Izvorni znanstveni članak
https://doi.org/10.5513/JCEA01/20.3.2231
Comparative evaluation of diploid and tetraploid red clover genotypes in a flat area of Northern Bulgaria
Galina Naydenova
; Experimental Station on Soybean, 61 “Ruski” Str., Pavlikeni 5200, Bulgaria
Viliana Vasileva
; Institute of Forage Crops, 89 "General Vladimir Vazov" Str., Pleven 5800, Bulgaria
Sažetak
From the first to third growing season in the field test carried out at the Experimental Station of Soybean (Pavlikeni, Bulgaria) was observed 12 genotypes of red clover, including two Bulgarian diploid varieties Nika 11 (standard) and Sofia 52, four local diploid populations and next six foreign tetraploid varieties, i.e. Kvarta, Astur, Carbo, Elanus, Fregata and Larus. The goal of study was to determine the effect of ploidity level of the varieties as well as the effect of adaptive variability of local populations on fresh mass yield, dry mass yields and their persistence in an agro-ecological area with lower summer moisture assurance for red clover. The highest total dry mass yield was observed for varieties Sofia 52 (2n), Nika 11 (2n), Kvarta (4n) and Astur (4n). The productivity of tetraploids Kvarta and Astur strongly varies depending on the season and the year, as well as the age of sward. According to the obtained comparative production data for cuts and years, the tetraploid germplasm has a stronger adaptation to the limiting moisture. In summer drought, typical for the plains of Northern Bulgaria, tetraploids stop growing and do not compensate for their limited vegetative growth, despite the excellent moisture guarantee in the late summer, as well as in the spring the next growing season. Local wild-type germplasm of the species is characterized by a rapid development and lower yield of fresh and dry forage mass compared to the diploid standard when growing in conditions of optimum moisture but relatively high productivity in the dry conditions of the summer months. The differences in the genotypic productivity response under dry conditions reported in this experiment also suggest that the abiotic limit studied can be successfully responded by the genotype factor.
Ključne riječi
diploid; drought; populations; red clover; tetraploid; variety; yield
Hrčak ID:
225154
URI
Datum izdavanja:
10.9.2019.
Posjeta: 1.469 *