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dc.contributor.authorYang, R.
dc.contributor.authorBlade, S.
dc.contributor.authorCrossa, J.
dc.contributor.authorStanton, D.
dc.contributor.authorBandara, M.
dc.date.accessioned2019-12-04T11:18:51Z
dc.date.available2019-12-04T11:18:51Z
dc.date.issued2005
dc.identifier.citationYang, R., Blade, S., Crossa, J., Stanton, D. & Bandara, M. (2005). Identifying isoyield environments for field pea production. Crop science, 45(1), 106-113.
dc.identifier.issn0011-183X
dc.identifier.urihttps://hdl.handle.net/20.500.12478/3338
dc.description.abstractCultivars are often recommended to producers based on their averaged yields across sites within a geographic region. However, this geography-based approach gives little regard to the fact that not all sites in a given region have the same level of production capacity. The objective of this paper was to describe a performance-based approach to identifying groups of sites with similar yielding ability (i.e., isoyield groups), but not necessarily contiguous, and its use for analyzing the yield data from field pea (Pisum sativum L.) cultivar trials conducted across the Province of Alberta, Canada, from 1997 to 2001. Of 34 sites tested during the 5 yr, 11 were in 1997, 20 in 1998 and 2000, 22 in 1999, and 21 in 2001. The consecutive use of regression analysis and cluster analysis allowed for classification of test sites in individual years into different isoyield groups: six in 1997; 10 in 1998, 2000, and 2001; and 12 in 1999. However, the most meaningful isoyield groups were those based on the data across the 5 yr through a normalization procedure developed for averaging the multiyear unbalanced data. The use of such averages significantly lessens the impact of random year-to-year variation on the sites, resulting in only seven isoyield groups for the 34 test sites. The identification of isoyield environments (i) facilitates choosing appropriate cultivars for specific environments and (ii) provides a basis for scaling down the cultivar testing program in Alberta.
dc.language.isoen
dc.subjectIsoyield Groups
dc.subjectCultivars
dc.subjectGenotypes
dc.subjectDendrogram
dc.subjectClusters
dc.subjectNontraditional Crops
dc.titleIdentifying isoyield environments for field pea production
dc.typeJournal Article
dc.description.versionPeer Review
cg.contributor.affiliationAlberta Agriculture, Food and Rural Development
cg.contributor.affiliationUniversity of Alberta
cg.contributor.affiliationInternational Institute of Tropical Agriculture
cg.contributor.affiliationInternational Maize and Wheat Improvement Center
cg.coverage.regionAcp
cg.coverage.regionAfrica
cg.coverage.regionNorth America
cg.coverage.regionWest Africa
cg.coverage.countryCanada
cg.coverage.countryMexico
cg.coverage.countryNigeria
cg.isijournalISI Journal
cg.authorship.typesCGIAR and advanced research institute
cg.iitasubjectPlant Genetic Resources
cg.iitasubjectPlant Production
cg.iitasubjectPlant Breeding
cg.iitasubjectPlant Diseases
cg.iitasubjectPests Of Plants
cg.iitasubjectFood Security
cg.iitasubjectLivelihoods
cg.iitasubjectAgribusiness
cg.iitasubjectPost-Harvesting Technology
cg.iitasubjectHandling, Transport, Storage And Protection Of Agricultural Products
cg.iitasubjectSmallholder Farmers
cg.iitasubjectGenetic Improvement
cg.iitasubjectCrop Husbandry
cg.accessibilitystatusLimited Access
local.dspaceid95012
cg.identifier.doihttp://dx.doi.org/10.2135/cropsci2005.0106


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