ACTA AGRICULTURAE BOREALI-SINICA ›› 1991, Vol. 6 ›› Issue (4): 30-35. doi: 10.3321/j.issn:1000-7091.1991.04.006

Special Issue: Oil crops

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Utilization of Wild Erectoides Species in the Genus Arachis for the Improvement of the Cultivated Groundnut——Ⅰ. Resistance to Groundnut Rust and Leaf Spots

ZhangXinyou   

  1. Industrial Crop Institute, Henan Academy of Agricultural Sciences,Zkengzhou 450002
  • Received:1990-10-01 Published:1991-12-28

Abstract: Eight wild Arachis accessions, 6 from section Erectoides and 2 from section Arachis, were evaluated under laboratory conditions for their reactions to groundnut rust (Puccinia arachidis Speg. ) and leaf spots (Cercospora arachidi-cola Hori and Cercosporidium personatum (Berk, and Curt. ) Deighton) , with a cultivar as check. Five components of resistance were investigated, which included infection frequency, lesion diameter, defoliation, damaged leaf area and sporulation index. All the wild accessions used were immune to rust. Among the 6 Erectoides accessions, three did not develop any late leaf spot symptom, and showed hypersensitive reaction to early leaf spot pathogen; the other three were also found to have appreciable level of resistance to both leaf spot diseases under high inoculum pressure. The 2 representatives of section Arachis as well as the cultivar were, however, heavily infected by the two leaf spot pathogens under the same conditions.

Key words: Arachis, Erectoides, Wild species, Disease resistance, Rust, Leaf spots

Cite this article

ZhangXinyou. Utilization of Wild Erectoides Species in the Genus Arachis for the Improvement of the Cultivated Groundnut——Ⅰ. Resistance to Groundnut Rust and Leaf Spots[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1991, 6(4): 30-35. doi: 10.3321/j.issn:1000-7091.1991.04.006.

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