This investigation aimed to observe genotypic stability (with respect to pods yield) of thirteen local okra genotypes across three locations: Kaha Horticulture Research Station, Kaluobia Governorate, Experimental Farm of the Desert Research Center at Ras Sudr, South Sinai Governorate location 1,2 (both salinity condition). In addition to group, the genotypes having similar response pattern over all environments. Moreover, studying the effect of salinity conditions on plant growth performance. Multienvironmental trials (MET), generally, have significant main effects and significant multiplicative genotype x environment interaction effect. AMMI (Additive main effect and multiplicative interaction analysis) offers a more appropriate statistical analysis to deal with such situations, compared to traditional methods like ANOVA, PCA and Linear regression.The results showed that (I) the obtained results satisfied one of the breeder's goals for selecting the best-suited genotype for cultivation in a wide salinity range of environments; (II) the analysis of variance of thirteen local okra genotypes in three locations (Kaha, Ras sudr 1 and Ras sudr 2) shows that genotype (G), environment (E) and their interaction were significante (P<0.01) for genotype; (III) the AMMI model was very effective for studying GEI interaction, the first bilinear AMMI (IPCA1) model terms accounted for 71.268%; (IV) no genotype has superiority performance in under all studied environments; although, the biplot shows that the genotypes BG9, BG6, BR27 and BR20 are best-suited for cultivation in a wide range of environments; (V) the salt stress has affected the Okra plant growth and development.
Salinity is one of the major problems which hampers yield production. Salinity stress can be perceived either in the soil or irrigation water. Forty rice germplasms were selected based on their origin country. Salinity level at 12dSm−1 were imposed at seedling stage (10 Days after sowing). The findings observed shoot length and root length were decreased under salt stress. Although, the rice germplasms responded to salt stress differently, however, leaf injury score and percent of survival seedlings successfully differentiated the salt tolerant genotypes. BULASTOG, AZUCENA and ZHEN-LONG 13 were performed well under salt stress with exhibited lowest leaf injury score compared to the tolerant control varieties. BULASTOG also showed the highest percent of survival seedlings under salt stress. The second highest on percent of survival seedlings observed in KHAO TAH HAENG, and followed with CITANDANG. Cluster analysis was constructed based on leaf injury score, shoot length, root length, and percent of survival seedlings grouped the rice germplasms into three major groups. The tolerant control varieties, POKKALI I and POKKALI II were grouped in Group 2. BULASTONG and KHAO TAH HAENG were obviously closed to tolerant control varieties in the group. In conclusion, BULASTONG and KHAO TAH HAENG are the most promising rice germplasms under salinity condition, the germplasms can be recommended for further improvement program for salt tolerant in rice. In addition, shoot length, leaf injury score, and percent of survival seedlings should be emphasized during selection of salt tolerant genotypes of rice at seedling stage.
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