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首页> 外文期刊>Acta Horticulturae >The use of non-transgenic technologies for the development of Papaya ringspot virus resistance in Carica papaya.
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The use of non-transgenic technologies for the development of Papaya ringspot virus resistance in Carica papaya.

机译：使用非转基因技术开发番木瓜番木瓜环斑病毒抗性。

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Despite availability of transgenic papaya that are resistant to Papaya ringspot virus form P (PRSV-P), the virus continues to spread and be the major disease of Carica papaya (papaya) worldwide. Transgenic papaya containing PRSV-P coat protein constructs, and that are resistant to PRSV-P have become increasingly available over the last 20 years, and have been developed in many countries against many strains of the virus. However, transgenic papayas have not been accepted by governments in most countries and none of the top 20 papaya producing countries grow transgenic papaya for commercial production. An alternative to transgenic technology is intergeneric hybridization of papaya with PRSV-P resistant Vasconcellea species and subsequent backcrossing of the resistance to papaya. Papaya has been hybridised with PRSV-P resistant V. quercifolia and the virus resistance backcrossed into papaya. Backcross 4 and 5 generations have been shown to exhibit resistance to both the Philippine and Australian strains of PRSV-P. However, the resistant plants do produce mild symptoms of the virus at certain stages of growth. A more durable resistance to PRSV-P has been demonstrated by V. pubescens which appears to be immune to PRSV-P. As F1 populations between papaya and V. pubescens are infertile, V. parviflora is being used as a bridging species to transfer PRSV-P resistance from V. pubescens to papaya. Molecular markers have been developed for PRSV-P resistance in V. pubescens and are being developed for V. quercifolia. Putative resistance genes for PRSV-P resistance in V. pubescens are being sequenced and characterised. When transgenic papaya are accepted for production in more countries, it is expected that both transgenic resistance and resistance from Vasconcellea species can be combined to provide durable resistance to PRSV-P and progress towards elimination of this devastating disease.
机译：尽管可获得对木瓜环斑病毒形式P（PRSV-P）具有抗性的转基因木瓜，该病毒仍在继续传播，并且是全世界番木瓜的主要疾病。在过去的20年中，越来越多地获得了含有PRSV-P外壳蛋白构建体并对PRSV-P具有抗性的转基因木瓜，并已在许多国家开发了针对许多病毒株的疫苗。然而，大多数国家的政府尚未接受转基因木瓜，而排名前20的木瓜生产国中没有一个将转基因木瓜用于商业生产。转基因技术的替代方法是将木瓜与抗PRSV-P的Vasconcellea物种进行属间杂交，然后对木瓜的抗性进行回交。木瓜已经与抗PRSV-P的槲寄生弧菌杂交，并且病毒抗性回交到木瓜中。已经证明回交的第4代和第5代对PRSV-P的菲律宾和澳大利亚菌株均表现出抗性。但是，抗性植物在某些生长阶段确实会产生病毒的轻度症状。毛孢弧菌已显示出对PRSV-P的更持久的抗性，似乎对PRSV-P免疫。由于番木瓜和毛柔毛之间的F 1 种群不育，因此细小毛柔毛被用作将PRSV-P耐药性从毛毛柔毛转移到木瓜的桥接物种。已经开发了用于毛毛线虫对PRSV-P抗性的分子标记，并且正在开发用于槲皮球菌的分子标记。对毛绒毛毛虫PRSV-P抗性的推定抗性基因进行测序和鉴定。当更多国家接受了转基因木瓜的生产时，预计转基因抗性和Vasconcellea物种的抗性可以结合起来提供对PRSV-P的持久抗性，并朝着消除这种毁灭性疾病的方向发展。

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    《Acta Horticulturae》 |2014年第1022期|共7页
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    Drew R.;

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