Summary
Relationships that exist among grain yielding ability and response and stability of grain yields when tested over variable environments were examined. Two sets of oats lines were tested over many environments that had wide ranges in productivities. The lines in each set were divided into high-, medium-, and low-yielding groups on the basis of means across all environments, and variance components for genotype × environment interactions and means of regression responses and coefficients of determination were computed for the three yield categories in each set.
Mean grain yields for the high-, medium-, and low-yielding groups across both sets of oats lines were 2.7, 2.3, and 1.9 Mg ha-1, respectively. Coefficients of variability for the genotype × environment interaction were 18%, 16%, and 12% for the high-, medium-, and low-yielding categories, respectively. Means for regression responses were 1.22 for the high group, 0.99 for the medium, and 0.78 for the low. Most responses for the high and low groups were significantly different from 1.0. Means for coefficients of contingency were 0.63, 0.56, and 0.51 for the high-, medium-, and lowyielding groups, respectively.
There was a positive relationship between mean grain yield and response of grain yield to improving environments. Thus, high yielding lines are also the responsive lines. Our study gave conflicting results about stability of production for the three yield groups. Coefficients of variation for genotype × environment interaction indicated that the high-yielding group was more interactive with environments than were the medium- and low-yielding ones: However, the means for coefficients of contingency indicated that the high yielding group was the most stable.
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References
AllardR. W. & A. D.Bradshaw, 1964. Implications of genotype × environmental interactions in applied breeding. Crop. Sci. 4: 503–508.
BaihakiA., R. E.Stucker & J. W.Lambert, 1976. Association of genotype × environment interactions with performance level of soybean lines in preliminary yield tests. Crop Sci. 16: 718–721.
EberhartS. A. & W. A.Russell, 1966. Stability parameters for comparing varieties. Crop Sci. 6: 36–40.
FedererW. T. & D.Raghavarao, 1975. On augmented designs. Biometrics 31: 29–35.
FinlayK. W. & G. N.Wilkinson, 1963. The analysis of adaptation in a plant breeding programme. Aust. J. Agric. Res. 14: 742–754.
HornerT. W. & K. J.Frey, 1957. Methods for determining natural areas for oat varietal recommendations. Agron. J. 49: 313–315.
JowettD., 1972. Yield stability parameters for sorghum in East Africa. Crop Sci. 12: 314–317.
LangerI., K. J.Frey & T. B.Bailey, 1978. Production response and stability characteristics of oat cultivars in different eras. Crop Sci. 18: 938–942.
MillerP. A., H. F.Robinson & O. A.Pope, 1962. Cotton variety testing: Additional information on variety × environment interactions. Crop Sci. 2: 349–352.
PinthusM. J., 1973. Estimate of genotypic value: A proposed method. Euphytica 22: 121–123.
RasmussonD. C. & J. W.Lambert, 1961. Variety × environment interactions in barley variety tests. Crop Sci. 1: 261–262.
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Journal Paper No. J-12128 of the Iowa Agric. and Home Econ. Exp. Stn., Ames, IA 50011. Project 2447.
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Adegoke, A.O., Frey, K.J. Grain yield response and stability for oat lines with low-, medium-, and high-yielding ability. Euphytica 36, 121–127 (1987). https://doi.org/10.1007/BF00730655
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DOI: https://doi.org/10.1007/BF00730655