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Search Results: 1 - 10 of 219347 matches for " C Mukankusi "
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Improvement of resistance to Fusarium root rot through gene pyramiding in common bean
J Obala, C Mukankusi, PR Rubaihayo, P Gibson, R Edema
African Crop Science Journal , 2012,
Abstract: Fusarium root rot (FRR), caused by Fusarium solani f.sp. , is one of the most serious root rot diseases of common bean (Phaseolus vulgaris L.) throughout the world. Yield losses of up to 84% have been attributed to the disease. Development and deployment of resistant materials is the most feasible approach to managing the disease. The objective of this study was to estimate the number of pyramided Fusarium root rot resistance genes among the four resistant lines and determine their effectiveness in improving levels of resistance to Fusarium root rot in the susceptible bean cultivars. Crosses among four Fusarium root rot (Fusarium solani f.sp. phaseoli) resistant common bean (Phaseolus vulgaris) were developed. They involved six inbred lines, MLB-48-89A (M48), MLB-49-89A (M49), G2333 (G2) and G685 (G6), and two susceptible cultivars, K20 and Kanyebwa, The resistant lines were used to develop a double cross (DC) population. The DC F1 and each resistant parent were crossed to each of the two susceptible cultivars to form five-parent and single crosses, respectively. Developed populations were subjected to Fusarium solani f. sp. phasoeli isolate-3 under screenhouse conditions. There were segregation ratios of 15:1 (χ2 = 1.89, P = 0.17), 61:3 (χ2 = 0.18, P = 0.67) and 249:7 (χ2 = 1.74, P = 0.19) indicating that two, three and four genes independently condition resistance to F. solani in lines G2 x G6, M49 x M48 and (M49 x M48) x (G2 x G6). A good fit of only four genes in the double cross compared to two in the G2 x G6 , and three genes in the M49 x M48 cross suggests that at least one parent in the G2 x G6 cross have the same or closely linked genes as a parent in the M49 x M48 cross. The F1 means of the five-parent cross (FPC) involving either susceptible parent had lower disease scores, though not significantly (P > 0.05), than the single-crosses from that parent. The F2 of both FPC showed less disease than the single-cross (SC) means (P < 0.05) compared to the single-cross (SC) while the F2 of both FPC had a significant negative deviation (P < 0.05). The F2 frequency distributions also showed that the FPC in both Kanyebwa and K20 populations had higher proportions of resistant plants than any of the single crosses in the respective populations. The superior performance of the FPC over the SC demonstrates that combining resistance genes form different FRR resistance sources can provide a stable source of resistance than using single sources of resistance. African Crop Science Journal, Vol. 20, Issue Supplement s1, pp. 1 - 13
Development and delivery of bean varieties in Africa: The Pan-Africa bean research alliance (PABRA) model
R Buruchara, R Chirwa, L Sperling, C Mukankusi, JC Rubyogo, R Mutonhi, MM Abang
African Crop Science Journal , 2011,
Abstract: Common bean (Phaseolus vulgaris L.) has evolved rapidly in Africa and is steadily transforming from a traditional subsistence to a market-oriented crop, with major impacts on household incomes, food and nutritional security, and national economies. However, these benefits are yet to be felt in many parts of the continent because of multiple constraints that limit bean productivity. The Pan-Africa Bean Research Alliance (PABRA) has been at the forefront of efforts to accelerate the transition of beans from a subsistence crop to a modern commodity in Sub-Saharan Africa. This paper presents a unique partnership model and the breeding and seed delivery strategies used by PABRA to reach millions of beneficiaries with improved bean varieties. The breeding strategy involved the paradigm shift from a monolithic approach where varieties were bred for yield or resistance to single environmental stresses, to a grain type-led and market-driven approach. The PABRA model comprises partnerships between and among Centro Internacional de Agricultura Tropical (CIAT), National Agricultural Research Systems (NARS), public and private sector actors along the varied bean product value chains, and technology end-users. This model led to the release of over 200 varieties during 2003-2011, including beans with resistance to multiple constraints (biotic and abiotic), high iron and zinc content, and those for specific niche markets. PABRA reached 7.5 million households with seed of improved bean varieties during 2003– 2008 and is expected to reach an additional 14 million by 2013. From this undertaking, aspects that lend to policy recommendations to key stakeholders in the common beans value chain include: facilitation of access to credit; promotion of breeder and foundation seed production; easing of restrictions on the release of varieties; facilitation of collective marketing schemes; and deliberate policy frameworks to encourage the use of complementary integrated crop management practices.
