Query (optional)   in Class  All Allele Author Colleague Collection Assembly Gene Gene Class Gene Product Germplasm Image Journal Keyword Library Locus Map Map Data Marker Pathology Polymorphism Probe Protein QTL Rearrangement Reference Sequence Species Trait Trait Study Two Point Data  

---

GrainGenes Reference Report: JID-96-157

[Submit comment/correction]

Reference	JID-96-157
Title	Response of durum wheat cultivars to Algerian environments - I. Yield
Journal	Journal of Agriculture and Environment for International Development
Year	2002
Volume	96
Pages	157-187
Author	Annicchiarico P [ Show all 15 ]
Abstract	Grain yield of 24 durum wheat cultivars was evaluated for 2 years in 17 Algerian locations to: (i) investigate genotype x environment interactions, especially genotype x location (GL) , and the environmental factors contributing to it; (ii) establish models of GL effects, and assess the merit of different cultivars both for cultivation and as genetic resources. GL effects were fairly large (65%) relative to genotype main effects, genotype x location x year effects were even larger, as estimated by components of variance. Additive Main effects and Multiplicative Interaction (AMMI) with one GL interaction principal component (PC 1), and factorial regression including winter mean temperature (across January and February) and annual rainfall as first and second site covariate, respectively, were somewhat preferable to joint regression. They provided similar information, as showed by correlations of site PC 1 score with winter temperature and rainfall amount and of genotype PC 1 score with partial regression coefficients for entry response to winter temperature and rainfall amount. Crossover interaction among best-ranking material occurred mainly across locations with contrasting winter temperatures. Cultivar recommendations, which were defined according to the pair of top-ranking cultivars at each site, were notably simplified by the use of modelled yields instead of observed yields. GTA Dur and, to a lesser extent, Chen's, could be recommended at most sites. Simeto was preferable for lowland, favourable locations; Ofanto for inland, cold- and drought-prone locations; and Sahel 77 for a few dry and mild-winter sites. Landrace material may be preferable only in extremely harsh environments. The average estimated yield gain from adoption of recommended cultivars in place of currently grown ones was greater than 10%, being relatively higher for stress-prone sites. Improved Algerian cultivars showed no yield advantage relative to traditional cultivars for unfavourable environments. Genotype variation for temporal yield stability was limited among well-performing material, with a trend for Om Rabi 9 towards higher stability
Keyword	crop yield [ Show all 14 ]

GrainGenes is a product of the Agricultural Research Service of the US Department of Agriculture.