摘要
为研究生选6号对黄淮麦区小麦赤霉病抗性改良效果,以黄淮麦区矮抗58、周麦25、周麦27、兰考161等4个主栽品种(系)为母本,以生选6号为父本,配制杂交组合,分别在长江中下游地区(上海崇明、安徽滁州)和黄淮地区(河南兰考)对4个组合F2群体进行赤霉病抗性鉴定。结果表明,4个组合的F2群体赤霉病抗性较感病亲本均显著提高,平均病小穗率在18.4%~31.2%之间,均达到中抗水平。4个群体的个体抗性级别主要集中在抗病和中抗,平均约占80%;而中感、感病和高感很少,平均占比20%左右。矮抗58/生选6号F2群体在滁州和兰考两个不同生态区域的抗性差异显著,虽然两地均达中抗水平,但滁州点抗性明显优于兰考点。主要表现为兰考点高感单株数是滁州点的7.4倍,中抗单株数却不到滁州点的1/2。同时,兰考点抗感比为65∶35,而滁州点为89∶19,这种现象应该与当年两地气候差异有关,可能黄淮冬麦区当年气候更适合赤霉病发病,也与长江中下游品种大多中抗以上而黄淮品种大多为高感品种的事实相一致。此外,抗性单株从F2到F3,发生了接近3∶1的抗感分离,F3抗性单株的平均病小穗率为20.2%,仍保持较强赤霉病抗性。上述结果表明,生选6号可以作为骨干亲本,广泛用于黄淮冬麦区小麦赤霉病抗性的改良。
In order to study the effect of Shengxuan 6 on the improvement of wheat scab resistance in Huanghuai wheat area,hybrid combinations were compounded by using four elite varieties. Aikang 58, Zhoumai 25,Zhoumai 27,and Lankao 161 in Huanghuai area as female parents and Shengxuan 6 as male parent. Four groups of F2 population were identified for scab resistance in the mid-lower Yangtze River plain（Chongming in Shanghai,Chuzhou in Anhui） and Huanghuai area（Lankao in Henan）. The results showed that the scab resistance of F2 population of four combinations was significantly im- proved than that of the susceptible parents,and the mean diseased spikelets rate was between 18.4% and 31.2% ,which reached the moderate resistance（MR） level. The resistance levels of the four groups were mainly centralized in the R and MR grades, accounting for about 80 %. The proportion of MS, S and HS level was very low,accounting for about 20%. The resistance of Aikang 58/Shengxuan 6 F2 population was significantly different in two different ecological regions（Chuzhou and Lankao）. Al- though the resistance both reached the MR level in two regions,the resistance in Chuzhou was significantly better than that in Lankao. The number of the HS single plant in Lankao was 7.4 times of that in Chuzhou,while the number for MR was less than half in Chuzhou. Meanwhile,the ratio of resistant to susceptible was 65 ： 35 in Lankao,but 89 ： 19 in Chuzhou. This phenomenon is probably related to the climate difference between two areas in 2015, when wheat scab in Huanghuai winter wheat area was more serious than that in mid-lower Yangtze River, and also corresponds to the fact that the scabresistance of most wheat cultivars in mid-lower Yangtze River are above MR, and that are HS in Huanghuai winter wheat area. Besides,the F3 population showed an approximate 3 ： 1 resistant to susceptible separation ratio, and the mean diseased spikelets rate of F3 resistant single plant was 20.2 %, which still maintained strong scab-resistance. In conclusion, Shengxuan 6 can be widely used to improve wheat scab-resistance as a core parent in Huanghuai winter wheat area.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2017年第12期1550-1554,共5页
Journal of Triticeae Crops
基金
国家公益性行业(农业)科研专项(201403039)
河南省重大科技专项(161100110400)
关键词
小麦
赤霉病
骨干亲本
生选6号
遗传改良
Wheat
Fusarium head blight
Core parent
Shengxuan 6
Genetic improvement
