Genetic diversity of midwestern oat germplasm

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1985
Authors
Cowen, Neil
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Agronomy

The Department of Agronomy seeks to teach the study of the farm-field, its crops, and its science and management. It originally consisted of three sub-departments to do this: Soils, Farm-Crops, and Agricultural Engineering (which became its own department in 1907). Today, the department teaches crop sciences and breeding, soil sciences, meteorology, agroecology, and biotechnology.

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The Department of Agronomy was formed in 1902. From 1917 to 1935 it was known as the Department of Farm Crops and Soils.

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1902–present

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  • Department of Farm Crops and Soils (1917–1935)

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Agronomy
Abstract

Nine oat cultivars and experimental lines from four germplasm sources were crossed in a diallel mating design without reciprocals. F(,1) heterosis for grain yield was evaluated in two experiments, and 48 F(,2)-derived lines from each of the 36 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. Four measures of genetic distance between the parents were calculated: geneological distance, Euclidean distance based upon principal components, and the distance measures proposed by Hanson and Casas and Cervantes et al. The relationships between the four distance measures and the three types of breeding behavior were examined via correlation and regression. Correlations, where significant, were low to moderate. Regressions, where significant, were primarily linear with low R('2) values. The regression of heterosis on Euclidean distance in one experiment was quadratic with a high R('2) value. Using information from more than one distance measure improved the R('2) values for polynomial regression.

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Tue Jan 01 00:00:00 UTC 1985