scholarly journals Population studies of causative agent of wheat yellow rust in the Northwest Russia

2020 ◽  
Vol 23 ◽  
pp. 01006
Author(s):  
Ekaterina L. Shaydayuk ◽  
Elena I. Gultyaeva
Keyword(s):  
Durum Wheat ◽  
Common Wheat ◽  
Causative Agent ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Resistance Breeding ◽  
Racial Composition ◽  
Leningrad Region ◽  
North West ◽  
The North

Wheat yellow rust (causative agent Puccinia striiformis West.) is a widespread disease of common wheat in the North-West Russia. A comparative analysis of P. striiformis populations, collected in the Leningrad region in 2019 on wheat and triticale, by virulence and racial composition was carried out for the first time. Virulence and racial composition of P. striiformis were studied using international and European sets of differentiating varieties and isogenic lines of “Avocet” with 20 Yr genes. A total of 55 single-pustule isolates of P. striiformis were studied, including 31 from common wheat, 10 from durum wheat and 14 from triticale. Using differentiating varieties, 2 races (111E247, 110E247) were identified among isolates from common wheat, 3 races from durum wheat (111E213, 111E231, 111E247), and 5 races from triticale (111E247, 78E209, 79E209, 111E231, 78E215). Using “Avocet” isogenic Yr lines, all isolates were avirulent to lines with the Yr5, Yr10, Yr11, Yr12, Yr15, Yr24, Yr26 genes and virulent to Yr6, Yr7, Yr8, Yr9, Yr18, YrSp, YrJr(18), YrAS genes. Isolates virulent to Yr17 were revealed on triticale; avirulent to YrSk (27) – on durum wheat. and avirulent to YrAR – on triticale. Highly effective Yr genes can be recommended for wheat resistance breeding to to yellow rust.

United Front: Partisans of the Leningrad Region and their connections with the Central Asian Soviet Republics

2021 ◽  
Vol 2021 (02) ◽  
pp. 214-225
Author(s):  
Sergey Kulik ◽  
Аnatoliy Kashevarov ◽  
Zamira Ishankhodjaeva
Keyword(s):  
World War Ii ◽  
Weather Conditions ◽  
Leningrad Region ◽  
World War ◽  
North West ◽  
The North ◽  
Occupied Territory ◽  
Central Asian ◽  
The Difference ◽  
Almost All

During World War II, representatives of almost all the Soviet Republics fought in partisan detachments in the occupied territory of the Leningrad Region. Among them were many representatives of the Central Asian republics: Kazakhstan, Kyrgyzstan and Uzbekistan. Many Leningrad citizens, including relatives of partisans, had been evacuated to Central Asia by that time. However, representatives of Asian workers’ collectives came to meet with the partisans. The huge distance, the difference in cultures and even completely different weather conditions did not become an obstacle to those patriots-Turkestanis who joined the resistance forces in the North-West of Russia.

Analyses of Wheat Yellow Rust Populations Reveal Sexual Recombination and Seasonal Migration Pattern of Puccinia striiformis f. sp. tritici in Gangu, Northwestern China

2021 ◽  
Author(s):  
Miaomiao Huang ◽  
Taiguo Liu ◽  
Shiqin Cao ◽  
Jonathan Yuen ◽  
Jiasui Zhan ◽  
...  
Keyword(s):  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Random Mating ◽  
Migration Pattern ◽  
Seasonal Migration ◽  
Northwestern China ◽  
Mountain Regions ◽  
Lower Altitude ◽  
The North ◽  
North And South

Puccinia striiformis f. sp. tritici is the causal agent of wheat yellow rust with records of regular and severe epidemics in China. This study explored the population dynamics of the yellow rust pathogen in Gangu, northwestern China. In Gangu, the Weihe River runs from west to east and divides Gangu into three regions: North and South mountain, with the valley in between. To study the genetic structure of the pathogen in local populations, samples were collected over 3 years from the three regions at different altitudes both within and between the wheat cropping seasons. A total of 811 P. striiformis f. sp. tritici isolates were successfully genotyped using 16 simple sequence repeat markers. The results suggest that P. striiformis f. sp. tritici can survive year-round in Gangu. The P. striiformis f. sp. tritici populations migrated among the regions, and the migration pattern was not related to altitude. The oversummering populations in the North and South mountain regions were genetically different from each other; and the P. striiformis f. sp. tritici populations collected from the lower altitude in the valley had no relationship with any of the populations collected in the spring or fall, indicating that they too have a different origin. Signatures of random mating were found in the populations collected in both North and South mountain regions, but not in the valley populations.

