Open Access

ARTICLE

Evaluation of Resistance of Different Kiwifruit Varieties (Lines) to Canker Disease and Brown Spot Disease

by Wenwen Su^1,#, Chongpei Zheng^3,#, Zhencheng Han², Chunguang Ren¹, Di Wu¹, Tao Li¹, Yi Yang¹, Weijie Li^2,*

1 Institute of Mountain Resources of Guizhou Province, Guizhou Academy of Sciences, Guiyang, 550001, China
2 Guizhou Botanical Garden, Guizhou Academy of Sciences, Guiyang, 550001, China
3 Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Institute of Agro-Bioengineering/College of Life Sciences, Guizhou University, Guiyang, 550025, China

* Corresponding Author: Weijie Li. Email:

Phyton-International Journal of Experimental Botany 2024, 93(6), 1249-1261. https://doi.org/10.32604/phyton.2024.051935

Received 19 March 2024; Accepted 10 May 2024; Issue published 27 June 2024

Abstract

Kiwifruit canker and brown spot are significant diseases affecting kiwis, caused by Pseudomonas syringae pathogenic variations (Pseudomonas syringae pv. Actinidiae (Psa)) and Corynesporapolytica (Corynespora cassiicola). At present, the research on canker disease and brown spot disease mainly focuses on the isolation and identification of pathogenic bacteria, drug control, resistance gene mining and functional verification. Practice has proved that breeding disease resistant varieties are an effective method to control canker disease and brown spot disease. However, most existing cultivars lack genes for canker and brown spot resistance. Wild kiwifruit resources in nature exhibit extensive genetic diversity due to prolonged natural selection, containing numerous resistance genes. But, due to insufficient understanding of the resistance of most kiwifruit varieties (lines) to canker disease and brown spot disease, some high-quality resources have not been fully utilized. The incidence of canker and brown spot of 18 kiwifruit cultivars (lines) was measured by inoculating isolated branches and leaves, and their resistance to canker and brown spot was analyzed according to the length, disease index, mean diameter, and systematic clustering. The results were as follows: Among 18 different kiwifruit varieties (lines) for canker disease, there were two highly resistant materials, eight disease-resistant materials, four disease-susceptible materials, and two highly susceptible materials. Moreover, regarding brown spot disease, there were one highly resistant material, five disease-resistant materials, four susceptible materials, and three highly susceptible materials. Furthermore, four resources were resistant to both diseases. The outcomes provided a theoretical basis for breeding kiwifruit against canker and brown spot.

---

Keywords

---