長爪沙鼠毛被特征及毛周期波的研究.pdf

1、分類號Q78學校代碼10129UDC577學號08210015長爪沙鼠毛被特征及毛周期波的研究StudiesonCoatacteristicsHairCycleWavesofMongolianGerbils申請人：黃瑤學科門類：理學學科專業(yè)：遺傳學研究方向：動物分子遺傳學與基因組學指導教師：尹俊教授論文提交日期：二〇一一年五月StudiesonCoatacteristicsHairCycleWavesofMongolianGerbils

2、AbstractAnimalhairfolliclesgrowwithcyclicregenerationmousehairfolliclesregeneratewiththepatternofgroupsfmthehaircycledomainshaircyclewaves.Eachdomainshasitsownregenerationrhythmcanberesetbyphysiologicaleventssuchaspregna

3、ncylactation.Itisnotclearwhetherthewildrodentshavehaircycledomainshaircyclewaveslikemouse.ThisstudyusedMongoliangerbilsasexperimentalmaterials.Byclippingthecoathairanalyzingthecoloftheskinwecanobservethefmationprocessofr

4、egenerativehairwavescomplexhaircycledomainsinlivinganimals.MeanwhilechangesofthehairwavesinMongoliangerbilsduringdifferentseasonstheeffectsofphysiologicaleventsthemechanicaldamageswerestudiedinthispaper.Inthisstudythecom

5、plexhaircycledomainpatternsinthedsalskinofMongoliangerbilsweredescribedthestructurecyclicchangesoftheskinhairfollicleswereshownbymakingsections.Thisstudygottheconclusionsareasfollowing:(1)Thesixtypesofhairhavebeenfoundin

6、thecoatofMongoliangerbilsWhichincludedwhiskerGuardhairAwlhairAuchenehairZigzaghairtailhair.TheAwlhairtakesmajityofeachpartofthegerbilscoat(39.07%63.54%).(2)ThedsalcoatoftheMongoliangerbilsisbrownishyellowthedsalhaircycle

7、patternprogressisaccdingasthefollowingstages:Duringthefirsthaircyclehairfolliclesinthedsalskinappeartocyclesynchronously.Asaconventionhairfolliclesinthedsalskinfrompostnatalday1toapproximatelyday20areusedtorepresentanage

8、nthentheygraduallyentertelogenafterday20.Thewhiskerhasgrowthoutatbirththecoatgrowsoutatpostnatalday10.Atapproximatelypostnatalday40theystarttoenterthefirsttruepostnatalanagenlastinguntilaroundday50.Asthisanagenhaircycles

9、passdifferenthizontalsegmentsstarttosplitintoonecentraltwolateraldomainsthatcycleindependently.ThecentraldomaincanbeinphasewiththetwolateraldomainsofthesegmentanteriposteritoitthusfmingaVshapedinvertedVshapedzone.Afterth

10、efourthhaircyclesthereareislsofgrowthonthedsum.Generallypatternsincreaseincomplexitywithage.Butsometimesthelinearhaircycledomainpatternshaveprogressinglikethewaterwaveduringallthegerbilslife.Onthedsumthereisanewcenterofa