Characteristics of Resistance to Rice Sheath Blight of Zhongda 2, a Transgenic Rice Line as Modified by Gene “RC24”

(整期优先)网络出版时间:2004-04-14
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Thetransgenicrice,Zhongda2,whichwasgeneticallymodifiedfromanindicaricelineZhuxianBbyricechitinasegene(RC24),hadhighresistancetoricesheathblight(Rhizoctoniasolam)inlaboratoryandatwo-yearfieldexperiment.ThepathogencouldinvadesheathofZhongda2andinducesymptomsofthedisease.NodifferencewasnotedintimeofpenetrationorincubationperiodbetweenZhongda2andnon-transgenicricecontrol,ZhuxianB,butthehyphaelysatecouldbeobservedeadierthancontrol.Itsresistanceexpressedastoinhibitthegrowthofmyceliuminhosttissue.F1sfromZhongda2(♂)crossedwithotherfivenon-transgenicricelinesshowedhigherresistancethandonornon-transgenicparents,buttheresistancewasdifferentalongwiththedifferentmaternalparents.