Screening of maize germplasm under Striga and Striga-free environments in Kenya and sudan for grain yield and related agronomic traits. - Nairobi (Kenya) KARI|CIMMYT : 2002 - p. 156-158 - Printed
Forty two germplasm entries were evaluated at Alupe under Striga (artificial infestation) and under optimum environments (Striga-free) and at Wad Medani in Sudan under a Striga-sick environment to identify suitable varieties for Striga-prone areas. Data were taken on ear aspect, ears per plant, rotten ears, maize stand at harvest, two Striga counts at 60 and 80 days after planting, and grain yield. Seven varieties were identified at Alupe (Striga-free) as superior to aII checks during long rains of 1999, while only four varieties were superior to the checks under Striga-infested conditions. At Wad Medani, there was no significant difference among tested varieties. Wad Medani is a drought-prone site and drought stress affected the expression of variety performance under Striga. This suggests that it is more difficult to select germplasm under more than one stress at the same time. Striga count and grain yield did not show a strong relationship as some varieties had both low Striga count and low grain yield. A further look at three varieties that gave yields of 7.2, 7.6 and 8.7 tonnes per hectare is recommended to verify their performance for utilization in the Striga tolerance/resistance breeding programme.