Variability of some phenotype and biochemical propreties on domestic genotype rice (oryza sativa l.)

In the following research variability of some phenotypes and biochemical characteristics on thirteen domestic genotypes of rice (Oryza sativa L.) were analyzed, out of which ten are recognized as cultivars. Those are: kochanski, broj 51, osogovka, prima riska, biser-2, broj 69, montessa, nada-115, ranka and B-30-303) as well as the lines of special interest 79/22-2, 78/12-3-4 and 78/12-3-5. Several phenotype characteristics were analyzed such are stem height, leaf length and width, length of main panicle, number of grains in the main panicle, weigh of the grains of main panicle, weight of 100 grains and length and width of the grain. Main panicle fertility percent was calculated based on the grain number in the main panicle and the number of non-fertilized (sterile) flowers, leaf’s length and width was used for calculation of its leaf area while the grain’s shape was determined by the ratio of its length and width. Several biochemical characteristics were analyzed such are content of soluble carbohydrates, content of total and protein nitrogen and content of trace elements (iron, zink and copper) in paddy rice, cargo and white rice. Standard characterization and evaluation system for rice was implemented during research activities, according to the descriptors listed in Biodiversity international, IRRI and WARDA, 2007; IBPGR and IRRI, 1980. The average values of the tested characteristics and SPSS software were used for determination of the descriptive statistics elements. Obtained results were processed by analysis of variance and tested with LSD test. Highest variance coefficient was recorded on weight of the grains from the main panicle and the number of grains in the main panicle respectively. On the other hand lowest variance coefficient -2,67% was recorded on fertility. As far as tested characteristics is concerned, considerable diversity was determined between tested genotypes. Correlation coefficient was used for determination of mutual dependence on phenotype and biochemical characteristics respectively. Significant positive correlation was determined between the numbers of grains in the main panicle and the weight of the grains in the main panicle (rg=0,887). On the side of biochemical characteristics, in the paddy category significant negative correlation is recorded for proteins and Iron (rg= 0,823); in cargo category for proteins and copper (rg= 0,549). In the category white rice, significant positive correlation was recorded for the iron and copper (rg= 0,883) and iron and zink (rg= 0,703). Based on conducted characterization and evaluation of the tested genotypes, broadening of basic genotype was perfomed.