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1、東北農(nóng)業(yè)大學(xué)碩士學(xué)位論文部分CIMMYT玉米群體改良系組配雜交種的改良效果分析姓名：孫艷杰申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：作物遺傳育種指導(dǎo)教師：金益20070620AnalysisonImprovementEffectofCombinationswithImprovedInbredsUsingCIMMYTMaizeGermplasmAbstractIntroductingexoticgermplasmwasalleffectivewaytoim

2、provehereditarybasisofmaizegermplasminChinaandtoenrichhereditarybasisofavailableinbredsThetropicandsubtropicgermplasmfromClIVlMYThavehighercombiningabilityandheterosis，buttheyweredifficultyutilizedinhighlatituderegionsuc

3、hasHeilongjangprovincebecauseofphotoperiodsensibilityneyshouldbeimprovedthroughmakingsemiexoticgermplasmw曲localinbedsThehybridsDengnon9250Donguen9251andLongdanl3we嵋plantedwidelyintheNo2andNo3accumulativetemperaturezoneof

4、HeilongiiangProvinceInthisstudytheparentsofthesehybridsWeIOusedtomakingsemiexoticgermplasmandsomeimprovedinbredswereselectedfromthemSomecombinationsoftheseimprovedhibredswiththeotherparentsweremadeandtestedinfieldSomelin

5、esfromCIMMYTgermplasmPobl01weregrossedwithoneoftheparentsaboveandalsotestedinfieldTheyieldandsomeagronomictraitswefeeompar酣witlIoriginalhybridsandtherelationshipamongttle踱traitsw讎studiedbycorrelationandpathanalysistoguid

6、etheimprovementandutilityofexoticgemaplasmespeciallyCIMMYTgennplasminHeilongiiangwovinceThemainresultswereasfollowed：1TheperformanceofcombinationsofimprovedinbredsselectedfromsemiexoticgermplasmbyintroducingCIMMYTgermpla

7、smPob45tothepamainbredsofhybridsinHeilongjiangprovincecrossedwiththeotherparentsWerevario惜Thcyieldof167％combinationsoftheimprovedHe344’sfromsemiexoticgerraplasmaccessedwithPclb45andimprovementHe344(thefemaleparerofDongno

8、n9251)crossedwithDon98112(themaleparentofDongnon9251)WemhigherthantheCKvarietyDongnon9251Theyieldof333％combinationsoftheimprovedJi846’SfromsemiexoticgermplasmintroducedPob45andKIO(thefemaleparentofLomgdanl3)crossedwithim

9、provedJi846(themaleparentofDongnen9250)werehigherthantheCKvarietyOonguon9250Buttheyieldofcombinationsof444(thefemaleparentofDongnon9250)cmssedwiththeimprovedJi846wemnthiigherthanCKDongnon9250Agrononmictraitsofcombination

10、swhichparentalinbredscaHlefromsemigermplasmintroducedPob45werehighlyimprovedTheplantheightandearheightofcombinationswithimprovedJi846wereIoweTthanCKvarietyTasselramificationnumbers。leafareaofwholeslrain、shellingpercentag

11、e，100kemalweighthadapparentlyimprovedeffectsinpartialcombinationsTheplantheightearheighttasselramificationnumbersofcombinationswithimprovedHe344WassignificantlyimprovedTherefore，ThePob45wereusedtoimproveyieldandcorrelati

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