Genotype and genotype × environment interaction effects on the grain yield performance of cowpea genotypes in dryland farming system in South Africa. - Gerrano, Abe Shegro; Jansen van Rensburg, Willem Sternberg; Mathew, Isack; Shayanowako, Admire I. T.; Bairu, Michael Wolday; Venter, Sonja Louise; Swart, Wijnand; Mofokeng, Alina; Mellem, John; Labuschagne, Maryke (Euphytica, 2020)