Year: 2024
Type: article
Abstract: The studies aimed to assess the breeding value of parental lines and hybrid combinations for the creation of new varieties and hybrids of watermelon resistant to fusarium wilt. The work was carried out in 2016-2023 under dryland conditions of the Volgograd Region on a phytoplot located in a three-field crop rotation. The material for the studies was two sterile ms lines, 18 fertile mf lines and 22 hybrid combinations (HC) with their participation. The infectious background was created by introducing invasive material of the pathogen into the soil before sowing. Ranking into resistance groups was carried out in comparison with resistance standards based on the results of long-term records of disease development during the growing season. The intensity of fusarium development, depending on the meteorological conditions of the year, varied on average from 11 to 18%. Due to high ecological variability of the trait (Cvecol> 15%), the level of infestation in the group of resistant samples varied from 2 to 13% over the years, and in the group of susceptible samples – from 15 to 33%. Sterile lines L-12ms and L-1ms demonstrated high selection value as sources of resistance to fusarium. The share of relatively resistant and tolerant GCs based on them exceeded 70%, in the absence of susceptible ones. Resistance in GC is also determined by the level of resistance, combinatory and adaptive capacity of the paternal form and is not always inherited dominantly (-1.9<hp<2.2). Among the studied paternal mf lines, the relatively resistant L-Ikar and L-Novogodniy, as well as five mf lines from other resistance groups are of interest from this point of view. The yield of the best GCs with their participation in the control exceeded the standards by 0.4-6.1 t/ha and against the background of infection decreased by less than 20%, which is at the level of the resistance standard of the Bykovsky 22 variety.
Institution: Federal Scientific Center for Vegetable Growing
Language: English
Subfield: Genetics
Domain: Life Sciences
SDG: Zero hunger
Open Access status: hybrid
OpenAlex ID: W7203753097