Evaluating Genetic Association between Fusarium and Pythium Root Rots Resistances in the Bean Genotype RWR 719
PO Ongom, ST Nkalubo, PT Gibson, CM Mukankusi, PR Rubaihayo
African Crop Science Journal , 2012,
Abstract: Resistance to Fusarium root rot (Fusarium solani f.s.p phaseoli) has been reported in common bean (Phaseolus vulgaris L.) sources and is usually associated with Pythium root rot resistance. Pythium root rot (Pythium ultimum var ultimum) resistance is controlled by a single dominant gene, marked by a SCAR marker PYAA19800. It remains unclear whether the inheritance to resistance of these two bean root rots is genetically independent. We evaluated the association of Fusarium root rot resistance with the Pythium root rots resistance gene and/or the molecular marker PYAA19800 in genotype RWR 719. Two populations; F2 and F2:3 lines, generated from RWR 719 (resistant) × K132 (susceptible) were respectively screened with Fusarium solani and Pythium ultimum isolates, and root damages were scored based on the CIAT 1 – 9 scale. Additionally, the F2:3 lines were screened with PYAA19800. The F2 segregation ratio deviated from a single gene model for reaction to Fusarium solani. The F2:3 lines fit the model for a single dominant gene that confers resistance to Pythium ultimum. Fusarium solani and Pythium ultimum resistances were inherited independently. There was lack of association between PYAA19800 and Fusarium solani resistance, but the PYAA19800 was strongly associated with Pythium ultimum resistance. This contradicts the assertion of linkage of the two resistances that was deduced based on the joint occurrence of both resistances in the available donor genotypes.
ВПЛИВ Х М ЧНОГО СКЛАДУ НА ТИСК НАСИЧЕНО ПАРИ В МОТОРНИХ Б ОЛОГ ЧНИХ ПАЛИВАХ The influence of chemical composition on the saturated vapor pressure in biological motor fuels Влияние химического состава на давление насыщенного пара в моторных биологических топливах
?.В. Полунк?н,C.О. Зубенко,О.О. Гайдай,А.В. Струнгар
Proceedings of National Aviation University , 2010,
Abstract: Розглянуто вплив випаровуваност альтернативних палив на р шення проблеми холодного пуску двигуна за рахунок використання пропан-бутаново сум ш для п двищення тиску насичено пари. Volatility fuels fraction of the estimated parameters and letkosti. Volatility characterizes the ability to switch fuels in vaporous state. Selecting indicators to assess the volatility depends on the chemical composition of fuel. The main measure letkosti etanolnogo fuel is vapor pressure. The most simple and cost-effective to improve cold start is putting in fuel lehkoletyuchyh components: butane, izopentanu, gas and other petroleum. It was investigated the influence of DEE on alcohol-gasoline blend, the results show that DEE positive impact on increasing vapor pressure to the desired minimum for starting the engine. But because the ether to 19%, then at such high levels can actively formed peroxide compounds, which is undesirable. Very promising is the use of propane-butane gas mixture as lehkoletyuchoyi gaseous component. Butanizovani spirit-petrol mixture can be recommended for use as alternative fuel vehicles after further study of their stability and himmotolohichnyh characteristics. Автомобильные бензины и альтернативные биологические топлива на основе этанола преимущественно предназначены для применения в двигателях внутреннего сгорания. При использовании альтернативного биологического топлива, особенно этанольного, возникает проблема недостаточной испаряемости бензина при низкой температуре, в результате чего в холодное время года двигатель может не запуститься. Пусковые свойства бензина зависят от содержания в них летучих фракций или летучих соединений. Проблему холодного запуска предлагается решать за счет использования пропан-бутановой смеси для повышения давления насыщенного пара. Для перспективного применения газов пропан-бутановой смеси легколетучего газообразного компонента необходимы дальнейшие исследования стабилизации такой композиции.
