简介:通过对20世纪80年代以来具有代表性的华北夏谷区审(鉴)定的20个主栽谷子品种进行SSR标记多态性分析,研究了华北地区育成谷子品种的遗传多样性。49对引物在20个谷子品种中扩增出具有多态性的条带,共检测出142个等位变异,平均每个位点检测出的等位变异数为2.96个。标记位点多态性信息含量(PIC)变幅为0.0904~0.6896,平均为0.4168。20份材料间的遗传距离变幅为0.0173~0.9000,聚类分析将其分成3个类群,其中谷丰1号自成一类,表明谷丰1号的遗传距离较其他品种大。不同年代谷子品种间遗传距离分析结果显示,各年代品种之间的平均遗传距离由大到小依次是1980s>1990s>2000s>2010s,表明随着年代的递进育成品种的遗传差异减小,亲缘关系增近。
简介:Thispaperaimsatunderstandinghowpeopleexcludedfromtheconsumermarketendupinthecriminalmilieuasaviablesolutionforthem.Theliteraturereviewaddressesoneoftheaspectsofthecapitalistsystem,whichleadstoexclusionandsegregationinalargepartoftheconsumermarketpopulationand,thus,canengenderalienationandincursionintothecriminalworld.Weintendtoreferourstudytothemethodofarchivalethnography,sincethematerialofouranalysisispartofaresearchwithpeopleindeprivationofliberty.Theprocessofinterpretationmakesitpossibletounderstandthatthesegregatingdynamicsoftheconsumermarketisresponsiblebyanattemptofincludingpeople,eventhoughinanalienatedway,sincetheychosethecrimeinstead.
简介:Qualityofhighereducationisakeytonationaleconomicgrowthandsocialdevelopment.Internationalizationofhighereducationhasbeenoneofthemajornationaltrendsandgovernmentalagendasinmanyemergingcountriesinthepastfewyears.Internationaleducationistransformative.WithglobalizationandthedevelopmentoftheInternetofThings,internationalizationofhighereducationhasbecomeanimportantnationalgoalinChina.Thepurposeofthispaperisthreefold:(a)todescribeabriefhistoryofinternationalizationofhighereducationinChina;(b)toconceptualizethedualismofinternationalizationofhighereducation,theroleofthegovernment,andChina’s13thFiveYearPlaninChina;and(c)todelineatethechallengesandopportunitiesofinternationalcollaborations,especiallyinthedual-degreemodelunderinternationalpartnershipprogramsbetweenChinaandtheUnitedStates.
简介:anovelshouldbeahistory.FromtheintroductionofThomasHardyandthemaincontentofTessofTheD’urbervillesmustbehelpfultoshowusthebackgroundofClare’stragedy.,Chapter3TheoriginsofAngelClare’stragedy,哈代的悲剧小说《德伯家的苔丝》真实地反映了其当时的社会现实