翻訳と辞書 Words near each other ・ Disease diffusion mapping ・ Disease gene identification ・ Disease in colonial America ・ Disease in Imperial Rome ・ Disease in ornamental fish ・ Disease informatics ・ Disease management ・ Disease management (agriculture) ・ Disease management (health) ・ Disease model of addiction ・ Disease Models & Mechanisms ・ Disease mongering ・ Disease Ontology ・ Disease registry ・ Disease reservoir ・ Disease resistance in fruit and vegetables ・ Disease surveillance ・ Disease surveillance in China ・ Disease theory of alcoholism ・ Disease-modifying antirheumatic drug ・ Diseased Pariah News ・ Diseases and epidemics of the 19th century ・ Diseases and parasites in cod ・ Diseases and parasites in salmon ・ Diseases Database ・ Diseases from Space ・ Diseases of affluence ・ Diseases of Canaries ・ Diseases of poverty ・ Diseases of the foot Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Disease resistance in fruit and vegetables ： ウィキペディア英語版 Disease resistance in fruit and vegetables There are a number of lines of defence against pests (that, those animals that cause damage to the plants we grow) and diseases in the O, principal among these being the practice of good husbandry, creating healthy soil and ensuring high standards of garden hygiene. But no matter how diverse and healthy the garden eco-system may be, there will always be a degree of disease and pest presence. In many ways, some level of pathogen population in the garden can be not only acceptable but desirable as they are indicative of a generally healthful and diverse environment, and add to the overall robustness of the system as an immunity to such detrimental influences will build up, particularly in a balanced polycultural regime. Indeed, most of the plants we grow will tend to be selected because they are trouble free, and those that are more susceptible to attack will have fallen by the wayside over time. However, most farmers find it unacceptable that the food crops they grow are damaged by pests. For these crops there has been considerable research and selective breeding carried out in order to find cultivars that are resistant or immune to pest and disease damage. Breeding for plant disease resistance generally has involved finding suitable genetic material amongst existing stocks or in the wild, which is then incorporated into commercial varieties. ==Example: The apple== (詳細はapples, in which research is being carried out in order to develop resistance to diseases such as apple scab (''Venturia inaequalis''), powdery mildew (''Podosphaera leucotricha''), orchard fireblight (''Erwinia amylovora''), woolly apple aphid (''Eriosoma lanigerum'') and collar rot (''Phytophthora cactorum''), the main sources of resistant material used in breeding programmes such as those being run by East Malling Research Station in England or Hortresearch in New Zealand are major gene resistances derived from crab-apples. The Vf gene for black spot resistance is derived from the ornamental crab-apple species ''Malus floribunda''. Most black spot resistant cultivars developed around the world carry this gene, but there are some selections that carry the Vr (from M. pumila) or Vm (from M. micromalus) gene. Major gene resistances to powdery mildew are derived from M. robusta (Pl1) and M. zumi (Pl2), and the apple cultivar ''Northern Spy'' has a long-standing reputation for its major gene resistance to woolly apple aphid. Since early this century this resistance has been used to develop woolly aphid resistant rootstocks such as MM.106 and M.793. Much later it was shown that the cultivar was also very resistant to collar rot and a useful breeding parent for this resistance. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Disease resistance in fruit and vegetables」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.