scholarly journals Whole genome resequencing and comparative genome analysis of three Puccinia striiformis f. sp. tritici pathotypes prevalent in India

2021 ◽  
Author(s):  
Inderjit Singh Yadav ◽  
S. C. Bhardwaj ◽  
Jaspal Kaur ◽  
Deepak Singla ◽  
Satinder Kaur ◽  
...  
Keyword(s):  
Phylogenetic Analysis ◽  
Stripe Rust ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Strong Association ◽  
Rapid Evolution ◽  
Whole Genome ◽  
Rust Disease ◽  
The North ◽  
Whole Genome Resequencing

Stripe rust disease of wheat, caused by Puccinia striiformis f. sp. tritici, ( Pst ) is one of the most serious diseases of wheat worldwide. In India, virulent stripe rust races have been constantly evolving in the North-Western Plains Zone leading to the failure of some of the most widely grown resistant varieties in the region. With the goal of studying the recent evolution of virulent races in this region, we conducted whole-genome sequencing of three prevalent Indian Pst pathotypes Pst46S119, Pst78S84 and Pst110S119. We assembled 58.62, 58.33 and 55.78 Mb of Pst110S119, Pst46S119 and Pst78S84 genome, respectively. Pathotypes were found to be highly heterozygous. Comparative phylogenetic analysis indicated the recent evolution of pathotypes Pst110S119 and Pst78S84 from Pst46S119. Pathogenicity-related genes classes (CAZyme, proteases, effectors, and secretome proteins) were identified and found to be under positive selection. Higher rate of gene family expansion was also observed in the three pathotypes. A strong association between the effector genes and transposable elements may be the source of the rapid evolution of these strains. Phylogenetic analysis differentiated the Indian races in this study from other known US, European, African and Asian races. Diagnostic markers developed for the identification of different Pst pathotypes will help tracking of yellow rust at farmers’ field and strategizing resistance gene deployment.

scholarly journals Foliar fungicide application as management strategie to minimize the growing threat of yellow rust on wheat in Portugal

2018 ◽  
pp. 715
Author(s):  
Conceição Gomes, Ana Sofia Almeida, José Coutinho, Rita Costa, Nuno Pinheiro ◽  
João Coco, Armindo Costa, Ana Sofia Bagulho and Benvindo Maçãs
Keyword(s):  
Durum Wheat ◽  
Field Experiments ◽  
Escape Behavior ◽  
Puccinia Striiformis ◽  
Yellow Rust ◽  
Wheat Yield ◽  
Genetic Resistance ◽  
Kernel Weight ◽  
Wheat Varieties ◽  
Fungicide Application

Yellow rust caused by Puccinia striiformis f. sp. tritici, is a foliar wheat disease that cause significant yield losses in Portuguese bread and durum wheat yield, mainly in recent years. The strategies to disease control include cultural practices (crop rotation, use of balanced fertilizers, framework of planting dates), use of resistant varieties and fungicide application. The concern of modern plant breeding has been the improvement of new varieties with escape behavior to diseases and/or genetic resistance, but currently, the use of chemical produts offers a pratical and rapid response solution to combat rust outbreaks. In the present study, field experiments were conducted from 2013/2014 to 2016/2017 growing seasons to evaluate: 1) resistance levels against yellow rust in some bread and durum wheat varieties widely used by Portuguese farmers; 2) the opportunity of application of fungicide in the control of Puccinia striiformis in two stages of plant development; 3) gains obtained in each situation in yield and thousand kernel weight (TKW) compared to the control without fungicide application. This study allows to conclude that the need to use fungicide sprays it´s related not only on the carry over of rust inoculum in crop, but also of the races/strains of P. striiformis occurring in a region, the crop growth stage at time of symptom appearance and on variety level of resistance.

scholarly journals Improving the efficiency of early table beet cultivation in the North-West region of Russia

2020 ◽  
Vol 210 ◽  
pp. 05012
Author(s):  
Nikolay Romanovskiy ◽  
Aleksandr Sergeyev ◽  
Eduard Papushin ◽  
Ivan Irkov ◽  
Alexey Bykov
Keyword(s):  
Fold Increase ◽  
Weather Conditions ◽  
Leningrad Region ◽  
North West ◽  
The North ◽  
Root Crops ◽  
West Region ◽  
Cultivation Technology ◽  
The One ◽  
Cultivation Techniques

