Abstract:
Objective In order to explore the adaptability of cherry tomato (Solanum lycopersicum var. cerasiforme) germplasm resources, and evaluate the excellent cherry tomato breeding materials suitable for new varieties breeding in Yinchuan Plain area.
Method Totally 100 cherry tomato germplasm resources were collected as research objects, and the main phenotypic traits were determined. The adaptability was comprehensively evaluated by three different evaluation methods, multivariate statistical method, grey correlation analysis method and DTOPSIS method. The comprehensive score was calculated based on the principal component, the weighted correlation degree was calculated by the grey correlation degree method, and the relative proximity degree was calculated by the DTPOSIS method.
Result The coefficient of variation of the main phenotypic traits of 100 cherry tomatoes ranged from 17.78% to 306.46%, and there were significant or extremely significant correlations among most of the traits. The 26 phenotypic traits were integrated into 10 principal components, with a cumulative contribution rate of 71.901%. The ranking of various qualities under the three evaluation methods showed both uniformity and difference. A total of four materials were ranked in the top 10, namely, T55, T83, T42 and T87 under all three methods, indicating that T55, T83, T42 and T87 were excellent germplasms, and T55 was the best.
Conclusion T55 is the most suitable germplasm material for cultivation in Yinchuan Plain, and can be used as an important basic material for breeding. The evaluation results of the above three methods are slightly different, but there is no huge difference, which shows that the methods are feasible and beneficial to the research of germplasm resource evaluation.