparisons indicate that hybrid vigour (heterosis) is an increase of age-independent vigour and not a decrease in the rate of aging.… Crossing of the two parental forms brings in an accidental, excessive and un-adaptable expression of temporary vigour and vegetative overgrowth.

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