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首页> 外文期刊>Genetic Resources and Crop Evolution >Evaluation of the USDA sweetpotato [Ipomoea batatas (L.) Lam.] germplasm collection for tolerance to the herbicide clomazone
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Evaluation of the USDA sweetpotato [Ipomoea batatas (L.) Lam.] germplasm collection for tolerance to the herbicide clomazone

机译：评价USDA SWELPOTATO [IPOMOEA BATATAS（L.）LAM]种质收集耐受除草剂划分的耐受性

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摘要

Sweetpotato [Ipomoea batatas (L.) Lam.], is an important food crop worldwide. Weed management is consistently ranked among the top priorities of the sweetpotato industry in the United States (U.S.). Unfortunately, weed management of sweetpotato in the U.S. can be challenging as there are few herbicides labeled for use on the crop. Clomazone is one of the most widely used herbicides on sweetpotato in the U.S. and is effective in controlling several annual broadleaf weed and grass species and there is interest in developing germplasm that is tolerant to the herbicide. There is a lack of information concerning clomazone tolerance for sweetpotato plant introductions (PIs) that are contained within the germplasm collection of the USDA, ARS, Plant Genetic Resources Conservation Unit. The present study evaluated 564 sweetpotato PIs for tolerance to clomazone under a recommended rate in a field plot, with the objective of identifying sources of tolerance to clomazone. Clomazone injury ratings [1 = no chlorosis, 3 = minor chlorosis (< 20% leaf area), 7 = moderate chlorosis (20-50%), 9 = severe chlorosis (> 50%)] of the 564 sweetpotato PIs indicated that the majority (N = 497 PIs) had either no chlorosis or minor damage. There is ample phenotypic diversity for periderm (skin) and stele (flesh) color and dry matter present within the clomazone tolerant PIs. Additionally, there is sufficient genetic diversity present, as 108 PIs have been characterized and assigned to four genetic clusters with another 81 PIs having high levels of mixed ancestry. The results reported here provide critical baseline data for future studies of resistance and practical breeding for tolerance to clomazone.
机译：SweetPoTato [Ipomoea Batatas（L.）Lam。]，是全球重要的粮食作物。杂草管理层始终如一地排名在美国甘娃娃行业的最重要优先事项（美国）。不幸的是，在美国甜美宾馆的杂草管理可能具有挑战性，因为少量贴上了作物的除草剂。柯洛塞酮是美国甘普托的最广泛使用的除草剂之一，在控制几年阔叶杂草和草地方面是有效的，并且有兴趣促进耐药物的种质。缺乏关于甘薯植物介绍（PIS）含有在USDA，ARS，植物遗传资源保护单元的种质收集中的甲孢素耐受性的信息。本研究评估了564个甘薯PIS在场图中的推荐速率下对甲唑酮进行耐受性，目的是鉴定对甲唑酮的耐受性的来源。裂缝杆菌损伤评级[1 = NO萎黄，3 =轻微萎黄（<20％叶面积），7 =中度萎黄（20-50％），9 =严重的萎黄（> 50％）] 564甘薯PIS表示大多数（n = 497 pIS）没有萎黄或轻微的损伤。在甲唑酮耐耐受性PIS内存在胰腺（皮肤）和肉体（肉）颜色和干物质的胰腺炎的表型多样性。另外，存在足够的遗传多样性，因为已经表征了108个PI，并分配到四种遗传簇，其具有高水平的混合血统的81个PI。结果报告的结果为未来的抗性和实际育种对裂缝酮的耐受性研究提供了关键的基线数据。

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