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Distribution of Heterodera glycines Races in Brazil

机译：巴西异型藻甘氨酸种族分布

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Soybean cyst nematode, Heterodera glycines, populations were obtained from the states of Goias, Mato Grosso, Mato Grosso do Sul, and Minas Gerais in 1993 from infested fields and greenhouse cultures. Collections were brought under quarantine to Urbana, Illinois for race identification. Nematodes were cultured on 'Lee 68' soybean, and races were identified using 'Lee 68' as the susceptible host and the soybeans 'Pickett 71', 'Peking', PI88.788, and PI90.763 as differential hosts. Plants were inoculated with second-stage juveniles and after approximately 1 month, numbers of white females that had developed on each plant were determined. A female index (FI = [{?overline{x? of females that developed on the differential?/{?overline{x? of females that developed on Lee 68?] x 100) was calculated for each differential soybean line and a race was designated for each population. Races 2, 3, and 5 were identified in collections obtained in Mato Grosso. Races 3 and 14 were identified in collecti
机译：大豆囊肿线虫，异型藻甘氨酸，种群是1993年从戈亚斯州，马托格罗索州，南马托格罗索州和米纳斯吉拉斯州受侵染的田野和温室栽培获得的。收集品被隔离到伊利诺伊州厄巴纳，以进行种族识别。在“ Lee 68”大豆上培养线虫，并使用“ Lee 68”作为易感宿主，并使用大豆“ Pickett 71”，“ Peking”，PI88.788和PI90.763作为差异宿主鉴定种族。用第二阶段的幼虫接种植物，大约1个月后，确定每株植物上已发育的白人雌性的数量。对于每个差异大豆品系和一个种族，计算出一个雌性指数（FI = [在差异水平上发育的雌性的{{overline {x“ /在Lee 68？上发育的雌性的overline {x”）x 100）被指定用于每个人口。从Mato Grosso获得的收藏中鉴定了第2、3和5个种族。在collecti中确定了种族3和14

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