小麥雌性不育系子房發(fā)育的觀察與分析.pdf

1、新疆農(nóng)業(yè)大學(xué)碩士學(xué)位論文小麥雌性不育系子房發(fā)育的觀察與分析姓名：楊晉彬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：作物遺傳育種指導(dǎo)教師：竇秉德曲延英20081101耨疆農(nóng)、亟大學(xué)碩￡學(xué)位論文傳孵析AbstractWheat(TriticumaestivumL)isoueofthemostimportantcropsintheworldThefemalesterileline4042derivedfromtheoriginalfemalesterilelin

2、eXND126，asanewmutant，couldbeprobablyusedinhybridwheatorapomixesbreedingasabasicmaterialThenowdaysresultsinthisfieldmainlyfocusedontheclassicalgeneticanalysisandQTLlocatingbySSRmarkerInthisstudyweprovidesomeovarymorpholog

3、icalandembryologyinformationofthefemalesterileline4042anditsoffspring，toshowthestructureandgeneticmechanismoffemalesterilityinwheatThemainresultisshowedasfollow：1Investigationswerecarriedoutabouttheyoungovarystructuresof

4、thewheatvarieties8901OrLiaochunNo10，andthefemalesterileline4042byparaffinsectionsTheresultsoftheobservationshowedthattheembryologicreasonsaboutthefemalesterilityinwheatwerevarious，the矗rstcasewasabnormaldoublefertilizatio

5、n，accountingforover50percent0fallobservation；thesecondwasvariousabnormalendospermevenifwithnormalpre—embryoAllofabnormalorfailureoftheovariesdevelopmentaccounted933percentThiswasthefirsttimetoshowtheembryologymechanismon

6、thefemalesterilityofwheat2ItwasalsoshowedthatthestructureofthehybridsFl(8901x4042，LiaochunNo10x4042)weresimilartotheirnormalparents，thisimpliedthatthefemalesterilityinwheatwasdominatedbymajorrecessivegenewhiletherewas46％

7、abnormalinFlovarythisconfirmedthatthefemalesterilityinwheatwasacomplextrait，implyingthatminorpolygenewithmajorgeneinvolvedinthefemalesterilephenotypedeterminationonembryologyview3Themorphologicalandweightdatasuchaslength

8、，widthandthicknessofovaryoffemalesterileline4042andvariety8901undernormalpollinationandun—pollinationconditionafterpollinationweretested，thedatashowedthattheovarycharacteroffemalesterilelineundernormalpollinationconditio

9、nwassimilartoitofline4042underunpollinationconditionandofvariety8901underanpollinationcondition，SOitcanbeinferredthatfemalesterilitymaybecausedbydoublepollinationdelayorendospermdevelopmentdelayandthismaybeconsistentwith