Effects of hetero-plastic graft on fruit traits and cross compatibility of tomato

WANG Shuai

doi:10.16861/j.cnki.zggc.2024.0554

Abstract：In order to provide a theoretical basis for graft hybridization and directional regulation of grafting,this study analyzed and compared the divergence change of the shape,the stem diameter,the number of ventricles,the content of sol-uble solids in tomato fruit and cross compatibility by using wild tomato Solanum pimpinellifolium Solanum cheesmanii,Yuanwei No.1 as root-stock and scion,respectively. The results showed that,less effect on the shape of Solanum pimpi-nellifolium,Solanum cheesmanii and Yuanwei No.1 fruit when forward and reverse hetero-plastic grafting. But there were a notable impact on the swamp of stem,the number of sepal and the soluble solids content of Yuanwei No.1. The swamp of stem had 28.93％ drop and the number of sepal had 14.99％ drop when reverse hetero-plastic grafting between Sola-num cheesmanii and Yuanwei No.1. The soluble solids content of Yuanwei No.1 decreased 1.20 and 2.17 percent points when it forward and reverse hetero-plastic grafting with Solanum cheesmanii. And there were a notable impact on the seed quantity of per fruit and thousand seed weight of Yuanwei No.1. Solanum pimpinellifolium could markedly reduce the number fruit ventricle and the seed quantity of per fruit of Yuanwei No.1. Solanum cheesmanii could markedly increase the number fruit ventricle and the seed quantity of per fruit of Yuanwei No.1. The fructification of tomato distant hybridization was been improved when solanum cheesmanii,Solanum pimpinellifolium interspecific grafting with Yuan-wei No.1. The number of Yuanwei No.1 seed was more when using Yuanwei No.1 as root-stock. Most seeds had been got when Yuanwei No.1 grafting with Solanum cheesmanii. The number was 24. The colour of the seed coat of Solanum lycopersicum was changed into puce when grafting with Solanum cheesmanii,the proportion was 46％.