Evaluation of some common bean genotypes under different climatic conditions

This study was carried out in Agricultural Experiments and Researches Station of Faculty of Agriculture, Cairo University, and included three parts. The first part aimed to evaluate the performance of seventeen common bean genotypes, as compared with the local common bean Nebraska, concerning dry seed production and nutritive value of seeds. Seeds were sown on 23rd February in the first season and on 1st March in the second season of 2007 and 2008, respectively. The second part aimed to evaluate sixteen snap bean genotypes as compared with the commercial snap bean Tema as a control under the high temperature conditions, regarding vegetative growth, yield and its components. Seeds were sown on 10th June in the first season and on 13th June in the second season of 2007 and 2008, respectively. The third part aimed to evaluate fourteen snap bean genotypes, as compared with the commercial snap bean (Baulista), as to vegetative growth, yield and its components under low temperature conditions. Seeds were sown on 28th October in the first season and on 5th November in the second season of 2007/2008 and 2008/2009, respectively. A randomized complete block design with three replicates was used for caring out the three experiments. The results of the first part experiment indicated that genotypes 69 528, 25684,46920, Comtesse Chamberd and Line 4 produced the highest pod number per plant while, genotype 69 528, followed by 25 684 produced the highest weight of pods per plant. On the other hand the highest average pod weight was recorded for genotype 28 695 followed by common bean (Nebraska). Pods of Blue-lake contained the highest number of seeds per pod followed by (Comtesse Chamberd), Line1 and Line5. Line 69 528 had the highest pod and seed yield per feddan while seeds of Comtesse Chamberd had a higher percentage of crude protein than the control while, Seeds of common bean (Nebraska) significantly had the highest percentage of total carbohydrates in both seasons. The results of the second part experiment revealed that the longest pod of snap bean was obtained by Lines 11 and 18 with significant differences as compared with snap bean (Tema). On the other hand, genotype (RR-25) had the highest early, marketable and total yield with significant differences as compared with all genotypes. Line 10 significantly had the highest chlorophyll content in leaves as well as percentage of total carbohydrates in pods in both seasons. Correlation between total yield of snap bean pods and pod weight was found and positive but it was too small to be significant. The results of the third part experiment showed that Line 24, 25, 26, 27, 31 produced the highest pod number and weight of pod per plant. On the other hand Lines 24 and 27 had the highest early, marketable and total yield. Pods of Lines 22 and 26 had higher percentage of crude protein while, Pods of Lines 21,24, 25,26,27,28 and 31 had the highest percentage of carbohydrates. Leaves of all bean genotypes, except Line 27 significantly contained higher IAA and Phenols than Baulista in both seasons.