This study was carried out in two successive summer seasons (2012 and 2013), at the Experimental Farm of Research Station, Qanater El-Khairya, El-Kalupia Governorate, Agriculture Research Center. The main objectives of this investigation were to estimate of magnitude of additive and non-additive gene effects for some traits in an attempt to stablish some inbred lines. The study also aimed to estimate heterosis degree, relative to mid, better parents and the standard cultivar to determine the hybrid vigour for some important characters. Phenotypic correlation coefficients between all possible pairs of the different studied traits were estimated. The following traits were assessed: early and total yield as fruit number and weight, average fruit weight, shape index, skin and flesh colour, flesh thickness, β carotene, vitamin C and sugars contents. The obtained results showed that both additive and non-additive gene effects were involved, the additive gene effects appeared to be playing the main role in the inheritance of all studied traits, since the estimated GCA: SCA ratio values ranged from 4.4 to 57.8. None of the parents found to be good combiner for all characters. Generally the two parents Magyar Kincs and Muszkotàly were the best combiner for breeding to most characters. It is noticed that the best 1 F combinations were resulted from crossing between these two parents or between one of them and other parent.Hybrid vigour was detected for early and total yield, as well as, most fruit characters. In some crosses, high better parent heterosis and potence ratio values were given for these traits supporting the over dominance hypothesis. Other degrees of dominance were observed by many crosses concerning some traits. High estimated standard heterosis were reflected by three crosses i.e., Shahd El-Dokki X Muszkotàly, Shahd El-Dokki X Magyar Kincs and Magyar Kincs X Muszkotàly for yield and most important traits. Hence, it could be suggested that these crosses may be recommended as new promising 1 F hybrids for commercial production of melon after further evaluation. Desirable correlations were detected between many pairs of character. In many cases phenotypic correlations used to help breeders in selecting and improving quantitative of difficulty measured characters through the selection for simply and correlated ones.

This study was carried out at the Barrage Horticulture Research Station, Qaluobia Governorate, and the Strawberry Improvement Center, Faculty of Agric., Ain Shams Univ. during the period from 2005 to 2009. The aim of this study was to produce and selected some local promising strawberry hybrids from the commercial cultivars through the traditional crossing method. Four potential cultivars i.e., Sweet Charlie, Diamonte, Camarosa and Vantana were used in the crossing and six hybrids were chosen and evaluated in the nursery stage and also for yield and fruit quality in two seasons. The study aimed also to determine the average degree of heterosis (ADH) regarding some horticultural characters viz., yield component, and fruit physical and chemical characteristic for the obtained hybrids. This knowledge about this sort of genetics would be helpful to the plant breeder for planning a successful breeding program. Results revealed that hybrid K102 (Kanater 102) exhibited the highest values in total yield, average fruit weight, fruit firmness and total soluble solids content as compared with its parents suggesting hybrid vigor for these traits. Hybrid K101 showed the highest values of average fruit weight, total soluble solids, ascorbic acid content and the lowest total acidity as compared with the parents. Also, K105 gave the highest values of number of fresh and dormant transplants and the lowest values of total acidity. Results indicate also that K 106 showed the highest values of total plant yield and average fruit weight as compared with the parental cultivars. Hybrids, K103 and K107 showed the highest values in fruit firmness and average fruit weight respectively as compared with the parents. Also, Sweet Charlie and Camarosa parents were the highest in early yield per plant and average fruit weight respectively. In general, the results on heterosis showed that most produced hybrids exhibited higher values than the better parent concerning most studied traits. The observed hybrid vigor for these traits encourages the production of F1 hybrids in strawberry for commercial production. The study concludes that six new local strawberry hybrids have been produced with high productivity and desirable eating quality than their parents.