The present investigation was executed at two locations (El-Arish & (Rafah), Suez Canal University during rain-fed growing season (2006 / 2007) on screened ten bread wheat genotypes. Mean squares and some genetic parameters for the investigated characters are discussed. Grain yield was positively and significantly correlated with each of No. of spikes / plant under Arish conditions and 1000 grain weight as well as biological yield at both Arish and Rafah locations?. The main source (direct effects) of plant grain yield variation estimated under Arish conditions is 1000 grain weight followed by number of spikes / plant, number of grains /spike and biological yield. Estimates of characters responsible for variation in order of relative importance were: number of spikes/plant (12.2%), No.of grains/spike (13.3%), 1000 grain weight (50.7%) and biological yield (17.5%) under Arish conditions while it could be arranged in descending order as 1000 grain weight (51.9%), number of grains / spike (45.5%), Number of spikelets / spike (1.4%) at Rafah environment.

Acacia tortilis (subsp. raddiana) Trees are very important in Qatar. The trees play an important role as a source for animals feed and for environmental enhancement by combating desertification and firewood. This study was carried out in the Genetic Resources Department, Biotechnology Center, Ministry of Environment, Qatar and Egyptian Deserts Gene Bank, Egypt. The aim of the study was to enhance the response of Acacia tortilis subspecies tortilis seeds when exposed to some chemical and physical treatments, such as mechanical scarification, chemical scarification, GA3 (Gibberellic acid), dry heat treatment, Potassium nitrate (KNO3) in solutions of water, sulphuric acid (H2SO4), hydrogen peroxide (H2O2), tap water and boiling water--all intended to increase germination percentage. The obtained results revealed significant differences in the germination percentage of Acacia tortilis seeds exposed to different dormancy treatments. The highest germination percentage was 76 % achieved with boiling water treatment. Treating seeds with 98% concentrated sulphuric acid for periods of 10, 20, 25 and 30 minutes enhanced germination percentage by 33%, 67%, 70%, 75%, respectively. The lowest germination percentage was seen in untreated seeds, 25%.