The appearance of the first marketable root crops with a diameter of more than 50 mm, categorized as elite, in the North-West region of the Russian Federation, may already occur by the end of the third decade of June. The crop price during this period is at least twice the one during mass harvesting. The price depends on the product’s presence on the consumer’s market as well as on weather conditions in the regions of traditional suppliers. In some years, the price can differ by a factor of 3-4. By the time of mass harvesting using traditional technology, the number of elite root crops does not exceed 50%. In order to assess the effectiveness of the proposed early beets cultivation technology, the studies were carried out in the economic conditions of the farm, Leningrad region on the area of 3 hectares. According to the research results, the proposed technology allows to reach 3.3-fold increase of the root crops yield, which are to be sold fresh through the retail network, compared to the traditional one. The gross income using the proposed technology, calculated for sales prices of 2019, amounted to 384.6 thousand rub/ha against 125.2 thousand rub/ha using traditional cultivation techniques.

scholarly journals The spatiotemporal characteristics of the distribution of radiation frosts over the territory of the North-West region of Russia

2018 ◽  
Vol 3 ◽  
pp. 36-41
Author(s):  
Kononenko O.V.
Keyword(s):  
Crop Production ◽  
Limiting Factor ◽  
Leningrad Region ◽  
Agricultural Crop ◽  
Weather Station ◽  
North West ◽  
The North ◽  
West Region ◽  
Pskov Region ◽  
Weather Stations

To plan agrotechnical measures in changing climate it is necessary to track the dynamics of spatial and temporal changes in agrometeorological factors. Late spring and early autumn frosts are a limiting factor for agricultural crop production. In general, such frosts are of the radiation type. To study the spatial and temporal characteristics of the radiation frosts distribution in the North-West region of Russia, data of daily observations of the standard meteorological network from 1966 to 2015 were used. The change over the time in the average number of days with radiation frosts was calculated for two 25-year periods: from 1966 to 1990 and from 1991 to 2015. Two zones of multidirectional change of the average number of days with radiation frosts in the period from 1991 to 2015 were revealed. The decrease in the average number of days with radiation frosts during this period was recorded at the weather stations of Vologda and Leningrad (except for the weather station Belogorka) and the meteorological station Velikie Luky (Pskov region). At the same time all the weather stations of this zone (with the exception of the Vyborg weather station) are characterized by the higher number of days with radiation frosts then the weather station of the other zone. The increase in the average number of days with radiation frosts during this period was noted at the weather stations of the Pskov, Novgorod, Kaliningrad regions and the weather station Belogorka (Leningrad region).

scholarly journals New Finds of Cup-marked Stones near the Village of Ol’khovka, Priozersky District, Leningrad Region

2018 ◽  
Author(s):  
А.И. Сакса ◽  
С.В. Бельский ◽  
В.Г. Мизин
Keyword(s):  
Protected Area ◽  
Leningrad Region ◽  
Karelian Isthmus ◽  
Fully Integrated ◽  
North West ◽  
The North ◽  
Surrounding Landscape ◽  
The Village

В статье представлена публикация пяти новых чашечных камней, относящихся к категории почитаемых природных объектов, найденных в 2016–2017 гг. на Карельском перешейке (Приозерский район Ленинградской области). Комплекс археологических памятников, в том числе чашечных камней, у д. Ольховка представляет собой уникальное явление, поскольку это крупнейшее скопление подобных объектов на Северо-Западе России. В ходе разведок 2016–2017 гг. были обнаружены еще пять ранее неизвестных камней с чашевидными углублениями. Новые находки чашечных камней указывают на то, что территория комплекса еще до конца не изучена. Имеются серьезные предпосылки для поиска новых памятников подобного типа. Необходимо признание всей территории локализации археологических объектов в данном районе единой охраняемой зоной. Комплекс должен быть сохранен как природно-исторический ансамбль, составляющий единое целое с окружающим ландшафтом. The paper reports on five new cup-marked stones referred to the category of natural features revered by people which were found on the Karelian Isthmus (Priozersky District, Leningrad Region) in 2016–2017. The complex of sites including cup-marked stones near the village of Ol’khovka is a unique phenomenon because it is the largest concentration of such features in the North-West of Russia. In the course of archaeological reconnaissance in 2016–2017 five more previously unknown cup-marked stones were discovered. New finds of cup-marked stones demonstrate that the area of the complex has not yet been studied comprehensively. It is essential to continue searching for new sites of this type. The district where archaeological features are located should be declared a single protected area. The complex should be preserved as a natural and historical ensemble fully integrated into the surrounding landscape.

