馬鈴薯早熟組合重要農藝性狀的評價及分離趨勢的研究.pdf

1、Y7S5560國內圖書分類號：$532國際圖書分類號：學位論文密級杉f，以j卯；修6馬鈴薯早熟組合重要農藝性狀的評價及分離趨勢的研究許慶芬導師姓名：陳伊里(教授)申請學位級別：農學碩士專業(yè)名稱：作物遺傳育種論文提交日期：2005年4月27日答辯日期：2005年6月所在單位：東北農業(yè)大學授予學位單位：東北農業(yè)大學學位授予日期：答辯委員會主席：2005年6月EVALUATIoNoFIMPoRTANTAGRoNoMICTRAITSANDSEG

2、REGATIoNINEARIYCRoSSESOFPoTAToESABSTRACTTwentyoneearlymaturingcrossescoveringfourtypesofcrosswereobtainedfromseventeenearly—maturingvarietiessuchaSNEA一303andtenvarietiesandbreedinglineswithgoodcomprehensivetraitsGoodearl

3、y—mamdngparentsandcrosseswereevaluatedthroughanalysisofvarianceandDuncanstestSeparationtrendsofyieldcomponentsinseparatingprogeniesoftheseearly—maturingcrossesweredescribedInaddition，heritabilityfortencharacters(earlypro

4、ductionofm打ketabletubers，tuberweightperhill，tubernumberperhill，meantuberweight，specificgravity，eyedepth，skinsmoothness，skincolorfleshcolorandtubershape)WaScalculatedintheseedlinggenerationTheresultswereasfollowing：1Favof

5、itaandKE83YU64combiningearlyproductionofmarketabletubersofpreferredsizesandhighyieldwithgoodothereconomiccharacterswereselectedaSthemostsuitableforuseinbreedingforearliness3yKaczu“couldbeusedtobreedpotatowithspecialskinc

6、olorEarlyRosexFL1533，SuceessCaribeandKE83YU64xSnowdenwere3combinationswithgoodoverallevaluationEarlyRoseFLl533，JapanEarlyxKE83YU64and3yKBeKHflxHU90582werespecialcombinations，fromwhichsuperiorc[oneswithpurpleorredfleshcou

7、ldbeobtained2CorrelationsbetweenparentsandseedlinggenermionshowedthatsignificantpositivecorrelationsandhighsignificantpositivecorrelationsexistedforskincolorandtubershapeButdifferenceswerefoundforgeneticeffectsoftheparen

8、ts3FrequencydistributionsonyieldofmarketabletubersinallcrossestypesappearedsimilarandwereofaSymmetrywithmanypeaks，especiallyin20％and40％50％twoplacesItmaybeassumedthatheredityofpotatoearlyproductionofmarketabletubersiscont

9、rolledbytwomajorgenesandmanyminorgenestogethe￡Frequencydistributionsoftuberweight，tubernumberandmeantuberweightperhillweresimilarinallcrosstypesandwerecontinuallydecliningwithmajorityatthelowvalueGreateryieldadvantagesex

10、istedinthetypeofATbecauseofcombiningunlikeThereWaSgreaterhereditarydifferenceincontrollingtuberweightperhillindifferentfemaleparentsFrequencydistributionsofspecificgravityoftuberswereshowedinnormalandwereidenticalbaSical