Qinglian 521 is a new early-maturing tomato variety with unlimited growth,bred from D3-8-5 as the female parent and TB1430-3-7 as the male parent.This variety has strong growth potential,ordinary flowers and leaves and dark green leaves.The first inflorescence is borne on nodes 7-8,and the inflorescence is separated by 3 leaves.Medium-large fruit,young fruit has green shoulders,mature fruit is pink,round fruit,medium hardness,average single fruit weight is 223 g.The vitamin C content is 15.68 mg·100 g-1,the total acid content is 0.35%,the soluble solid content is 5.0%,the total soluble sugar is 3.48% and the lycopene content is 78.5 mg·kg-1.Fresh fruit is sour,sweet and delicious with excel-lent quality.It has certain resistance to tomato yellow leaf curl virus(TYLCV),cucumber mosaic virus(CMV),tomato mosaic virus(TMV),leaf mold,blight and root-knot nematodes,and has strong comprehensive resistance.This variety has good fertility,with an average yield of 7 563.4 kg·667 m-2.It is suitable for planting in early spring protected areas and overwintering greenhouses in Henan,Shandong,Hebei,Shaanxi and other places.
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