ESWYT

AcronymDefinition
ESWYTElite Spring Wheat Yield Trial (International Maze and Wheat Improvement Center; Mexico)
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The individual dendrograms generated from SHMM analysis for each of the 20 yr of ESWYT are summarized in Table 4.
The other highly associated key site, Sakha, although producing two equally important year groupings at the second fusion level, showed that at the third fusion level of the dendrogram derived from pattern analysis, half of the ESWYT years fell into the same primary grouping.
The ESWYT trials sown at this location were fully irrigated thereby reducing genotype x year interactions attributable to variation in rainfall and average yield was high (6.
The four key clusters observed from pattern analysis of sites repeated at least three times during the 20 yr in which ESWYT was grown are influenced by temperature, rainfall, latitude, altitude, and disease incidence.
This finding is supported by our study as the ESWYT was grown across a range of soil moisture conditions, and cropping season water availability was clearly a primary differentiating factor.
Abbreviations: CIANO, Centro de Investigaciones Agricolas del Noroeste; CIMMYT, Centro Internacional de Mejoramiento de Maiz y Trigo (International Maize and Wheat Improvement Center); COI, crossover interaction; ESWYT, Elite Spring Wheat Yield Trial; GEI, genotype x environment interaction; SHMM, shifted multiplicative model.
We decided to compare the mean of the five highest yielding entries in each nursery as the majority of lines in the ESWYT and SAWYT trials are not expected to be adapted at any specific location.
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