The present study was conducted at the Breeding field of Sugar Crops Research Institute, Agriculture Research Center (ARC), Giza, Egypt,during 2018/2019 and 2019/2020 seasons to evaluate the potential of ten hybrids along with the check cultivar (GT54/9)and detect the elite ones. The experiment design was randomized complete block with three replications. The mean and range for stalk height, stalk diameter, number of stalk/stool, stalk weight, stool weight and Brix of each hybrid were recorded. In addition to, among and within hybrids variation i.e.genotypic and phenotypic variances;genotypic (GCV) and phenotypic coefficient of variation(PCV); heritability and genetic advance were estimated.
The results illustrated significant differences among hybrids as well as families within hybrids, revealingdifferent genetic make-up for the obtained hybrids and their families.
Moreover,the results indicated that applying selection among evaluated hybrids would more effective than applying selection within hybrids and suggesting the selection among hybrids followed by selection within elite selected hybrids would increase selection efficiency.
According the high values and the high variation for studied traits, the results showed that , hybrids i.e.CP.63-35 X CP.46-115,CP.57-614 x Co. 617, Co.1129 x G.73-211, Co.744 X Bo.19, CP.67-412 x G.73-211and H.86-37 X Co.617 were the best to improve stalk diameter. Moreover hybridsi.e. Co.744 X Bo.19 , CP.67-412 X G.73-211 and H.86-37 X Co.617 proved to be elite hybrids for improving stalk weight . hybridi.e.CP.63-35 XCP.46-115 proved to be the best to improve stalk number and stool weight.