Strategic trends of development of the Lithuanian aviation in the light of Euro-integration processes Стратегические направления развития авиации литвы в свете евроинтеграции процессов СТРАТЕГ ЧНИЙ НАПРЯМ РОЗВИТКУ АВ АЦ ЛИТВИ У СВ ТЛИ ВРО НТЕГРАЦ ЙНИХ ПРОЦЕС В
Й. Станкунаc
Proceedings of National Aviation University , 2004,
Abstract: The factors having an effect on the system of air transport in the Republic of Lithuania in connection with Lithuania’s membership in the European Union are discussed. The structure of the system of air transport of the country is presented, an analysis of the current situation and a strategic analysis of the development of the system is made, and the measures addressed at the long-range perspective are proposed. Рассмотрены факторы, действующие в системе воздушного транспорта Литовской Республики после вступления в Европейский Союз. Приведена структура системы воздушного транспорта страны и выполнен стратегический анализ развития транспортной системы на долгосрочную перспективу. Розглянуто чинники, що д ють у систем пов тряного транспорту Литовсько Республ ки п сля вступу в вропейський Союз. Подано структуру систем пов тряного транспорту кра ни та виконано стратег чний анал з розвитку транспортно системи на довгострокову перспективу.
LIMIT DISTRIBUTION OF A RANK OF RANDOM SATURATED MATRIX ABOVE A FIELD GF(2) ПРЕДЕЛЬНОЕ РАСПРЕДЕЛЕНИЕ РАНГА СИЛЬНОЗАПОЛНЕННОЙ СЛУЧАЙНОЙ МАТРИЦЫ НАД ПОЛЕМ GF(2) ГРАНИЧНИЙ РОЗПОД Л РАНГУ СИЛЬНОЗАПОВНЕНО ВИПАДКОВО МАТРИЦ В ПОЛ GF(2)
C.В. Поперешняк
Proceedings of National Aviation University , 2012,
Abstract: In this paper a theorem on the asymptotic distribution of rank of random matrices in the field GF (2) of independent random -D lines, the absence in it of unity lines and the assumption that the difference between the number of rows and number of columns of the matrix is a fixed number of random characters, . Получена теорема про асимптотику распределения ранга случайной матрицы над полем GF(2), которая состоит из независимых случайных -мерных строк, при условии отсутствия в ней единичных линий и в предположении, что разница между числом строк и числом столбцов матрицы фиксированное число произвольного знака, . Отримано теорему про асимптотику розпод лу рангу випадково матриц в пол GF(2) з незалежних випадкових -вим рних рядк в за умови в дсутност в н й одиничних л н й та в припущенн , що р зниця м ж числом рядк в та числом стовпц в матриц ф ксоване число дов льного знаку,
TEACHING IN THE CONDITIONS OF INFORMATIVE-EDUCATIONAL SPACE OF DIGITAL SCHOOL НАВЧАННЯ В УМОВАХ НФОРМАЦ ЙНО-ОСВ ТНЬОГО ПРОСТОРУ ЦИФРОВО ШКОЛИ
?.М. Cмирнова-Трибульска
Information Technologies and Learning Tools , 2010,
Abstract: In the article basic descriptions of teaching in the conditions of informative-educational environment of school of a new structure are considered – digital taking into account the personality-oriented paradigm of education; the example of the use of school as a Multicenter is represented, the substantive provisions of the European project of eEurope 2010 are analyzed, touching informatizations of education, in particular schools which it is possible to examine as a model of near future. У статт розглянут основн характеристики навчання в умовах нформац йно-осв тнього простору школи ново формац – цифрово з врахуванням особист сно-ор нтовано парадигми осв ти; поданий приклад використання школи як Мультицентру, проанал зован основн положення вропейського проекту eEurope 2010, що стосуються нформатизац осв ти та зокрема шк л, як можна розглядати як модел недалекого майбутнього.
