SAWYT

AcronymDefinition
SAWYTSemi Arid Wheat Yield Trial
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The significantly greater rates of progress in yield over time recorded for the SAWYT compared with ESWYT for both high and low yielding environments reflects, to some extent, the slightly higher average TM yields recorded for ESWYT.
This association reflects the lack of photoperiod response in the CIMMYT materials included in the SAWYT nurseries.
Four Iranian sites returned yield data for the 2nd SAWYT, making it the best represented country in the West Asian region.
The Sudanese site expressed little if any association with any of the SAWYT sites.
As no Indian site was sown to SAWYT for more than one year, we could not include India in the comparison.
Many of these locations were sown only once to the SAWYT and are indicated in Table 3.
Therefore it is not surprising that SAWYT genotypes, developed under moderate to severe terminal moisture stress, differentiated differently for yield in the Southern Cone.
A small number of genotypes, ranging from 5 to 10, were in common between years in comparisons between specific SAWYT trials (Table 4).
Abbreviations: CIMMYT, International Maize and Wheat Improvement Center; SAWYT, Semi Arid Wheat Yield Trial; CIANO, Centro de Investigaciones Agricolas del Noroeste; GEI, genotype x environment interaction; COI, crossover interaction; SHMM, shifted multiplicative model; SREG, site regression model; SED, squared Euclidean distances.
Locations returning yield data for the 1st through 6th SAWYTs in each geographic region.
In this study, the SHMM clustering procedure for grouping sites without COI (Crossa et al., 1993) was applied to each of the six SAWYTs, and clusters of sites with negligible COI were found.
Only sites that occurred in two or more SAWYTs were included in the overall pattern analysis.