期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2012
卷号：3
期号：5
页码：967-982
出版社：University of Mohammed Premier Oujda
摘要：The study was conducted at Experimental Field Block of Genetics Department, Hazara University Garden Campus during 2008-11. The field conditions, as well as data on various plants' parameters (i.e. for each genotype) were recorded at different stages of the plants' development. Two wild species i.e. O. longistaminata and O. rufipogon, having 62 genotypes each) and four cultivated varieties of rice of Pakistan were evaluated on the basis of various morphological traits in experimental fields, having randomize complete block design. The data of 3 cultivated rice could not be presented here due to its non availability & because of non synchronization with 2 wild sp. However there was a significant variation for all the traits studied among the selected genotypes as well as both the wild species. Both the morphological traits and the mean values showed significant variation among each other. O. longistaminata was found not suitable due to its late booting and flowering (occurring in November-December) which does not coincide with that of the local cultivars. Again the at that time is close to freezing point. The maturity period of the local cultivars is shorter than O. longistaminata . Besides other morphological traits, the weigh of 100 grains was observed to be 4.50 grams in G-58 followed by 4grams in G-5. Dendrogram of 62 genotype showed similar results among each other in all the morphological traits. The mean square values of morphological traits correlated significantly in percent sterility 328.576, percent fertility 319.121, and 100 grams of seed weight 1.11788. Inheritance of botanical traits in rice (O. sativa x O.rufipogon F1 and F2 showed 89cm and 83.38cm for plant height, where as the leaf length were at par (38 cm). Differences were observed among spikelets panicle of 113 and 129 while pollen sterility were also 78 and 28 respectively. The twenty selected genotypes on the basis of yield parameters were further evaluated for seed quality through measurements. All the seed traits studied also showed significant variation amongst the genotypes. The seed length and seed width showed maximum variation (88%) with respect to other seed traits. The derived information would be very useful for selecting suitable breeding program
