Abstract
Rapeseed (Brassica napus L. ssp. oleifera Metzg) is attacked by a wide range of pests. Breeding of resistant cultivars is one of the best methods of protecting crops against insects, and non-cultivated species of Brassicaceae can be used as resistance donors. In this study, we investigated the relationship between nutrient content and resistance to two commonly occurring pests (Delia radicum and Brevicoryne brassicae) in 12 Brassicaceae hybrid combinations. The experiment was conducted at Poznań University of Life Sciences Experimental Station located in Dłoń. The assessment was carried out for three years (2017, 2018, and 2019) on randomly chosen individuals in two growth stages: vegetative stage and flowering stage. The resistance to B. brassicae and D. radicum was observed in all three years, however, macronutrient and micronutrient contents as well as total nitrogen, total sulfur, and sulfur sulfate were observed only in 2019. Statistically significant negative association between Ca and resistance to B. brassicae and D. radicum was discovered. Additionally, positive association between Cu and resistance to B. brassicae was observed. The importance of selected mineral elements in plant resistance is widely discussed.
Highlights
Rapeseed (Brassica napus L. ssp. oleifera Metzg) is a major crop plant and one of the most important oil sources in the world [1,2]
The results of the Multivariate analysis of variance (MANOVA) performed indicated that all the hybrids (F11;48 = 64.99; p < 0.0001), growth stages (F1;48 = 3112.04; p < 0.0001), and hybrid × growth stage interaction (F11;48 = 45.84; p < 0.0001) were significantly different with regard to all of the 13 quantitative mineral elements
Analysis of variance indicated that the main effects of hybrids as well as hybrid × growth stage interaction were significant for all the nutrients of study (Table 2)
Summary
Rapeseed (Brassica napus L. ssp. oleifera Metzg) is a major crop plant and one of the most important oil sources in the world [1,2]. Oleifera Metzg) is a major crop plant and one of the most important oil sources in the world [1,2]. Rapeseed growers face numerous problems that limit plant productivity, quality, and seed yield such as climate changes affecting the growth condition or increased pest infestation [3]. (Homoptera: Aphididae) and cabbage root fly (Delia radicum L.) (Diptera: Anthomyiidae) are economically important pests in many regions of the world including Poland. Larvae of D. radicum damage rapeseed plants by chewing mines in the roots, occasionally penetrating the stem and the head of the plant. Larvae feeding results in delayed growth, wilting, and stunting. Heavy infestation may result in reduced seed number or even plant death [5]
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