|
|
:
|
Study of adaptation and resistance to Rhizoctonia root and crown rot in new sugar beet varieties Nine foreign sugar beet varieties along with three foreign resistant checks were evaluated for two years (2018-19) in naturally-infected areas [(Mashad (Torbat-e-Jaam, Miandoab, Hamedan and Qazvin)] in randomized complete block design with four replications. They were also tested in two replicates in Kermanshah microplots (artificial infection condition). In each of the four naturally-infected areas, the yield and quality traits were measured after harvest. In 2018 and 2019 trials of Mashad, the varieties B8128, TRIVOR and URSELINA and in 2018 and 2019 trials of Hamedan, the varieties B8128, TRIVOR, TEXELL and URSELINA displayed signinficant superiority to the mean of resistant checks for white sugar yield. In the microplot experiment of Kermanshah, the varieties B8128, TRIVOR, TEXELL and URSELINA showed less infection than the mean of the resistant checks (1.38). Study of white sugar yield stability of the varieties over two years and four locations showed that the varieties B8128 and URSELINA were more stable than the other varieties as well as the resistant checks and could be recommended for cultivation in Mashad, Miandoab and Hamedan.Keywords: varieties, sugar beet, resistance, rhizoctonia
|