22个甜瓜品种农艺性状遗传多样性分析

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Abstract：To investigatethegeneticvariation inagronomic traitsof melongermplasmresources，screenhigh-quality germplasm，as wellasoferareferencebasis forgene miningand germplasm innovation，thisstudysystematicallyevaluated19mainagronomictraitsusing2cultivatedvarietisastestmaterials，ndconductedvariabilityoelationpriipal component，and clusteranalyses.Theresults showed thatthecoeficientof variation forthemajoragronomic traitsof 22 melon varieties ranged from 0.19% to 36.20% ，withthehighestvariationobservedinthenodeof the female flower 0 36.20% ，followedbythenodeof themale flower（ 32.63% ）.Correlationswere widely observed among the agronomic traits，withasignificantpositivecorrelationbetweenthesugarcontentofthemelonheartandthesugarcontentofthemelonflesh，andsinglefruitmassexhibitingsignificantpositivecorrelationswith fruitdiameter，fruitlength，fleshthickess， andseedcavitylength.Principalcomponentanalysiscategorizedthe19traits intoseveralcomponents，with thefirst3 principal components cumulatively explaining 60.79881% of the total variation. The first principal component included plantheight，maleand femalenodepositions，fruitlength，andseedcavitylength.Thesecond principalcomponentincludedfruit diameter，flesh thickness，andsingle fruit mass.Thethird principalcomponent included chlorophyllcontentand leaf nitrogen content.Clusteranalysis atagenetic distance of 0.Oo5 groupedthe22 materials into three groups.The first groupmainlyconsistedof medium-to-largesized，whiteskinned，netedmelonvarieties.Thesecondgroup inclued large-fruited，yow-snnedvarieties.Theirdgoupomprsedmedum-fruited，green-skinned，yellow-fleshdt melon varieties.Most of the materials within each group exhibited distinct phenotypic characteristics，demonstrating significant breeding potential.

Keywords：Melon;Germplasm resource;Agronomic trait;Genetic diversity

甜瓜（CucumismeloL.）为葫芦科（Cucurbitace-ae）黄瓜属（Cucumis）作物，是一种重要的经济作物，在我国具有悠久的栽培历史[。（剩余8066字）