scholarly journals New form of Lonicera nigra L. (Caprifoliaceae) is found in the environs of village Privetninskoe in Leningrad Region (Russia)

2020 ◽  
Author(s):  
А.В. Бялт ◽  
В.В. Бялт
Keyword(s):  
European Part ◽  
Leningrad Region ◽  
Type Specimens ◽  
Latin Diagnosis ◽  
North West ◽  
The North ◽  
European Part Of Russia ◽  
New Form ◽  
The Difference ◽  
The Village

В статье даны название и описание новой для науки формы жимолости чёрной – Lonicera nigra L. f. purpurea A.V. Byalt & V.V. Byalt f. nova. (Caprifoliaceae), обнаруженной в окрестностях поселка Приветнинское Ленинградской области. Растение имеет характерные пурпурные листья. Приведена информация о месте произрастания, отличии новой формы от близких таксонов (составлен латинский диагноз), указаны типовые образцы (голотип и изотип) и место их хранения (Гербарий БИН РАН – LE). Декоративность новой формы позволяет рекомендовать её для озеленения в культуре в г. Санкт-Петербурге и других городах Северо-Запада Европейской части России, как и сам вид, хорошо адаптировавшийся в регионе. Статья иллюстрирована 3 фотографиями и картой. In the article a new for science form of black honeysuckle – Lonicera nigra L. f. purpurea A.V. Byalt & V.V. Byalt f. nova (Caprifoliaceae) was found in the vicinity of the village Privetninskoye, Leningrad region, it differs by very characteristic purple leaves. Information is given on the place of growth, the difference between a new form from close taxa (Latin diagnosis is given) and the type specimens (holotype and isotype) and their storage sites are indicated. The decorativeness of the new form allows us to recommend it for gardening in culture in St. Petersburg and other cities of the North-West of the European part of Russia, as well as the species itself, which is well adapted in the region. The article is illustrated with 3 photos and a map.

scholarly journals Meadows and pastures in the agricultural landscapes of the Karelian province of the Middle Taiga zone of the North-West of Russia

2021 ◽  
Vol 901 (1) ◽  
pp. 012037
Author(s):  
I A Trofimov ◽  
L S Trofimova ◽  
E P Yakovleva ◽  
D M Teberdiev ◽  
A A Kutuzova ◽  
...  
Keyword(s):  
Agricultural Land ◽  
Arable Land ◽  
Agricultural Landscapes ◽  
Middle Taiga ◽  
Leningrad Region ◽  
Taiga Zone ◽  
North West ◽  
Podzolic Soils ◽  
The North ◽  
Mixed Grass

Abstract In order to take into account the territorial differences of natural and economic conditions, to identify biological and ecological patterns, the agro-landscape and ecological zoning of natural forage lands (NFL) of the North-Western natural and economic region of the Russian Federation has been developed. The Karelian province occupies 23% of the area in the north of the Leningrad region, bordering Karelia and Finland. The Karelian province is located in the western part of the Middle Taiga zone, which is characterized by Eastern European Middle Taiga plains. Most of the area of the province (65%) is covered by forests. Agricultural land occupies only 4% of the total area of the province. Including arable land – 2%, hayfields and pastures – 1% each. The territory of the province is significantly moistened and swampy. Swamps occupy 11% of the area, under water – about 11%. Shrubs occupy 3% of the area of the province, other land – about 6%. The structure of NFL is dominated (53%) by normally moistened dry-grass grasslands on sod-podzolic soils. Fine-grained sweet-scented and finegrained grasslands with a large participation of various grasses are common. The yield of hay is 9–13 c/ha, feed is 70 c/ha. Grass-mixed grass and grass-sedge-mixed grass lowland and swampy meadows on swamp-podzolic soils occupy 44%. Grass stands with the dominance of the sod pike are common. Swampy depressions are occupied by large-seeded grass stands. The yield of hay is 10–15 c/ha, feed is 9–11 c/ha. The ecological state of the province’s landscapes is satisfactory-tense.

Sign in / Sign up

Export Citation Format

Share Document