Breeding Of Pink And Cherry Tomato Inbred Lines And Elite Hybreds

Tomato is a kind of vegetable with high yield and economic benefit.The types of cultivated tomato include red tomato and pink tomato.Pink tomato is generally better than red tomato in quality,more attractive to consumers.The breeding of pink tomato as fruit firmness,crack resistance and disease resistance are lagged comparing witn red tomato breeding,Also,the germplasm resources and disease resistance are not so rich as red tomato.Cherry tomato is rich in color and shape,has good taste with a special flavour.The stability and uniformity of the domesticated tomato varieties are poor,and the quality is not high.This study is based on the materials of our laboratory and the new introduction of tomato germplasm materials,the breeding of inbred lines and excellent cross with molecular marker assisted selection and evaluation of agronomic characters in the field,to lay a solid foundation for the breeding of noval cultivars.The results are as follows:1.Breeding of pink tomato inbred lines:Combined with molecular markers of disease resistance and molecular markers of quality and with investigation of agronomic characters in the field,we confirmed that 47 inbred lines with Ty gene,27 inbred lines with Mi gene,58 inbred lines with I-2 gene,34 inbred lines with Ve-2 gene,47 inbred lines with Cf-9 gene,45 inbred lines with Tm-2a gene,11 inbred lines with 5 disease resistance genes,6 inbred lines with 6 disease resistance genes,3 inbred lines with 7 disease resistance genes.We confirmed that 54 inbred lines are special aroma genotype,and 29 inbred lines are high malic acid genotype,10 inbred lines with good comprehensive characters.We have obtained 6 inbred lines with high flesh firmness,12 inbred lines no fruit cracking,5 inbred lines weight per fruit overall 200 g.We obtained 6 populations of BC2,13 populations of BC1 and 8 F1 populations,with late blight Ph-3 resistance.2.Breeding of pink tomato hybrids:Compared 92 crosses in spring and autumn,8 crosses exhibit a comprehensive excellent performance:FN31,FY45,FY59,FY24 and FY57.FN31 and FY59 are excellent hybrids with strong fruit setting ability and seldom crack and big fruit size.FY24 has strong fruit setting ability.3.Breeding of cherry tomato inbred lines:As same as the breeding method of pink tomato inbred lines,we confirmed that 18 inbred lines with 5 disease resistance genes,13 inbred lines with 6 disease resistance genes,5 inbred lines with 7 disease resistance genes,68 inbred lines with Ty gene,36 inbred lines with Mi gene,47 inbred lines with ph-3 gene,56 inbred lines with I-2 or I-3 gene,28 inbred lines with Ve-2 gene,49 inbred lines with Cf-9 gene,42 inbred lines with Tm-2a gene.We confirmed that 34 inbred lines are special aroma genotype,and 69 inbred lines are high malic acid genotype.We have got 5 inbred lines with high flesh firmness,9 inbred lines with spreading sepal,4 inbred lines with high soluble solid content,8 inbred lines with good comprehensive characters were selected.4.Breeding of cherry tomato hybrids:Compared 78 cross in spring and autumn,7 crosses exhibit a comprehensive excellent performance:Y6,YG29,YG5,YG4 and YG20.Hybrid Y6 is excellent with high soluble solids content,the fruit is crisp and sweet with slightly sour.YG29 is an excellent hybrid with spreading sepal and seldom crack,strong fruit setting ability and high soluble solids content.Hybrids of YG5,YG4 and YG20 exhibit an excellent performance with fruit firmness and spreading sepal and fruit setting ability.