wheat.itsuggestedthatthegeneticdiversityamongtibetanweedraceandxinjiangricewheatwerehigherthanthatofsichuanwhitewheatandyuanhulledwheat.rmarkerscanrevealmoregeneticvariatiowithinandbetweengrouthansts-pcrmarkers.thegeneticrelatiohiwithinandbetweengrouwereestimatedbyaupgmaclusteranalysisofgsmatrix.theresultsshowedthatall40landracescouldbedistinguishedbysts-pcrmarkersorrmarkers.twodistinctclustersareevidentfromthematrixbasedonsts-pcrandrdata.thefirstcoistsofall9xinjiangricewheatacceio.thesecondclustercoistsofallacceiofromsichuanwhitewheat,yuanhulledwheatandtibetanweedrace.theseresultssuggestedthatthexinjiangricewheatgroupwasgeneticallydistinctfromotherthreechineselandracegrou,whilesichuanwhitewheatgroupwasgeneticallyrelatedtoyuanhulledwheat.inthetibetanweedracegroupismorediversethansichuanwhitewheatandyuanhulledwheat,withsomeacceiomorerelatedtoyuanhulledwheat.
10.inthisstudy,'chinesering'hadidenticalgliadinandhmw-glutninpatterwith'chengdu-guangtou'.andthegeneticsimilarityof'chinesering'with'chengdu-guangtou',revealedbysts-pcrandrdata,washigherthanthatof'chinesering'withotherlandrace.thesewerefurthersuortstotheproposalthat'chinesering'isastrainof'chengdu-guangtou'.
11.thegeneticdiversityamong8wheatlandraceshighlyresistanttoheadscabnativetoguizhou,yuanandsichuan,and4wheatlineshighlysusceptibletoheadscabwereevaluatedbyrmarkers.the25rmarkers,usedinthisstudy,werelocatedon23chromosomearms,representingall21chromosomesofwheatgenomes,andrevealedatotalof74alleleswithmeanof2.96allele
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