大豆种质对疫霉根腐病抗性特点研究

The resistance of soybean germplasm to Phytophthora root rot

对1027份中国和国外引进的大豆种质进行了大豆疫霉(Phytophthora sojae)根腐病的抗病性鉴定评价。结果表明,中国大豆种质的抗病性高于国外引进种质;中国南方的大豆种质抗病性较北方种质强,长江流域大豆中抗病种质比率最高,其次为黄淮海流域种质,而东北地区抗病种质较少;不同省份大豆种质的总体抗病性差异明显;育成品系的抗性好于改良品种和农家种,但不同省份来源的农家种、品系和品种抗性存在差异,黑龙江材料抗病性最低,这也是该省大豆疫霉根腐病严重发生的重要原因之一;在大豆籽粒脐色为黄色和褐色的材料中,抗病种质较多。

1027 soybean germplasm were screened and evaluated for resistance to root rot,caused by Phytopththora sojae.The results showed that the resistance of Chinese soybean germplasm was better than that of introduced ones;The germplasm from south of China was higher resistant to root rot than north ones; The germplasm from Yangtze River Basin was highest resistant,the germplasm from Yellow River,Huaihe River and Haihe River Basins was higher and the Northeast ones were low.The resistance of breeding lines was better than cultivars and landraces and there were different in resistance in the germplasm from different provinces,of which Heilongjiang germplasm was lowest resistant to Phytophthora root rot.It was one of the important causes of occurrence of Phytophthora root rot in the Province.There were more resistant germplasm in colorless,yellow and brown color types of seed navel.