Summary
Eight oat cultivars and experimental lines from four germplasm sources were crossed in a diallel mating design without reciprocals. F1 heterosis for grain yield was evaluated in two experiments, and 48 F2-derived lines from each of the 28 matings were evaluated for bundle weight, grain yield, straw yield, harvest index, height, and heading date in two experiments. Number of transgressive segregates per trait and generalized genetic variance were calculated for each mating. Genealogical distance for each mating was obtained by using coefficient of kinship based on the pedigree of the parents. The relationship between genealogical distance and the three types of breeding behaviour was examined via correlation and regression. Significant correlations occurred only for genealogical distance with numbers of transgressive segregates for height and with generalized genetic variances. Both were positive. Significant heterosis was observed for matings of more distantly related parents. Regressions on genealogical distance, when significant, were linear. Genealogical distance between parents was positive associated with diversity on the basis of breeding behavior.
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Journal Paper No. J-11874 of the Iowa Agriculture and Home Economics Station, Iowa State Univ., Ames, IA 50011. Project 2447.
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Cowen, N.M., Frey, K.J. Relationship between genealogical distance and breeding behaviour in oats (Avena sativa L.). Euphytica 36, 413–424 (1987). https://doi.org/10.1007/BF00041484
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DOI: https://doi.org/10.1007/BF00041484