Evaluation of (Sesamum indicum L) genotypes for yield stability and selection in Nigeria

Abstract

After years of preliminary and advanced yield trials, seven advanced beniseed genotypes were selected for on-station evaluation at NCRI, Badeggi in 1996 and 1997. Four genotypes identified as promising lines were selected with the farmers' variety (Yandev-55) for multi-locational on-farm evaluation in six states. The states included Benue, Nasarawa, Jigawa, Kano, Kaduna and Taraba. The result obtained showed that two genotypes 530-6-1 and E-8 gave the highest yield across the locations. Also the linear responses of the genotypes indicated E-8 to have average response to environments with b value greater than unity. This shows that E-8 has the potential to grow well under favourable condition. Other genotypes 530-6-1, Type 4 (1), Goza-25 and the check (Yandev 55) have b values less than Unity, which was an indication of better performance under poor environmental condition. For the stability parameters, the mean deviation from regression coefficient also proved the four genotypes to have average stability and general adaptability. The yield rank-sum over locations indicated no consistency among the genotypes, which suggested lack of specific adaptation to a particular environment among the tested genotypes.



[Niger Agric. J. 33 (2002): 76-82]