: Principles of Genetics, No. 30: Inbreeding and Heterosis .
نویسندگان
چکیده
منابع مشابه
A next generation of studies: Heterosis and inbreeding depression
Heterosis or hybrid vigor is a phenomenon in which the F1 progeny is superior in characteristics than its inbred parents. Inbreeding depression refers to the reduced vigor in the offspring from matings involving related parents. The world’s most important grain crop, Zea mays exhibits significant heterosis and inbreeding depression, and despite billions of dollars of sales and investments in hy...
متن کاملMechanisms of Inbreeding Depression and Heterosis for Profitable Dairying
Genes in diploid organisms operate singly, in pairs, and in conjunction with genes at other locations throughout the nuclear DNA. Inbreeding depression and heterosis arise from the effects of gene combinations, that is, the effects of pairs of genes. Gene pairs are unique characteristics of individuals that are broken down and reformed each generation. This basic biological fact, introduced to ...
متن کاملThe effect of inbreeding rate on fitness, inbreeding depression and heterosis over a range of inbreeding coefficients
Understanding the effects of inbreeding and genetic drift within populations and hybridization between genetically differentiated populations is important for many basic and applied questions in ecology and evolutionary biology. The magnitudes and even the directions of these effects can be influenced by various factors, especially by the current and historical population size (i.e. inbreeding ...
متن کاملHeterosis and Inbreeding Depression in Two Soybean Single Crosses
Heterosis is considered to be of little importance in soybean (Glycine max L. Merr.) because the crop is produced as “pure-line” cultivars or blends of inbred lines. The F1 generations Holladay/ Hutcheson (Cross 1) and Brim/Boggs (Cross 2) were generated by hand pollinations. Inbred generations were generated by bulk selfing. The F1, F2, F3, F4, and F5 generations were yield-tested in replicate...
متن کاملInfluence of genetics and inbreeding on disease
doi:10.1136/inp.e2382 Provenance: Commissioned and peer-reviewed John Woolliams graduated from the University of Cambridge in 1977, with an MA in Mathematics and a Diploma in Mathematical Statistics. He then worked for the precursor institutions of The Roslin Institute, University of Edinburgh. He is currently professor of mathematical genetics at the Royal (Dick) School of Veterinary Studies a...
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ژورنال
عنوان ژورنال: American Anthropologist
سال: 1978
ISSN: 0002-7294,1548-1433
DOI: 10.1525/aa.1978.80.2.02a01270