Genetic yield control in sugar beet hybrids obtained by diallel crosses

Purpose. The aim of our study was to determine the combination ability of the studied pollinators and identify the genetic control of the yield sign in interline diallel hybrids of sugar beet. Methods. The source material was homozygous as a result self-pollination. The combination ability and genetic control of quantitative traits were determined by the Hayman model. Results. Genetic analysis revealed that sugar beet pollinator line demonstrated genetic control of yield in diallel sugar beet hybrids by 14 genes and gene groups. Lines (BZ 1 and BZ 4) with high general combination ability demonstrated a significant additive effect of genes were selected. The effects of specific combination ability, which significantly affected the yield of heterosis hybrids, were revealed. Their share of influence was 36.4 and 23.8%, respectively. High-yielding hybrid combinations of parent genotypes were selected. They are transferred to reproduction and testing for ecological plasticity. Conclusions. Genetic control of the yield sign in diallel hybrids is found based on the Hаyman model. The influence of the combination ability of sugar beet pollinators was determined and the best parent genotype pairs were selected. According to the effects of specific gene interaction, the best combinations have been identified that can be used as sources of economically valuable traits.

Genetic diversity of Malus Mill. in the collection plantings of the Experimental pomology station named after L. P. Symyrenko

Gene pool of apple trees of the Experimental Station of Pomology named after L. P. Symyrenko IS of NAAS of Ukraine is supported in the “field gene bank” and has more than 1260 samples. The main task that gene banks solve is to preserve the genetic diversity of plants for present and future generations of people. As a result of attracting new samples to the collection and studying the imported introduced material, the selected sources of economically valuable traits are transferred for further inclusion in the selection programs of other research institutions. The genetic potential of apple productivity and resistance to biotic and abiotic environmental factors is far from exhausted.

The results of preliminary trial experimental hybrids of winter rapeseed bred at VNIIMK by economically valuable traits

The purpose of the research was a preliminary estimation of ten experimental hybrids of winter rapeseed (Brassica napus L.) bred in the V.S. Pustovoit All-Russian Research Institute of Oil Crops by the primary economically valuable traits. The research was conducted in the central zone of the Krasnodar region in 2019–2020. The results of the research are presented for the first time. On average for two years, nine of ten the best experimental hybrids increased by seeds yield by 0.32–0.76 t per ha both the standard cultivar Loris and the foreign hybrid Mercure. Middle seed yield of the studied hybrids varied significantly, variance range was from 4.99 t per ha (VN-3 × ОРK-10) to 5.62 t per ha (VN-4 × ОРK-20). Maximal values of seed and oil yields per a unit area were fixed for a hybrid combination VN-4 × ОРK-20. Except that, the hybrid is characterized with high weight of 1000 seeds (4.5 g). A hybrid combination VN-13 × ОРK-10 demonstrated high average by years seeds yield (5.33 t per ha) and oil yield (2.25 t per ha).Oil content in seeds and weight of 1000 seeds of this combination were at the level of the standard cultivar and the foreign hybrid. This hybrid shows the lowest glucosinolate content in seeds – 16.7 µmol/g, that is less that the foreign hybrid Mercure has by 2.3 µmol/g. The preliminary conclusion based on our researches is: the selected hybrids after confirmation of the competitive trial results can be of a great interest for production.

Influence of seed sowing rates on height, development and yield of the Russian varieties of oil-type sunflower in the Tashkent region of the Uzbekistan Republic

To obtain high yields of good quality of sunflower seeds, it is necessary to strictly observe scientifically justified cultivation technology, which combines techniques accounting both the biological features of the crop and the natural and climatic conditions of the region. But the role of varietal agricultural technology is also great, which takes into account the properties of a new variety and ensures the fullest realization of its productivity potential under these conditions. Research and development data are very important when introducing crops or varieties into new regions. In this regard, it became necessary to study and scientifically substantiate the optimal seed sowing rates of Russian sunflower varieties in irrigated conditions of the Uzbekistan Republic. The effect of seed sowing rates on the growth, development and yield of Russian oil sunflower varieties was studied in 2020– 2021 at the experimental station of the Tashkent State Agrarian University of Uzbekistan. The objects of the research were promising varieties Irtysh, Skormas (Russia) and the local variety Dilbar (Uzbekistan), which were cultivated at different seed sowing rates, providing a plant population of 40, 50, 60 and 70 thousand plants per ha. As a result of the studies, we found out, according to the complex of economically valuable traits, the best varieties of oil sunflower in the conditions of the Tashkent region are the middle maturing variety Dilbar of the local selection and the ultra-early maturing variety Skormas of the Russian selection, they formed the highest yield in the main crops on irrigation with a seed sowing rate of 50 thousand plant per ha – 4.35 and 4.09 t per ha, respectively. The Russian variety Irtysh is ultra-early maturing, the growing season is 86–88 days, it is less productive and can be considered as promising for repeated crops.

