부산대학교 도서관

The objectives of the current study were to identify the genetic material, which is characterized by a high growth rate and maximum root system size; to study the variability of Russian and foreign rice varieties for the markers associated with the genes, which determine efficient phosphorus utilization; to assess the possibility of using the simple sequence repeat (SSR) markers discussed in the current work for the introgression of the previously mapped genes; and to subdivide the donor samples identified in the Russian gene pool into groups characterized by a high probability of resistance development via different genetic mechanisms. The features which determine the intensity of the phosphorus uptake and their inheritance in rice varieties are discussed. We have studied the variability of the 72 rice varieties of Russian and foreign origin for the development rate of the root system and its size at maturity. The highest development rate of the root system was observed for the following varieties: Liman, Arborio, Dalnevostochnyi, Selenio, Oceano, Atlant, Musa, Fontan, Cerere, Sharm, Serpentine, Khankaiskii 52, Leader, Boyarin, and Druzhnyi. The samples of Russian origin were characterized by a higher growth rate than the Italian ones. The root weight at the stage of maturation varied from 1.5 to 4.5 g in different rice varieties, the maximum root weight being observed in the following varieties: Carnise, Rapan, Onix, and G-57. The root length varied from 17 to 26 cm with the highest length being displayed by the D 25-2, G 75-5, Ryzhik, G-52, Krepysh, and Snezhinka varieties. The variability observed in the Russian and foreign varieties for all the examined SSR loci associated with the genes controlling the phosphorus uptake showed that marker assistant selection may be carried out for this feature in the gene pool under study. The maximum allele number was detected for the RM 247 marker, localized on chromosome 12.