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1、作物学报ACTAAGRONOMICASINICA2016,42(4):532539http://zwxb.chinacrops.org/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2016.00532羽衣甘蓝自交不亲和与自交亲和系种子萌发期DNA甲基化的动态变化11121,张旸胡中影赵月明李娜解莉楠12东北林业大学生命科学学院,黑龙江哈尔滨150040;黑龙江生物科技职业学院,黑龙江哈尔滨150025摘要:自交不亲
2、和系植株的种子往往出现退化现象,为了研究种子的退化现象是否与甲基化相关,因此本文采用#甲基化敏感扩增多态性(methylationsensitiveamplificationpolymorphism,MSAP)技术,以羽衣甘蓝自交不亲和系9种#子、自交亲和系14种子为研究对象,对其生长发育过程种子基因组DNA甲基化水平变化情况进行研究。采用改良#的CTAB法提取种子萌发不同时期DNA,然后通过MSAP分析、统计扩增条带,比较二者之间的差异。对9种子DNA甲基化状态分析表明,萌发前期(0~2d)发生甲基化位点数目持续增多,但萌发后
3、期(2~8d)发生去甲基化的数目#大量增加,整个萌发期去甲基化位点数目是甲基化位点数目的11倍,说明9种子萌发过程中DNA甲基化修饰是基##因表达的重要调控方式之一;在相同发育时期,9在总甲基化、全甲基化、半甲基化水平上均不同程度高于14。随###着种子的萌发,9全甲基化水平明显上升,半甲基化水平几乎不变,而14变化趋势与9相反,半甲基化水平明显上升,全甲基化水平几乎不变。关键词:羽衣甘蓝;自交不亲和性;自交亲和性;DNA甲基化DNAMethylationDynamicAnalysisofSelfCompatibleLinean
4、dSelf-Incom-patibleLineofBrassicaoleraceavar.acephalaatSeedGerminationStage11121,ZHANGYang,HUZhong-Ying,ZHAOYue-Ming,LINa,andXIELi-Nan12CollegeofLifeSciences,NortheastForestryUniversity,Harbin150040,China;HeilongjiangVocationalCollegeofBiologyandTechnology,Harbin150
5、025,ChinaAbstract:Theseedofself-incompatiblelineoftendegraded.Thisstudyaimstoclarifytherelationshipbetweenthedegradationoftheseedsandmethylation.Inthisexperiment,methylationsensitiveamplificationpolymorphism(MSAP)wasusedtostudy#thestatusandpatternsoftheDNAmethylation
6、atdifferentperiodsinseedgerminationofself-incompatibleline9and#self-compatibleline14.TheimprovedCTABmethodisadoptedtoextractseedgerminationindifferentperiodsofDNA,and##thenthroughtheMSAPanalysis,statisticalamplificationbands,comparethedifferencesbetween9and14.Theresu
7、ltsare#shownasfollows:DNAmethylationmodificationthroughoutthewholeprocessofseedgerminationof9,attheearlystageofthegermination(0to2days)methylationsitescontinuedtoincrease;atthelaterstage(2to8days)demethylationincreasedappar-ently,andeventuallythenumberofdemethylation
8、was11timesmorethanmethylation.ItwasprovedthatDNAmethylation#modificationwasanimportantwaytoregulatethegeneexpressionduringseedgermi