利用雄性不育系及异型保持系配制萝卜三交种研究

Study on the Formulation of Triple Cross Combination of Raphanus sativus with Male Sterile Line and Heterotypic Maintainer Line

萝卜(Raphanus sativus L.)三交种对萝卜杂交优势及组合力测定的研究目前在国内外还很少开展,试验以4套萝卜核质互作型雄性不育系及10个父本自交系为试验材料,配制三交种及单交种组合,比较了三交种与单交种在产量、生物学性状、抗逆性、抗病性及耐抽薹性方面的差异。3年的试验结果表明,大部分三交种较单交种有抗病、高产的表现,配制的9组试验组合中,6组三交种产量高于单交种,增幅在2.6%～52.5%;抗病性方面三交种普遍强于单交种;而耐抽薹性与亲本特性密切相关。

The study on the three-way cross combination of Raphanus sativus L.in determination of hybrid heterosis and combining ability was rarely carried out home and abroad.The difference in production,biological characters,stress resis-tance,disease resistance and resistant bolting between triple cross combination and single cross hybrid combination was stud-ied using four sets of geno-cytoplasmic male sterile lines and 10 male parent inbred lines of R.sativus as the experiment materials.After 3 years of experiment,the results indicated： Most of the three-way cross combinations demonstrated better disease resistance and higher production when compared with single cross hybrid.In the 9 groups of experiment combination formulated,6 groups of triple cross combination had higher production from 2.6% to 52.5% when compared with single cross hybrid,while in disease resistance,three-way cross combinations were generally stronger than the single cross hybrid,and at the same time,the bolting resistance was closely related with parent strain characteristics.