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.
1] of sites ESWYT 1 1979 5 12 17 ESWYT 2 1980 8 10 18 ESWYT 3 1981 9 12 21 ESWYT 4 1982 9 18 27 ESWYT 5 1983 13 21 34 ESWYT 6 1984 23 28 51 ESWYT 7 1985 29 31 60 ESWYT 8 1986 17 24 41 ESWYT 9 1987 24 30 54 ESWYT 10 1988 18 19 37 ESWYT 11 1989 39 29 68 ESWYT 12 1990 29 34 63 ESWYT 13 1991 22 20 42 ESWYT 14 1992 6 24 30 ESWYT 15 1993 19 25 44 ESWYT 16 1994 22 28 50 ESWYT 17 1995 19 30 49 ESWYT 18 1996 27 32 59 ESWYT 19 1997 20 30 50 ESWYT 20 1998 8 30 38 SAWYT 1 1991 14 14 28 SAWYT 2 1992 15 11 26 SAWYT 3 1993 15 6 21 SAWYT 4 1994 18 4 22 SAWYT 5 1995 22 15 37 SAWYT 6 1996 19 14 33 SAWYT 7 1997 14 7 21 Total number of Sites 483 558 1041
This association reflects the lack of photoperiod response in the CIMMYT materials included in the SAWYT nurseries.
Unfortunately, the 2nd SAWYT was not sown in Mexico, so comparisons between these sites and Mexican locations cannot be made.
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.
of times grouping Sites clustering with CIANO with CIANO 1st SAWYT Sudan; Gezira Res.
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).
Number of groupings/Total number of possible groupings SAWYT compa- Argen- Argen- rison Nepal Bolivia tina tina Pakistan ([dag- Mexico Bhai- San Canada M.
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.