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Gains from direct and indirect grain yield selection in oats avena sativa



Gains from direct and indirect grain yield selection in oats avena sativa



Zeitschrift fuer Pflanzenzuechtung 90(4): 316-323



Grain yield (GYD) of oats (A. sativa L.) can be quantified as the product of growth rate (GR) .times. growth duration (GD) .times. harvest index (HI). GD in Iowa [USA] is restricted to 100-110 days, HI has been optimized at 45%, but GR has not been exploited by selection. Predictions and simulations of selection indicate that GYD can be improved by indirect selection via GR. This hypothesis was tested by practicing selection in 12 oat populations, which included 678 lines. The selection criteria were: GYD, HI, GR, HI + GR and GYD + HI + GR. Mean gain in GYD from indirect selection via GR amounted to 80% of that obtained from direct GYD selection. GR appears to be a useful selection criterion for improving GYD in oats.

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Accession: 005500144

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