Selection environment and environmental sensitivity in barley

Ceccarelli, S. and Grando , S. (1991) Selection environment and environmental sensitivity in barley. Euphytica, 57 (2). pp. 157-167.

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Abstract

Groups of 10 barley genotypes were selected for high grain yield under either high yielding (2 groups) or low yielding conditions (2 groups). The genotypes had a similar average grain yield across a wide range of yielding conditions, but differed in their linear response over environments (environmental sensitivity). The genotypes selected for high grain yield under low yielding conditions were less sensitive to changing environments than genotypes selected for high grain yield under high yielding conditions. The higher stability of genotypes selected under low yielding conditions was shown by both the linear regression analysis and the comparison of coefficients of variation. The use of a safety-first index showed that the probability of a crop failure of genotypes selected for high grain yield under high yielding conditions was between 1.8 and 2.7 times higher than for genotypes selected for high grain yield under low yielding conditions. The development of new cultivars for areas where a large proportion of the crop is grown by subsistence farmers should therefore be based on selection under low yielding conditions

Item Type:	Article
Additional Information:	SNNigam Collection
Uncontrolled Keywords:	Hordeum vulgare, barley, stability, subsistence agriculture
Author Affiliation:	The International Center for Agricultural Research in the Dry Areas (ICARDA), PO Box 5466, Aleppo, Syria
Subjects:	Environmental Science
Divisions:	Other Crops
Depositing User:	Mr B Krishnamurthy
Date Deposited:	25 Sep 2013 09:02
Last Modified:	25 Sep 2013 09:02
Official URL:	http://dx.doi.org/10.1007/BF00023074
URI:	http://eprints.icrisat.ac.in/id/eprint/11807

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