{"id":10336,"date":"2010-02-04T00:00:00","date_gmt":"2010-02-04T05:00:00","guid":{"rendered":"http:\/\/www.farmchemicalsinternational.com\/2010\/02\/04\/wild-oat-genes-could-combat-crown-rust\/"},"modified":"2019-09-16T13:46:16","modified_gmt":"2019-09-16T17:46:16","slug":"wild-oat-genes-could-combat-crown-rust","status":"publish","type":"post","link":"https:\/\/www.agribusinessglobal.com\/pt\/industry-news\/wild-oat-genes-could-combat-crown-rust\/","title":{"rendered":"Genes de aveia selvagem podem combater a ferrugem da coroa"},"content":{"rendered":"<p>ST. PAUL, Minnesota, EUA \u2014 Cientistas do Servi\u00e7o de Pesquisa Agr\u00edcola (<a href=\"http:\/\/www.ars.usda.gov\/is\/AR\/archive\/feb10\/rust0210.htm\">ARS<\/a>), a principal ag\u00eancia de pesquisa cient\u00edfica interna do Departamento de Agricultura dos EUA (<a href=\"http:\/\/www.usda.gov\">USDA<\/a>), est\u00e3o buscando o DNA da aveia selvagem como um poss\u00edvel combatente contra a ferrugem da coroa, a doen\u00e7a f\u00fangica mais prejudicial da aveia, relata a ARS em um comunicado \u00e0 imprensa. A aveia selvagem, geralmente considerada uma erva daninha, parece ter resist\u00eancia eficaz contra <em>Puccinia coronata<\/em>, o fungo que causa ferrugem da coroa, relata a ARS.<em> P. coronata&nbsp;<\/em>reduz os rendimentos de aveia em at\u00e9 40% e pode se adaptar a variedades criadas para resistir geneticamente a ela. Pesquisadores e colegas da ARS inseriram genes de resist\u00eancia individuais em variedades de aveia que produzem prote\u00ednas que se acredita reconhecerem cepas de ferrugem da coroa e desencadearem uma resposta de defesa contra elas. Cultivares \u201cmultilinhas\u201d com v\u00e1rios genes de resist\u00eancia tamb\u00e9m foram desenvolvidos.<\/p>\n<p>De acordo com Martin L. Carson, l\u00edder de pesquisa no Laborat\u00f3rio de Doen\u00e7as Cereais da ARS em St. Paul, Minnesota, EUA, P. coronata se reproduz tanto sexualmente quanto assexuadamente e tem flexibilidade gen\u00e9tica suficiente para superar genes de resist\u00eancia, geralmente em cerca de cinco anos. A an\u00e1lise de Carson tamb\u00e9m mostra que a ferrugem da coroa est\u00e1 aumentando em virul\u00eancia em toda a Am\u00e9rica do Norte.<\/p>\n<p>Carson inoculou com ferrugem da coroa as mudas de <em>Aveia barbata<\/em>, a aveia delgada. Ap\u00f3s v\u00e1rios cruzamentos com <em>A. barbata<\/em>, Carson encontrou mudas altamente resistentes a uma variedade de cepas de ferrugem da coroa. Em estudos em andamento, ele as est\u00e1 cruzando com a aveia dom\u00e9stica, <em>A. sativa<\/em>, para tentar desenvolver a mistura certa de resist\u00eancia e caracter\u00edsticas desej\u00e1veis, como alto rendimento e toler\u00e2ncia \u00e0 seca. O objetivo s\u00e3o novas linhagens de plantas que combatam eficazmente a ferrugem da coroa por muitos anos.<\/p>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>ST. PAUL, Minnesota, EUA \u2014 Cientistas do Servi\u00e7o de Pesquisa Agr\u00edcola (ARS), a principal ag\u00eancia de pesquisa cient\u00edfica interna dos EUA\u2026<\/p>","protected":false},"author":110,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[489],"tags":[],"class_list":["post-10336","post","type-post","status-publish","format-standard","hentry","category-industry-news"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Wild Oat Genes Could Combat Crown Rust - AgriBusiness Global<\/title>\n<meta name=\"description\" content=\"ST. 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