2023年全國碩士研究生考試考研英語一試題真題(含答案詳解+作文范文)_第1頁
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1、中國農(nóng)業(yè)大學(xué)碩士學(xué)位論文中國粳稻核心種質(zhì)耐低磷種質(zhì)篩選及水稻耐低磷脅迫QTL定位姓名:黃超申請學(xué)位級別:碩士專業(yè):作物遺傳育種指導(dǎo)教師:李自超20050501ABSTRACTModemagricultureisnowdevelopingwithlessCOUSUmptionandlesspollutionandmoreeffectiveThistrendrequiresthebreedertodevelopvarietesthatcar

2、ltransformandintakethedepositoftheunsolvedphosphorusinthesoilbyitsownmetabolismIntheseyearsthatselectingandbreedingsomecropswhichcarltoleratelowphosphorusbecomesoneoftheadvancedresearchtopicsInthisresearch,somegetypeswer

3、escreenedfrom366typesofriceinthefieldAtthesametimewelocatetheQTLsfortolerancetolowphosphorususingl16DHlinesand120RILlineswhicharemadebyIRATl09andYuefuThemainresultsarethefollowing:1Accordingtothisexperiment’sresult,wedev

4、elopedthescreeningmethodfotmdedbyformerandusedtheretativevaluesteplacetheabsolutevalLieastheindexforscreeningthelinestolerancetothelowphosphorusWeselectedthefollowingtraitastheindexesfortolerancetothelowphosphorus:Seedpe

5、rpanicleandcalculatedthemeanoftherelativevaluesofthefivetraitsastheindexofscreeninglinestolencetolowphosphorusIntheendwedevidedallthelinesby5groups:tolencetolo、Ⅳphosphorus,nonsensitivetolowphosphorus,mediumtype,subsensit

6、ivetolowphosphorus,sensitivetolowphosphorus50lineswhichcantoleratelow—phosphoruswereintheresult:ChimaoNiandaozi,Zhongjin984—02,eta1Andthereare5llineswhichissensitivetoIowphosphorus:Xiangdao,Jingxil7,Qingzal,eta1Intheothe

7、rlinesthereare85nousensitivelines,92mediumlinesand86sub—sensitive1ines2AnalysingtheRILpopulationwhichwasculturedinuplandbyQTLMAPPER16software,wegottheresult:thereisamaingeneticlociwasidentified,whichislocateelinthechromo

8、some5withLOD378additivevalue_00407andcontribution00208Therefire2maingeneticlociswhicharecalculatedbythebiomassbeyondthelandandlocatedinchrosome10andchromosome12withadditivevalue00738and00948。LOD27land344、contribution0085

9、9and01418Thereare4pairsofepistasislociswhicharecalculatedBytillingnumberonepairofepistasislociiscalculated:RM297RMll83inchromosomelandRMl231一RMl244inchromosome1withtotaladdifivevalueO0175totalepistasisvalue00271,totalcon

10、tributionbyadditiveenviromnantinteractionO0107totalcontributionbyepistasis。environmentinteraction0056Thereare3pairsofepistasislociswhichareaffectedbyheight,whichrespectivelyareRMI13一RM493inchromosomelandRMl261一RMl246inch

11、romosome12,RM87RMl61inchromosome5andOSR29RM201inchromosome9RMl62一RM454inchromosome6andRM560oSR22inchromosome7Thetotalcontributionofadditivesis0Thetotalcontributionofepistasisis01365Thetotalcontributionofadditivexenvironm

12、entis00033Thetotalcontributionofepistasis“environmentis025513AccordingtotheDHpopulationwhichwereculturedinuplandfor2yearsapakofepistasislociswerecalculatedbytillingnumber,whichareC246G292inchromosome5andR617$826inchromos

13、ome12TheLODofthemis464andthetotalcontributionoftheadditivesis0andthetotalcontributionoftheepistasisisO086,Thecontributionofadditivexenvironmentinteractionis0madthecontributionofepistatic。environmentinteractionisO3372TheD

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