黑龙江省主要栽培大豆品种(系)对大豆疫霉根腐病的多抗性评价

用下胚轴伤口接种方法接种鉴定黑龙江省60个栽培大豆品种和育成品系对5个具有不同毒力大豆疫霉菌菌株41-4、PMCl、USAR4、PSZJ6和USAR17的抗性.有50个品种(系)抗1个或1个以上茵株或表现中间类型,其中有5个、8个、16个和21个品种(系)分别对4个、3个、2个和1个菌株表现抗性或中间类型.60个品种(系)对5个菌株共产生12种反应模式,其中呈RRSSR反应类型的品种(系)可能含有Rpslα或Rpslc基因,品系农大3861可能含有Rps3c基因,呈SSSSS反应模式的品种(系)可能含有Rps7基因,或不含抗病基因;其它9种反应模式与含有已知单基因品种或单基因组合的反应模式不同,可能具有未知抗病基因.该研究结果表明,黑龙江省具有较丰富的抗大豆疫霉根腐病大豆品种(系),大部分品种(系)的抗性是有效的,可合理地用于大豆生产和抗疫霉根腐病育种.

Response of Soybean Cultivars or Lines Developed in Heilongjiang Province to Five Strains of Phytophthora sojae

Sixty Soybean cultivars or lines were evaluated for their responses to strains 41 1, PMC1, USAR1, PSZJ6, and USAR17 of Phytophthora sojae using the hypocotyls inoculation technique. Fifty cultivars or lines were identified that confer resistant or intermediate responses to one or more of the five strains of the pathogen. Of these, 5, 8, 16, and 21 cultivars or lines confer resistant or intermediate responses to 4, 3, 2, and 1 strain of the pathogen, respectively. Sixty cultivars or lines elicited 12 different reaction types with the 5 strains of the pathogen. The cultivars or lines showing reaction type RRSSR were postulated that carry gene Rps1a or Rps1c. Line Nongda 3861 was inferred to possess gene Rps3c. The cultivars or lines showing reaction type SSSSS were deduced that have gene Rps7 or no resistant gene. Unknown genes were postulated to occur in the cultivars or lines that elicit the other reaction types. In Heilongjiang province, there are more plentiful soybean cultivars or lines resistant to Phytophthora root rot, and majority of the resistant cultivars or lines are effective to prevalent virulence of P. sojae, and can be used for Phytophthora root rot control.