THE CREATION OF AUTHORITATIVE FILE NAMED THE COLLECTIVE AUTHOR ON THE BASE OF ABIS IRBIS FOR THE ELECTRONIC CATALOGUE OF V. SUKHOMLYNSKY STATE PEDAGOGICAL SCIENCE LIBRARY OF UKRAINE СТВОРЕННЯ АВТОРИТЕТНОГО ФАЙЛУ КОЛЕКТИВНИЙ АВТОР НА БАЗ АБ С РБ С ДЛЯ ЕЛЕКТРОННОГО КАТАЛОГУ ДЕРЖАВНО НАУКОВО-ПЕДАГОГ ЧНО Б БЛ ОТЕКИ УКРА НИ МЕН В. О. СУХОМЛИНСЬКОГО
C. Коваленко,Р. Гаврилюк
Information Technologies and Learning Tools , 2010,
Abstract: У пер од створення електронного каталогу в ДНПБ Укра ни м. В. О. Сухомлинського актуальним питання ведення авторитетного файлу заголовк в колективного автора. Дана стаття присвячена стор виток в авторитетного контролю, технолог створення авторитетного файлу Колективний автор (АФ КА ), а також проблемам, як виникають у ход створення та ведення АФ КА . In the period of creation of electronic catalogue in V. Sukhomlynsky state pedagogical science library of Ukraine the question of conducting of authoritative file of titles of collective author is actual. The given article is devoted to the history of sources of authoritative control, technology of creation of authoritative file Collective author and also to the problems which arise up during the creation and conducting of the file.
AUTOMATION OF DOCUMENTS PROCESSING IN THE INFORMATION SYSTEM OF RESEARCH PLANNING IN NATIONAL ACADEMY OF PEDAGOGICAL SCIENCES OF UKRAINE АВТОМАТИЗАЦ Я ОБРОБКИ ДОКУМЕНТ В В НФОРМАЦ ЙН Й СИСТЕМ ПЛАНУВАННЯ НАУКОВИХ ДОСЛ ДЖЕНЬ В НАЦ ОНАЛЬН Й АКАДЕМ ПЕДАГОГ ЧНИХ НАУК УКРА НИ
C.М. Тукало
Information Technologies and Learning Tools , 2011,
Abstract: The material presented in the article is relevant because of the need of modern information technologies introduction in the document flow in the process of researches planning in NAPS of Ukraine to increase their effectiveness, coordination and organization. The article suggests a method of forming and processing of documents in an integrated environment of Windows SharePoint Services — Microsoft Word, through which the Institute of Information Technologies and Learning Tools of NAPS of Ukraine is designing an information system Research planning in NAPS Ukraine based on the Internet 0109U002139. Матер али, викладен у статт , актуальними у зв’язку з необх дн стю впровадження сучасних нформац йних технолог й у процеси документооб гу стосовно процес в планування наукових досл джень в НАПН Укра ни з метою п двищення ефективност х, координац та орган зац . У статт запропоновано метод формування й обробки документ в в нтегрованому середовищ Windows SharePoint Services — Microsoft Word, на основ якого нститутом нформац йних сиcтем засоб в навчання зд йсню ться проектування нформац йно системи Планування наукових досл джень в НАПН Укра ни на баз мереж нтернет д. р. 0109U002139.
THE INFLUENCE OF COMPUTER GAMES ON FORMING OF ELEMENTS OF LOGICAL THOUGHT FOR CHILDREN OF SENIOR PRESCHOOL AGE ВПЛИВ КОМП’ЮТЕРНИХ ГОР НА ФОРМУВАННЯ ЕЛЕМЕНТ В ЛОГ ЧНОГО МИСЛЕННЯ У Д ТЕЙ СТАРШОГО ДОШК ЛЬНОГО В КУ
C.М. ?ванова
Information Technologies and Learning Tools , 2010,
Abstract: This article is about problems of influence of computer games on formation of logic elements of thinking on children of the senior preschool age. The analysis of some multimedia educational complexes for preschool children are given. Стаття да короткий огляд впливу комп'ютерних гор на формування елемент в лог чного мислення на д тей старшого дошк льного в ку. Пропону ться анал з деяких мультимед йних навчальних комплекс в для дошк льник в.
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