Mazengo, Karantin David2026-08-282026-08-282017https://www.suaire.sua.ac.tz/handle/20.500.14820/7927DissertationA study was conducted to evaluate common bean (Phaseolus vulgaris L.) genotypes for drought tolerance in Southern Highlands of Tanzania. Eighteen genotypes were selected for conducting experiments in the field and screen house,on June, 2015. The field experiment was conducted at Inyala Agricultural Training Institute while the screen house experiment was laid out at Uyole Agricultural Research Institute. Experiments were laid out in a 3x18 split plot arranged in randomized complete block design (RCBD) with 3 replications. Results for seed yield under stress and non-stress condition were used to calculate yield indices which were used to predict tolerant bean genotypes. Results showed significant differences (p < 0.05) of yields across genotypes and water treatments. Genotypes BFS60, KG 104-72 and SERI6 yielded highest under stress at flowering while genotype KG4-30, RCB266, KG25-21 and KG 104-72 yielded highest under stress at mid pod filling. Selection indices, such as yield index (YI) selected BFS60 as most tolerant genotype followed by KG 104-72 and SER 16 while Stress tolerance index (STI) selected SER 16 followed by BFS60 and KG 104-72; Stress susceptibility percent index (SSPI) selected RCB266 followed by SER 16, 41-EX-VAM and SER83 as most tolerant genotypes. Genotypes SER 16, BFS60, KG 104-72 and CZ109-22 were found as most tolerant genotypes when the means of rankings of yield indices ranked. Correlation analysis showed that yields under non stress condition (Yp) were significant and positively correlated with YI, STI and SSPI, while yields under stressed condition (Ys) were significant and positively correlated with YI and STI. On the other hand, yields under (Ys) were not significant and negatively correlated with SSPI. Genotypes (SER 16, BFS60 and KG 104-72) are among of the most tolerant to drought conditions, therefore, can be used as parental materials in breeding for drought tolerance.enCommon bean (phaseolus vulgaris l.)Southern HighlandsEighteen genotypesRCBDTanzaniaThesis