低糖优质西瓜品种三白1号的选育

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Breeding of a low-sugar， high-quality watermelon cultivar Sanbai No. 1

ZHANJunhua'，DUAN Zhenjiao'，LIU Shiwei²， TANGPing （1.Minqnuaeoega tryCodo Abstract：SanbaiNo.1watermelonisanewlow-sugar，high-qualityvarietydevelopedthroughsystematicimprovement ofalocallandrace in Minqin， Gansu province.This variety was obtained via thre years offive-generation selfing，purification，anddirectionalselectiontostabilizetraits.Underspringoen-fieldcultivationinMinqin，Gansu，itstotalgrowth period is104 days，with fruit development duration of 44 days.The plant exhibits vigorous growth，but vine vigor declinesafter seting fruit.The firstfemale floweroccurs atthe 6th-8th node，with subsequentfemaleflowers emerging every2nd-3rdnode，it iseasyforseting fruit.Thefruit is sub-rounded，withalight whiterindlacking stripesor wax powder. The rind thickness is 2.2cm ，characterized by moderate firmness and excellent storage potential. The milky white flesh is tender，juicy，and refreshing，ofering superior taste and aroma.Soluble solids content reaches 6.0% in the center and 4.8% at the edge，demonstrating a minimal sugar gradient between the core and periphery.Seeds are enclosed in white seed coats.Thevarietyshows moderate resistance to Fusarium wilt，cold tolerance，and susceptibility to waterlogging. Single fruit average mass is 1.6kg ，withayieldof approximately 3460kg per 667m2 .It issuitable for spring open-fieldcultivation insimilar comparable regions ofGansu，Innerongolia，Xinjiang，Shaanxi，andNingxia.

Keywords：Watermelon;Newcultivar; SanbaiNo.1;Systematic breeding

1育种目标

西瓜作为一种重要水果，在我国各地广泛分布[1-3]，甘肃民勤地处巴丹吉林和腾格里两大沙漠腹地，光热资源丰富，昼夜温差大，气候干燥少雨，生产的瓜果含糖量高、口感好、风味佳，深受消费者喜爱。（剩余4516字）