Sissoko, S. and Tékété, M.L. and Kouressy, M. and Thera, K. and etl, .
(2018)
Combined agronomic and climatic approaches for
sorghum adaptation in Mali.
African Journal of Agricultural Research, 13 (35).
pp. 1816-1827.
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Abstract
In Sub-Saharan Africa, Genotype-Environment interaction plays a key role in formulating strategies for
crop improvement. Multi-location trials have created enabling structure to determine varieties yield
performance and stability. Crop modeling led to prediction of long-term and spatial effects of climate
variability. Three improved varieties were compared to three landraces. Optimum cultivation areas
minimizing the risk of crop failure were delineated by comparing predicted flowering dates and end of
rainy seasons. Agronomic values were determined in trials from three climatically different zones in 27
farms. Yield stability was determined using linear regression depending on each environmental mean
and the AMMI model. Photoperiod sensitive varieties have wider optimal cultivation areas whereas
early-maturing varieties (photoperiod insensitive) are subjected to strong constraints on sowing date.
In low productivity conditions, landraces and improved varieties are not distinct. As the environmental
cropping conditions increase, improved lines become significantly superior to landraces. Photoperiod
insensitive landrace is subservient to climate conditions of its area of origin and its productivity drops
sharply when moved to a wetter area. Varieties studied combined productivity and stability traits. These
findings are important steps toward breeding climate resilient varieties for meeting the challenges of
climate smart agriculture and sustainable intensification.
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