Selection And Evaluation Of Fresh Tomato Varieties

In this paper,in order to select suitable for open fresh tomato varieties of Xin Jiang,according to the features of the climate in urumqi,Xin Jiang,consumption habits and so on,we introduced from different parts of the 127 fresh tomato varieties,planting and management in the same conditions,from fresh tomato yield,comprehensive quality and forage-livestock system three aspects carries on the preliminary screening before the 20 fresh tomato varieties.Through the use of principal component analysis,correlation analysis and membership function method to study the relationship between yield,comprehensive quality and commodity rate of different character indexes,comprehensive evaluation,the conclusion is as follows:(1)In terms of yield,‘Bei Bei’ had the highest yield per plant,which was 2.57 kg.The average weight of the 20 fresh tomato varieties with the highest yield per plant was 1.90 ~ 2.57 kg.The average yield per plant of other varieties ranged from 1.27 kg to 1.90 kg.In terms of comprehensive quality,‘Da Huang 1’had the highest comprehensive quality score of 1.15.The scores of the top 20 fresh tomato varieties with high comprehensive quality score ranged from 0.42 to 1.15.The comprehensive quality score of other varieties ranged from-1.1 to 0.41.The commercial rate of ‘Mi Zhi red tomato’ was the highest,100%.The commercial rate of the top 20 fresh tomato varieties with higher comprehensive quality score ranged from92.97% to 100%,and the commercial rate of the other tomatoes ranged from 21.61% to 91.89%.(2)Correlation analysis was conducted on the first 20 fresh tomato varieties,and it was found that average yield per plant and fruit weight had direct positive effects on stem diameter,fruit longitudinal diameter,flesh thickness,total acid content and vitamin C.Plant height,soluble solid content and total sugar content had direct negative effects,and other indexes had indirect positive or negative effects.The quality traits(soluble solid content,total sugar content,total acid content,lycopene,vitamin A,vitamin C)were directly affected by different traits and then indirectly affected the comprehensive quality.Leaf length,leaf width,node position of first inflorescence,lycopene,vitamin A,vitamin C and yield per plant had direct effects on commercial rate of fresh tomato.The above mentioned factors can be taken into consideration when selecting for breeding.(3)using the method of subordinate function,the average of subordinate function value is higher before five fresh tomato varieties,in turn,is ‘Beijing 10’,‘the Soviet tomato ’,‘Xin Feng 4’,‘red valente’‘tomato’,fruit characters,average yield,comprehensive quality of the ordinary,showing good forage-livestock system can be used as commercial tomatoes.This study using principal component analysis,correlation analysis and membership function method for comprehensive evaluation of fresh tomato varieties by comprehensive scoring value judgement about the pros and cons of fresh tomato varieties,select ‘Bei Jing 10’,‘the Soviet tomato ’,‘Xin Feng 4’,‘red valente’,‘tomato’,scored higher before five copies of fresh tomato varieties.Among the fresh tomato varieties preliminarily screened out from three aspects,there are still 3 varieties with more potential,which are ‘Xiang Fei 7’,‘Meng Tejiao 1’ and ‘Tian Mei 2’.Their average membership function value is relatively general,but they also have outstanding performance in yield,comprehensive quality and commodity rate.In addition,according to the correlation analysis among different traits,stem diameter,fruit longitudinal diameter,pulp thickness,total acid content and vitamin C had direct positive effects on fruit weight and average yield per plant.The quality traits(soluble solid content,total sugar content,total acid content,lycopene,vitamin A,vitamin C)were directly affected by different traits and then indirectly affected the comprehensive quality.Leaf length,leaf width,node position of first inflorescence,lycopene,vitamin A,vitamin C and yield per plant had direct effects on commercial rate of fresh tomato.To sum up,the effects of different traits on yield,comprehensive quality and commodity rate were combined to select suitable high-quality fresh tomato varieties for promotion.