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首页> 外文期刊>Journal of Nematology, with Annual of Applied Nematology >Suppression of Rotylenchulus reniformis 122-cm Deep Endorses Resistance Introgression in Gossypium
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Suppression of Rotylenchulus reniformis 122-cm Deep Endorses Resistance Introgression in Gossypium

机译：抑制轮状轮虫122厘米深支持棉的抗性渗入

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摘要

Nine sources of resistance to Rotylenchulus reniformis in Gossypium (cotton) were tested by measuring population density (Pf) and root-length density 0 to 122 cm deep. A Pf in the plow layer less than the autumn sample treatment threshold used by consultants was considered the minimum criterion for acceptable resistance, regardless of population density at planting (Pi). Other criteria were ample roots and a Pf lower than on the susceptible control, as in pot studies. In a Texas field in 2001 and 2002, no resistant accessions had Pf less than the control but all did in microplots into which nematodes from Louisiana were introduced. An environmental chamber experiment ruled out nematode genetic variance and implicated unknown soil factors. Pf in field experiments in Louisiana, Mississippi, and Alabama were below threshold for zero, six and four of the accessions and above threshold in the control. Gossypium arboreum A2—87 and G. barbadenseGB-73 were the most resistant accessions. Results indicatethat cultivars developed from these sources will suppress R. reniformis populations but less than in pots in a single season.
机译：通过测量种群密度（Pf）和0至122 cm深的根长密度，测试了棉（棉）中对尼古丁假单胞菌的9种抗药性来源。不管种植时的人口密度（Pi）如何，犁地层中的Pf均小于顾问使用的秋季样品处理阈值，是可接受的抗性的最低标准。其他标准是根系充足，Pf低于易感对照，如盆栽研究中所示。在2001年和2002年的得克萨斯州田间，没有抗性种质的Pf值低于对照，但在从路易斯安那州引入线虫的微孔中均具有Pf。一项环境室实验排除了线虫的遗传变异，并暗示了未知的土壤因素。在路易斯安那州，密西西比州和阿拉巴马州的田间试验中，Pf分别低于零，六和四份添加物的阈值，而高于对照中的阈值。陆地棉A2-87和巴巴德氏菌GB-7 3是最抗性的种质。结果表明，从这些来源培育出的栽培品种将抑制雷蒙德罗非鱼种群，但比单个季节的盆栽要少。

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