Publication Date
1985
Location
Kyoto Japan
Description
Heterosis effect in advanced generations of synthetic varieties of alfalfa, Medicago sativa L., using component lines bred for one breeding objective and those using unrelated component lines for different objectives was investigated. Heterosis effect in yield in advanced generations of synthetic variety composed of unrelated lines selected from different varieties were higher than that of synthetics composed of lines from the same variety. In synthetics composed of selfed lines, component lines more than 6 seem to be necessary to avoid inbreeding depression. Futhermore, even with parents from maternally selected lines inbreeding would be unavoidable when lines are closely related. Considering the heterosis effect on yield and inbreeding, alfalfa breeder should determine combination and the number of component lines to be used to produce a synthetic variety.
Citation
Seki, M; Fujimoto, F; Inami, S; and Kanbe, M, "Heterosis Effect in Advanced Generations of Synthetic Varieties of Alfalfa" (1985). IGC Proceedings (1985-2023). 11.
(URL: https://uknowledge.uky.edu/igc/1985/ses2/11)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Heterosis Effect in Advanced Generations of Synthetic Varieties of Alfalfa
Kyoto Japan
Heterosis effect in advanced generations of synthetic varieties of alfalfa, Medicago sativa L., using component lines bred for one breeding objective and those using unrelated component lines for different objectives was investigated. Heterosis effect in yield in advanced generations of synthetic variety composed of unrelated lines selected from different varieties were higher than that of synthetics composed of lines from the same variety. In synthetics composed of selfed lines, component lines more than 6 seem to be necessary to avoid inbreeding depression. Futhermore, even with parents from maternally selected lines inbreeding would be unavoidable when lines are closely related. Considering the heterosis effect on yield and inbreeding, alfalfa breeder should determine combination and the number of component lines to be used to produce a synthetic variety.
