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Evaluation of sugarcane clones is an important step to choose selection criteria for improvement of cane yield. This study was carried at Kom-Ombo Agric. Res., Station, Aswan governorate, ARC, Egypt to study the performance, phenotypic correlation and path-coefficient analysis of some sugarcane clones. Twenty four clones of sugarcane along with their parents and the check variety (G-T-54-9) were investigated in a Randomized Complete Block Design with three replicates for the two years; 2018/2019 and 2019/2020. In each season and over seasons, the differences were highly significant among clones for all the studied traits; stalk length, stalk diameter, cane yield, brix, sucrose, purity, sugar recovery and sugar yield. In addition, mean squares due to years and years × clones interactions were significant (p˂0.01) for all the studied traits, except brix. The combined mean demonstrated that the clone No. 281 produced the highest cane yield and sugar yield compared to the check variety (G-T-54-9). This clone is promising and could be take steps as new sugarcane clone for Upper Egypt based on cane yield and sugar yield. All studied traits were high in broad sense heritability except sucrose percent was moderate. Cane yield recorded positive correlation with stalk length, stalk diameter and sugar yield, and it was negative with the other traits under study. Path analysis exhibited that sugar yield and brix were the two important traits for cane yield improvement.

Eleven genotypes of sugarcane (ten genotypes and one commercial variety G.T.54-9 as a control) were evaluated at twelve environments; three locations (Agric. Res. Stations of Kom-Ombo, Aswan governorate, El-Mataana, Luxor governorate and Shandaweel, Sohag governorate and two harvesting dates; 11 and 12 month-old in 2015/2016 (plant-cane) and 2016/2017 (first-ratoon).The differences among genotypes, locations and between harvesting dates were significant for all studied traits; stalk length, stalk weight, cane yield, brix, sucrose and sugar yield. The interaction of locations × genotypes was highly significant in plant-cane and first-ratoon for all studied traits. Locations × harvesting dates interaction was significantly for stalk length in plant-cane crop and for stalk weight, sucrose and sugar yield in first-ratoon crop. Mean squares due to interaction between genotypes, harvesting dates and locations were significantly for all studied traits, except cane and sugar yields in plant-crop and stalk length in first-ratoon. Mean cane yield ranged from 54.23 and 52.61 to 57.61 and 56.71t/fed at harvesting dates and from 46.66 and 50.12 to 60.71 and 58.69 t/fed under locations in plant-cane and first-ratoon, respectively. Late harvesting date increased cane yield and its components. The stability analysis of variance for cane yield showed that the intermediate yielding genotypes (G.2003-47, G.2004-27 and G.2011-82) were more stable than the rather responsive high yielding ones. However, the genotype G. 2004-27 was stable for cane yield and its components. In addition, it was considered to be superior for cane yield under different environments. However, the highest yielding genotype (G.99-103) was unstable.

C. Tomas, J.J. Sanchez, A. Barbaro, C. Brandt-Casadevall, A. Hernandez, B.D. Mohamed, M.M. Ramon, N. Morling Section of Forensic Genetics, Department of Forensic Medicine, Faculty of Health Sciences, University of Copenhagen, 11 Frederik V's Vej, DK-2100 Copenhagen, Denmark Instituto Nacional de Toxicologia y Ciencias Forenses, Delegacion de Canarias, Tenerife, Spain Sezione di Genetica Forense, Studio Indagini Mediche E Forensi (SIMEF), Reggio Calabria, Italy Institut Universitaire de Medecine Legale, Lausanne, Switzerland Service de Medecine Legale, Hopital Farhat Hached, Sousse, Tunisia Institut Universitari d’Investigacions en Ciencies de la Salut i Laboratori de Genetica, Departament de Biologia, Universitat de les Illes Balears, Palma de Mallorca, Spain