冬小麦新品系‘93保4-4’对条锈菌及白粉菌苗期抗性的遗传分析  

Inheritance of resistance of new wheat line '93 bao4-4' against stripe rust and powdery mildew at seedling stage

作　　者：曹世勤[1,2] 骆惠生[2] 武翠平[3] 黄瑾[2] 贾秋珍[2] 张勃[2] 王晓铭[3] 朱振东[3] 金社林[2] 尚勋武[1] 

机构地区：[1]甘肃农业大学农学院,甘肃兰州730070 [2]甘肃省农业科学院植物保护研究所,甘肃兰州730070 [3]中国农业科学院作物科学研究所,北京100089

出　　处：《甘肃农业大学学报》2010年第2期38-41,45,共5页Journal of Gansu Agricultural University

基　　金：国家"十一五"科技支撑计划(2006B08AD);国家公益性(农业)行业专项(3-15)

摘　　要：2006-2009年,以小麦新品系‘93保4-4’作父本,‘铭贤169’作母本进行杂交,以F1代自交系获得的F2代材料,在苗期分别接种条锈菌主要流行小种‘条中29号’‘条中32号’‘条中33号’‘水11-4’‘水11-7’及白粉病菌‘E05’‘E09’进行抗性遗传分析.结果表明:接种‘条中29号’,F2代植株抗感分离比为170∶16,卡方测验值χ2c为1.43小于χ20.05,1(3.84),符合理论比值15∶1;接种‘条中32号’‘条中33号’‘水11-4’‘水11-7’,F2代植株抗感分离比分别为126∶23、139∶31、273∶51和118∶32,均符合理论比值13∶3,卡方测验值χ2c分别为1.22、0.06、2.05、0.56,均小于χ20.05,1(3.84).接种‘E05’和‘E09’,F2代植株抗感分离比分别为31∶117和32∶147,均符合理论值1∶3,卡方验测值χ2c分别为0.12和0.73,均小于χ20.05(3.84).据此推知新品系‘93保4-4’对条锈菌‘条中29号’的抗性由2对独立遗传的显性抗性基因控制,对‘条中32号’、‘条中33号’、‘水11-4’、‘水11-7’的抗性均由2对相互作用的显性抗性基因控制;对白粉菌‘E05’和‘E09’的抗性均由1对隐性抗性基因控制.New wheat line ＇93 bao 4-4＇ from southern Gansu,China,was used as male parent and hybridized with the susceptible cultivar ＇Mingxian 169＇ from 2006-2009.To study the inheritance of the resistance in seedling plants,the F_2 populations of the crosses were inoculated with five stripe rust races ＇CYR29＇＇CYR31＇＇CYR32＇＇CYR33＇＇Shui11-4＇＇Shui11-7＇ and two powdery mildew isolates ＇E05＇ and ＇E09＇,respectively.The results showed that the segregation ratio for the cross of ＇93 bao 4-4＇ and ＇Mingxian 169＇ were 170∶16 in F_2 plants when tested with ＇CYR29＇,which accorded with the expected value for 15R∶1S in Chi-square（χ2_c） testing for probability of goodness fit.When tested with ＇CYR32＇,＇CYR33＇,＇Shui11-4＇ and ＇Shui11-7＇,the segregation ratio for the cross of ＇93 bao 4-4＇ and ＇Mingxian 169＇were 126∶23,139∶31,273∶51 and 118∶32,which accorde with the expected value for 13R∶3S in Chi-square（χ2_c） testing for probability of goodness fit.The segregation ratio for the cross of ＇93 bao 4-4＇ and ＇Mingxian 169＇ were 31∶117 in F_2 plants when tested with ＇E05＇,which accorded with the expected value for 1R∶3S in Chi-square（χ2_c） testing for probability of goodness fit.The test with ＇E09＇ got similar result.The F_2 plants segregated as 32R∶147S.The Chi-square（χ2_c） testing with probability（P） for goodness fits the expected value 1∶3.The results indicate that the resistance of wheat line ＇93 bao4-4＇ was controlled by two dominant genes to CYR29.The resistance to stripe rust race ＇CYR32＇,＇CYR33＇,＇Shui11-4＇ and ＇Shui11-7＇ were controlled by two dominant genes which expressed by inhibiting effect.The resistance to powdery mildew was both conferred by one recessive gene.

关 键 词：小麦 条锈菌 白粉菌 抗性遗传 

分 类 号：S512.134[农业科学—作物学]