The materials used for the present study consisted of fourteen kenaf genotypes (G) which were evaluated over six environments (three at Ismailia Governorate, two at Giza Governorate and one at El-Beheira Governorate) through three successive seasons (2009 to 2011). in Egypt. The analysis of variance revealed highly significant differences among genotypes, environments and G x E interaction for all studied traits, indicating a wide range of variation among genotypes, environments and these genotypes exhibited differential response to environmental conditions. The significant variance due to residual for all characters indicated that genotypes differed with respect to their stability suggesting that prediction would be difficult, which means that mean performance alone would not be appropriate. Interaction component of variance (σ 2 ge) was less than the genotypic variance (σ 2 g) for all characters. This means that genotypes differ in their genetic potential for these traits. The observed narrow range between phenotypic and genotypic coefficients of variability with high heritability in broad since for fiber percentage. Also, fiber weight per plant, technical stem length and plant height showed similar results, indicating possibility of using these three yield traits in selection criteria with giving more weight for fiber weight per plant and technical stem length for improving green stalk yield per plant in turn fiber yield. The criterion, yield stability (YSi) statistic indicated that S.105/2 and S.113 were proved to be superior in yield and stability for all characters studied as well as three genotypes, S.96/20, Giza3 and S.8 were stable for most characters studied. Therefore, the two genotypes (S.105/2 and S.113) maintained mean performance advantage across nearly all the environments sampled by maintaining high level for the above-mentioned traits and they are recommended to be released as commercial stable high yielding cultivars and/or to be incorporated in kenaf breeding program for producing stable high yielding lines. Phenotypic correlation coefficients among green stalk weight with other related characters of kenaf, indicated that, plant height, technical stem length, and fiber percentage are the major components contributing to green stalk weight per plant. Therefore, selection for these traits will improve green stalk weight per plant and in turn fiber yield in kenaf.

The present investigation was conducted using sixteen flax genotypes, thirteen local lines and three commercial varieties (Giza 8, Sakha 1 and Sakha 3) as check. These sixteen genotypes were evaluated in two successive seasons (2012/2013 and 2013/14) at two locations viz: Giza Exp. Station, Giza Governorate (normal soil) and Ismailia Exp. Station, Ismailia Governorate (sandy soil). The experimental design was randomized complete block with three replications per each of the four environments (combination of locations x years). Mean squares due to genotypes (G) showed highly significant for all characters, indicating the presence of genetic variability among the tested genotypes for all traits under study. Mean squares due to locations (L) differed highly significantly for all traits except no. of seeds per capsule, indicating a wide range of variation between the two locations under study. Mean squares due to GL interaction were comparable in magnitude to those of GY for straw, long fiber yields per fad, plant height, technical stem length, seed yield per fad, oil yield per fad, 1000-seed weight and no. of capsules per plant, indicating that location had the major effect on the relative genotypic potential of these treats. This means that for reliable evaluation of the previous traits it would certainly be necessary to test genotypes in more than multi-location testing. Interaction components variances (σ 2 gl, σ 2 gy and σ 2 gly) were less than the genotypic variance (σ 2 g) for all characters. This means that genotypes differ in their genetic potential for these traits. This was reflected in high heritability in broad sense and low discrepancy between phenotypic and genotypic coefficients of variability specially for long fiber percentage, plant height, technical stem length, 1000-seed weight, no. of capsules per plant and oil percentage. These results indicating the possibility of using both of plant height and technical stem length as selection indices for improving straw weight per plant and using both of 1000-seed weight and no. of capsules per plant for improving seed weight per plant. S.541-D/10 and S.541-C/3 proved maximum mean performance for straw, long fiber yields per fed, plant height and technical stem length as well as long fiber percentage when compared with the three check varieties, Giza 8, Sakha 1 and Sakha 3. Also, S.541-C/3 and S.541-D/10 exhibited high tolerance to sandy soil conditions for both straw yield per fed and fiber yield per fad. Therefore the two promising lines, S.541-C/3 and S.541-D/10 may be consider good substitutes for the low yielding ones, Giza 8, Sakha 1 and Sakha 3 in future as a new Egyptian flax cultivars for both straw and fiber yields. Also, S.541-C/3, S.541-D/10 and Sakha1 exhibited highest values for seed yield per fad, oil yield per fad, seed weight per plant and 1000-seed weight than other genotypes. It can be concluded that, S.541-D/10 gave high yielding ability for seed yield/fad, oil yield per fad, seed weight per plant and oil percentage with moderate toleran...

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