Herbicide resistant confectionary sunflower variety Aladdin

The variety Aladdin is the new confectionary sunflower variety. It is developed in the laboratory of OP-sunflower breeding jointly with the laboratory of genetic at the V.S. Pustovoit AllRussian Research Institute of Oil Crops in 2014– 2020. It is developed by crossing plants of a line VK 1-imi (Imr Imr) used as a maternal form and a pollen mixture of an early maturing confectionary sunflower variety, with the further treatment by the herbicide Euro-Lightning. Later, there were conducted a multiple individual selection and estimation in progenies of families that were the best by their morphometric and economically valuable traits, tolerance to broomrape races E, F, and G and to downy mildew. The variety belongs to the middle maturity group, confectionary type. The major features of the cultivar Aladdin are its resistance to imi-herbicides, high productivity, tolerance to the main races of broomrape and downy mildew, increased level of autofertility. The variety is suitable for cultivation by Clearfield (BASF) technology. It is uniformed by plants height, flowering and maturing. A period emergence – physiological maturity is equal to 97–99 days. Weight of 1000 seeds at plant population of 25–30 thousand plants/ha exceeds 130 g.

Adaptive reaction of perspective spring rapeseed cultivars in conditions of the central zone of the Krasnodar region

We studied 18 perspective and already registered spring rapeseed cultivars of VNIIMK breeding. Impact of weather conditions in a period flowering – maturing on economically valuable traits was revealed. The cultivars were compared by calculated statistic parameters of adaptivity, environmental plasticity, stability in the conditions of the central zone of the Krasnodar region. The perspective linear cultivars which demonstrated the most stably yield in the different years were selected. The researches were conducted in the V.S. Pustovoit All-Russian Research Institute of Oil Crops, Krasnodar, Russia, in 2017– 2020. The most favorable weather conditions for cultivation of spring rapeseed appeared to be in 2017. Index of environmental condition (Ij) was 1.01. On average for rapeseed cultivar, yield varied from maximal in 2017 (2.83 t per ha) to minimal in 2019 (1.31 t per ha). Oil content in the different years varied from 40.9 to 46.34%, weight of 1000 seeds – from 2.22 to 3.85 g. Glucosinolate content was minimal (14.16 µmol/g) in 2017 and reached maximum (21.48 µmol/g) in 2020. The linear cultivars ВН-LР13, ВНDl 2, and ВН-Dl 1 are characterized with the highest environmental plasticity, having the indicators bi = 1.30; 1.24, and 1.21, respectively. The cultivars Amulet and Ruyan were the most stable: Si² was equal to 0.65 and 0.69, respectively, as well as the main applicant for being a cultivar: ВН-4801, ВН-191, and ВН2478 having the indicators 0.40; 0.62, and 0.80. The perspective cultivars ВН-4801 and ВН-906 (Kenar) are characterized with a valuable combination of increased and stable for years yield. Due to absolute indicator of adaptability, all the studied cultivars are ranking as following: ВН-4801 (113.6%), ВН-Dl 1 (106.3%), ВН-Dl 2 (105.9%), ВН-LР 13 (105.0%), ВН-XT (103.4%), Руян (102.9%), and ВН-906 (101.9%).

