馬鈴薯早熟組合重要農(nóng)藝性狀的評(píng)價(jià)及分離趨勢的研究.pdf

1、Y7S5560國內(nèi)圖書分類號(hào)：$532國際圖書分類號(hào)：學(xué)位論文密級(jí)杉f，以j卯；修6馬鈴薯早熟組合重要農(nóng)藝性狀的評(píng)價(jià)及分離趨勢的研究許慶芬導(dǎo)師姓名：陳伊里(教授)申請(qǐng)學(xué)位級(jí)別：農(nóng)學(xué)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(nóng)業(yè)大學(xué)授予學(xué)位單位：東北農(nóng)業(yè)大學(xué)學(xué)位授予日期：答辯委員會(huì)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