the Symposium on Wheats for More Tropical Environments - cimmyt

29. Table 3. Correlation coefficients between yield and climatological parameters, 28 locationsin 15 countries, 1984ParameterYieldAverage minimum temperatureMonth of sowingMonth after floweringAverage maximum temperatureMonth of sowingMonth after floweringAverage relative humidityMonth of sowingMonth after floweringRange800-10,1 00 kg/ha3.7-23.6 0 C8.7-20.8OC12.0-36.1°C14.8-32.4 0 C37-86 0 /038-89 0 /0Correlationcoefficientwith yield-.40*-.51**-.16-.33-.45*-.40**, ** Significant at <strong>the</strong> 5 and 1 % levels, respectivelyTable 4. Relative yields and days t~. flowering of six wheat varieties in traditional and tropicalwheat-growing areasDays to flowering as 0/0Yield as % of location mean of location meanNaco- Sona- Qui- Naco- Sona- Qui-Location Ures Pavon zari UP262 lika mori Ures Pavon zari UP262 Iika moriTraditional areaCd. Obregon, Mexico 120 115 114 90 104 82 107 101 96 90 82 86Faisalabad, Pakistan 108 112 127 92 95 101 105 97 97 93 87 89Tropical areaChiang Mai, Thailand 70 96 96 144 83 180 117 110 83 87 80 81Villa Guede, Senegal 96 101 87 105 87 81 113 98 89 89 81 93Campinas, Brazil 94 108 104 112 117 94 114 98 90 87 80 88Source: The 18th ISWYN, CIMMYT, Mexico