ISSN:
1573-5060
Keywords:
Inbreeding
;
Heterosis
;
Autotetraploid
;
Medicago sativa L.
;
Tetrasomic
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Abstract Inbreeding depression observed in Medicago sativa L. is greater in the early generations of self-fertilization than is expected for an autotetraploid based upon the coefficient of inbreeding (F). Forage yield often is reduced by 30 percent or more after one generation of selfing, while F is only one-sixth, α=0. A high frequency of loci containing 3 or 4 different alleles is postulated as a basis for this rapid loss of vigor. A formula is developed that permits computation of the proportions of loci with 1, 2, 3 and 4 different alleles, along with estimates of additive and non-additive values of genes. Forage yield data for backcross and sib-mated populations indicate that quantitative characters are inherited tetrasomically.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00024079
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