Tocopherols are antioxidants that preserve oil lipids against oxidation and serve as a natural source of vitamin E in the human diet. Compared with other major oilseeds like rapeseed and soybean, sunflower (Helianthus annuus L.) exhibits low phenotypic diversity of tocopherol composition, both in wild and cultivated accessions from germplasm collections. Two major mutations that alter tocopherol composition were identified in genetic collections, and several studies suggested additional loci controlling tocopherol composition, with their expression possibly depending on the genetic background. In the present study, we performed QTL mapping of tocopherol composition in two independent F2 crosses between lines with contrasting tocopherol composition from the Pustovoit All-Russia Research Institute of Oil Crops (VNIIMK) collection. We used genotyping-by-sequencing (GBS) to construct single nucleotide polymorphism (SNP) based genetic maps, and performed QTL mapping using quantitative and qualitative encoding for phenotypic traits. Our results support the notion that the tocopherol composition in the assessed crosses is controlled by two loci. We additionally selected and validated two SNP markers for each cross which could be used for marker assisted selection.
This article presents the results of studying the development and formation peculiarities of the number of dominant phytophages of winter oilseed rape: cruciferous fleas (Phyllotreta undulata), rape pollinator (Athalia rosae L.), rapeseed flower beetle (Meligethes aeneus F.), seed larvae (Ceuthorrhynchus assimilis Payk.), cabbage capsicum mosquito (Dasyneura brassicae Winn.), cabbage aphid (Brevicoryne brassicae L.). Theoretical generalization of the prevalence of pests in the research area and the impact on the formation of winter rape yields. The influence of modern insecticides on the control of the number of dangerous pests of winter rape and on the yield, biometric parameters of rape plants has been studied. The best results in controlling the number of dominant phytophages in the enterprise showed the drug Nuredin ™ Super KE (chlorpyrifos 400 g / l + bifenthrin 20 g / l) at a rate of 0,75 l / ha. On the basis of the obtained data it is recommended to use the drug Plenum 50 VG (pimetrosine 500 g / kg) at a rate of 0,25 l / ha, as its use provides rapeseed yield at 24,3 c / ha and gives a good economic effect, due to higher yields, the profitability of growing crops is 62,8%, which is 26,3% more than the control option for improving the control over a number of pests. Having researched the phytosanitary condition of winter rapeseed crops, it has been found that the most common diseases of rapeseed were alternaria, phomosis, gray and white rot, and cylindrosporiosis.The results of treatment of winter rape plants with new fungicides to protect against the main common pathogens: alternaria (Alternaria brassicicola Wilts), phomosis (Phoma lingam Desm.), cylindrosporiosis (Cylindrosporium concentrium Grev) are presented. Conclusions are made on the effectiveness of the new generation of fungicides in limiting the spread of diseases. To control the spread of diseases in the agrophytocenosis of rapeseed, it is advisable to use the drug Architect SE (pyraclostrobin 100 g / l + calcium prohexadione 25 g / l + mepiquat chloride 150 g / l) at a rate of 2.0 l / ha, which significantly reduced the damage of winter rapeseed major diseases and had a therapeutic effect, while providing yield at the level of 26,1 c/ha and profitability within 63,1%, which is 26,6% higher than the control option. Therefore, the use of an integrated pest management system can significantly increase the efficiency of cultivation technology and minimize crop losses.
This article presents the results of studies of the effectiveness of the use of biological products in winter wheat crops. The positive effect of pre-sowing seed inoculation with biological products Azotofit and Help Growth on the germination capacity of winter wheat seeds of the Skagen variety has been established which was 3-4% higher than the control and contributed to an increase in the number of nodal roots by 56% and 50%, respectively, the plant density was 13-9 pcs / m2 more than in the control. In the variants Azotofit and Help Growth, productive tillering was higher by 0.3-0.2 stems / plant. compared with the control, and the infestation of plants by root rot was 6.6-4.7%, respectively. It was established that an increase in winter hardiness as a result of pre-sowing inoculation of winter wheat seeds, which was 93.2-94.5%, respectively, which was 2.7-4% higher than the control indicator and overwintering of plants, which was 546-521 pcs / m2, which 111-85 pieces / m2 more compared to the control. The combination of pre-sowing inoculation with biological products Azotofit, Help Growth and feeding with Organic Balance (during spring tillering) had a positive effect on the bushiness of plants and their productivity, which, in the variant providing for pre-sowing inoculation of seeds with the biological product Azotofit and feeding with Organic Balance, was 580 which is 102 pcs / m2 higher than the control indicator. The use of the studied preparations contributed to the better spring tillering of winter wheat plants and the number of productive stems, in particular, the combination of pre-sowing inoculation, respectively, with the biological products Azotofit and Help. Growth and feeding Organic balance (during the spring tillering period), the number of productive stems is 535-540 pcs / m2, which is 112-117 pcs / m2 more than in the control. The use of the studied biological products had a positive effect on the elements of the structure of the crop, in particular, an increase in the number of grains per spike, the mass of grain per spike and the mass of 1000 grains was noted, which ultimately contributed to obtaining the highest yield of winter wheat, which in the application of Azotofit and Help Growth was 5.64-5.82 t / ha, respectively, which is 0.48-0.66 t / ha more than in the control. When feeding in the tillering phase with Organic, the yield balance was 5.63 t / ha, which is 0.47 t / ha higher than in the control. With a combination of presowing inoculation, respectively, with the biological products Azotofit and Help Growth and feeding Organic balance (during the spring tillering period), the yield was 6.21-6.38 g, which is 1.09-1.22 t / ha more than in the control.
There is a demand in the food industry for natural solid vegetable oils. The use of sunflower oil with a high content of stearic acid prevents its hydrogenation in the manufacture of food products. The development of new lines of sunflower (Helianthus annuus L.) with an increased content of stearic acid may increase the demand for sunflower oil, a useful analogue of solid vegetable oils for special food purposes. We identified two inbred lines with a high content of stearic and oleic acids from a source with a high content of these acids, one of which, I5HSHO-1, is one-headed, the other, I5HSHO-2v, is many-branched, as well as two one-headed lines with high content of stearic acid on the linoleic background (I5HSLO-1, I5HSLO-2).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.