The effect of a vegetation period on productivity, protein and oil percentage in grain of the collection soybean samples

The purpose of the current study was to identify the effect of the length of a vegetation period of the collection soybean samples on grain productivity and quality. The study was carried out in the southern part of the Rostov region in the fields of the FSBSI Agricultural Research Center “Donskoy” in 2018–2020. The climate is semi-arid with moderately hot summers. The soil is ordinary thick calcareous heavy loamy blackearth (chernozem). The forecrop was winter wheat. The objects of the study were collection soybean samples of the ARIGPR named after N.I. Vavilov. The study was carried out on 75 samples, including 52 middle early samples with 110-120 days of vegetation and 23 middle maturing samples (120-130 days of vegetation), differing in morphobiological and economically valuable traits. The analysis of a vegetation period, grain productivity and quality of the collection soybean samples has shown that in the southern part of the Rostov region the most variable trait was grain productivity (Cv = 22.5%). The less variable characteristics were protein percentage in grain (Cv = 3.8%), a vegetation period (Cv = 4.2%) and oil content in grain (Cv = 5.3%). There has been identified a positive effect of the length of a vegetation period of soybeans on grain productivity and oil content in grain for both groups of maturity, protein percentage in both groups of maturity having a negative dependence on a vegetation period. The study has shown that in the middle early group, the largest grain productivity was obtained with 117 and 118 days of vegetation, the highest protein percentage with 110 and 114 days of vegetation, and the largest oil content in grain with 118 and 120 days of vegetation. In the middle maturing group, the maximum productivity indicators were obtained for the samples with 126 and 130 days of vegetation, the maximum protein percentage with 122 days of vegetation and the maximum oil content in grain with 123 and 130 days of vegetation. The samples showing the maximum indicators will be included in further soybean breeding.

Features of the winter bread wheat varieties of unified type developed by the Agricultural Research Center “Donskoy”

The current paper has presented the characteristics of the new winter bread wheat varieties of unified type developed by the FSBSI Agricultural Research Center “Donskoy”. Winter wheat is the most valuable grain food crop grown in vast areas. Breeding plays an important role in increasing production volume and improving grain quality as the basis of the country’s food fund. Expanding grain crops area, among which wheat predominates, there is a problem of crop rotation. Therefore, the development of unified varieties capable of producing stable high grain yields after various forecrops is one of the most urgent areas of breeding work for winter bread wheat. The purpose of the current study was to characterize the new winter bread wheat varieties of unified type developed by the FSBSI Agricultural Research Center “Donskoy” according to the main economically valuable traits. Due to the intensive breeding work over the past decade, on the basis of some of the best zoned varieties ‘Ermak’, ‘Stanichnaya’, ‘Donskoy syurpriz’ there was developed a number of new promising genotypes, which are already being used in production sowings of winter wheat in the Rostov region and other regions of our country. The new winter bread wheat varieties of unified type ‘Lydia’, ‘Kapitan’, ‘Lilit’, ‘Krasa Dona’, ‘Volnitsa’, ‘Volny Don’, ‘Zhavoronok’ and ‘Polina’ are more productive than their parental forms. In combination with grain of high quality, resistance to bio and abiotic environmental factors, they are very valuable, beneficial for cultivation and improvement of the production of commercial wheat grain of high quality.

Formation features of the parameters of the model winter bread wheat variety of intensive type for the conditions of the Rostov region

Breeding success is determined by the correct choice of agro-ecotype. In this regard, we have carried out a comprehensive estimation of 75 winter bread wheat varieties and samples of the competitive trials. The variety ‘Ermak’ was used as a standard. The study was carried out using the material and technical base of the Federal State Budgetary Scientific Institution Agricultural Research Center “Donskoy” (FSBSI “ARC “Donskoy”) in 2017–2019. The purpose was to study the correlation among economically valuable traits of winter bread wheat varieties and samples and to find genotypes similar in their parameters to the model variety based on curvilinear regressions. As a result of the phenotypic estimation of the quantitative traits of winter bread wheat varieties and samples, there was determined an average level and their variability degree. Their productivity ranged from 8.52 to 10.51 t/ha. Through the years of study, the variation coefficients indicated a high stability of these features (from 0.9 to 10.0%). In order to identify the similarities and differences between varieties and samples, there has been conducted a cluster analysis. As a result of this analysis, there has been selected the winter bread wheat variety ‘Yubiley Dona’ (C25), parameters which were more identical to the model (C76). This variety is recommended for further breeding process to improve the studied basic economic traits.