Selecting Oat Lines for Yield in Low-Productivity Environments

Atlin, G.N. and Frey, K.J. (1990) Selecting Oat Lines for Yield in Low-Productivity Environments. Crop Science, 30 (3). pp. 556-561.

[img] PDF - Published Version
Restricted to ICRISAT researchers only

Abstract

Cultivars for use in low-productivity environments (LPE) can be selected directly, in LPE, or indirectly, in medium- or high-productivity environments (MPE or HPE, respectively). These contrasting strategies were compared by means of predictions and an empirical selection experiment in which random populations of oat lines were selected for grain yield in LPE, MPE and HPE; selected lines were then evaluated at each productivity level. The influence of replication (across environments) of the selection unit on the relative effectiveness of direct and indirect selection for yield in LPE was also examined. At low levels of replication, the greatest predicted and realized response in LPE resulted from selection in MPE. However, when replication was increased, direct selection was more effective. A positive correlation between degree of replication and the relative effectiveness of direct selection in LPE is expected when heritability (h2) is greater in HPE than in LPE and when the genetic correlation (rG) between yield in HPE and in LPE is less than one. The results indicated that separate breeding programmes may result in the greatest yield gains for some low-productivity cropping systems. Estimates of h2 in HPE and LPE, and rG between yields in HPE and LPE, could be used to predict such situations

Item Type: Article
Additional Information: SNNigam Collection
Author Affiliation: Department of Plant Sciences, Nova Scotia Agricultural College, PO Box 550, Truro, Nova Scotia B2N 5E3, Canada.
Subjects: Plant Production
Divisions: General
Depositing User: Mr B Krishnamurthy
Date Deposited: 25 Apr 2013 09:10
Last Modified: 25 Apr 2013 09:10
Official URL: http://dx.doi.org/10.2135/cropsci1990.0011183X0030...
URI: http://eprints.icrisat.ac.in/id/eprint/10344

Actions (login required)

View Item View Item
EPrints Logo
eprints is powered by EPrints 3 which is developed by the School of Electronics and Computer Science at the University of Southampton. More information and software credits.