Developmental stability in oats I. Yield

Abstract

Gullord. M. and Aastveit. A.H. 1987. Developmental stability in oats. I. Yield. —Hereditas 106: 195–204. Lund, Sweden. ISSN 0018–0661. Received July 14, 1986 This paper deals with stability of Nordic oat lines and cultivars over years and locations. In one series during the years 1981–84 significant interaction between genotypes and locations, and between genotypes and years was found for grain yield. The former interaction component of variation was splitted up into ecovalences, linear regressions and deviations from linearity, and principal components. The main results can be summarized as follows: There seems to be good agreement between the stability parameters calculated by the different methods. The principal component methods both divided the cereal growing area in Norway into the following four sub‐regions: Northern inland, Southern inland, South‐western areas and Mid‐Norway. Temperature and rainfall from tillering until harvest had large influences and opposite effects on the genotype‐location interaction. KA1 and PA1 also contributed to the interaction. There was a large genetic variation in developmental stability for grain yield. No close relationship was found between average grain yield and stability over a range of environments. Copyright © 1987, Wiley Blackwell. All rights reserved