摘要
为提高小麦种子高活力优异组合的选配效率,选用种子活力水平有显著差异的天麦535(P_1)、新麦23(P_2)、现农1号(P_3)、西农889(P_4)、小偃22(P_5)和周麦18(P_6)6个小麦品种为材料,按照GriffingⅡ设计配制了15个杂交组合,对种子发芽率、发芽势、发芽指数、活力指数、电导率共5个种子活力性状进行配合力和遗传参数分析。结果表明,小麦种子活力主要受遗传因素控制。各种子活力性状一般配合力效应较高的亲本有P_6、P_5和P_4;P_2×P_5、P_3×P_5、P_3×P_6和P_4×P_5组合的特殊配合力较高;P_3×P_5、P_3×P_6、P_4×P_5、P_4×P_6和P_5×P_6组合的总体配合力较高;总体配合力可以作为高活力杂交组合评价的理论依据。发芽势、发芽指数和活力指数的遗传以加性效应为主,适宜早代选择;发芽率和电导率的遗传以非加性效应(显性效应及上位性效应)为主,适宜晚代选择。
In order to improve the matching probability of high vigor advantage combination in wheat seed. According to Griffing Ⅱ method,complete diallel crossing was designed using 6 wheat cultivars, Tianmai 535 （P1）, Xinmai 2 3 （P2）, Xiannong 1 （P3）, Xinong 889 （P4）, Xiaoyan 22 （P5） and Zhoumai 18 （P6） ,whose seed vigor were evidently different, compounded 15 cross combinations, germination potential,germination rate,germination index, vigor index and electrical conductivity, 5 characters were determined, Their combining ability and genetic parameter analyzed. The main results were as follows, different genotypes of wheat seed vigor traits existed significantly difference. The better parents of GCA was P6 ,P5 and P4; The better combinations of SCA was P2 × P5, P3 × P5, P3 × P6 and P4 × P5 ; The better combinations of TCA was P3 × P5, P3 × P6, P4 × P5, P4 × P6 and P5 × P6, TCA could provides a theoretical reference for evaluation high vigor cross combinations. Germination potential,germination index and vigor index by additive effects, so it should be selected in early generation; germination rate and electrical conductivity by non-additive effects, should be selected later.
出处
《麦类作物学报》
CAS
CSCD
北大核心
2016年第9期1167-1173,共7页
Journal of Triticeae Crops
基金
国家公益性行业(农业)科研专项(201303002)
国家科技支撑计划项目(2015BAD27B01)
陕西省科技统筹创新工程计划项目(2014KTZB02-01-02)
西北农林科技大学唐仲英育种基金项目(A212021204)
关键词
小麦
种子活力
配合力
遗传力
Wheat
Seed vigor
Combining ability
Heritability
