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Acta Horticulturae Sinica ›› 2025, Vol. 52 ›› Issue (1): 51-65.doi: 10.16420/j.issn.0513-353x.2024-0077

• Genetic & Breeding·Germplasm Resources·Molecular Biology • Previous Articles     Next Articles

Studies on the Efficiency of GRFs/GIFs for Genetic Transformation and Regeneration in Grapevine

LI Min, LI Siyu, SHI Zihan, CHEN Shuang, XU Yan**(), LIU Guotian**()   

  1. Key Laboratory of Horticultural Plant Biology and Germplasm Innovation in Northwest China,Ministry of Agriculture and Rural Affairs,College of Horticulture,Northwest A & F University,Yangling,Shaanxi 712100,China
  • Received:2024-09-19 Revised:2024-11-15 Online:2025-01-25 Published:2025-01-18
  • Contact: XU Yan, LIU Guotian

Abstract:

In order to study the effect of GRF/GIF family genes on the efficiency of genetic transformation and regeneration,10 VvGRF and 4 VvGIF genes were identified in grape genome. VvGRF contains family conserved domains WRC and QLQ,VvGIF contains conserved domains SNH and QG. The regeneration of tobacco overexpressing VvGRF and VvGIF after one month of cultivation was significantly better than that the empty control. VvGRF8-GIF2 and VvGRF4-GIF2 are overexpressed in tobacco,and the regeneration efficiency is as high as 73.58% and 65.05%,which is 2.4-2.7 times that of control. Overexpression of rVvGRF8-GIF2VvGRF8-GIF2 after mutation of miR396 binding target site)showed the best regeneration efficiency,reaching 83.43%,which was 3.1 times that of control. Compared with the overexpression transformation of VvGRF8-GIF2 chimera,the promotion effect of constructed VvGRF8VvGIF2 homologous chimera VvGRF4-GIF2VvGRF5-GIF2 and VvGRF8-GIF3 after overexpression is relatively weak. According to the experimental results,VvGRF8 and VvGIF2 can improve the regeneration efficiency of plant genetic transformation.

Key words: grape, GRF, GIF, genetic transformation, regeneration