兩極型光溫敏小麥不育系337S的不育性遺傳及其花粉敗育的細胞學(xué)研究.pdf

1、華中農(nóng)業(yè)大學(xué)碩士學(xué)位論文兩極型光溫敏小麥不育系337S的不育性遺傳及其花粉敗育的細胞學(xué)研究姓名：程旭東申請學(xué)位級別：碩士專業(yè)：作物遺傳育種指導(dǎo)教師：孫東發(fā)20030501InheritanceofMaleSterilityandCytologicalCharacteristicsofPollenAbortioninBipolephoto—thermo～sensitive融leSterileLine337SofWheat(Taestivu

2、m)ChengXu—dongAbstractBi——polephotothermosensitiveMaleSterileLine337SofWheatwassensitivenotonlytoshortday”lengthandlowtemperaturebutalsotolongday—lengthandhightemperatureThegeneticmechanismoffertilityexpressionbyinvestig

3、ationthe337S，7differentwheatvarietiesandtheFl，F(xiàn)2，BCIhybridswhichwerecrossedby337S／7wheatvarietieswasstudiedinthisthesis。TheresuitsshowedthattheF1generatienswereferti1eThatistosaythefertilityinheritanceof337Swascontrolled

4、bythenuclearandhadnorelationwithcytoplasmicgenes，Inthemajorityofvarietiestests，thepropagationratiooffertileandsterileplantsintheF2generationof337Sand5wheatvarietiesinshortday—lengthandlowtemperature張s3：1Intheothertwocomb

5、inationstheratiois15：l。Thatmeanthemalesterileheredityof337Swascontrolledby2pairsofrecessivegenesDifferentvarietieshavedifferentpartsofrestoringgenes：somehave1pair，somehave2，Inlongday—lengthandhightemperature，allthepropag

6、ationratiosof辯were15：1，andofBClwere3：l，Theseshowedthemalesterilehereditywascontrolledby2pairsof1inkedrecessivegenesintheconditionAnother10maincharactersstudiedineluded：headingdate，plantheight(cm)，ear—length(cm)，spikeletn

7、umber／ear，titlernumber／plant，paniclesperplot，1000一grainweight／gandothers。A11mainpaniclesoftheplotswerebaggedbeforeflowering，andfilledspikeletswerecounted。Correlationanalysisbetweenthemaintrainsandfertiletraitsweremade，th

8、eresultsshowedthatinshortday一1engthandlowtemperaturecendition，fertiletraiteffectivetillerswithheadingdateThecorrelationofthespikeletnumber，1000一kernelweightandthefertilewerenegativewhentheenvironmentwaslongdayandhightemp