Resistance of Hybrid Citrus Rootstocks to a Mediterranean Biotype of Tylenchulus semipenetrans Cobb

• Published in: HortScience Vol. 35; no. 2; pp. 269 - 273
• Main Authors: Verdejo-Lucas, S, Sorribas, F.J, Forner, J.B, Alcaide, A
• Format: Journal Article
• Language: English
• Published: Alexandria, VA American Society for Horticultural Science 01.04.2000
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; Pest animals; Pest resistance; Varietal selection. Specialized plant breeding, plant breeding aims; Hybrid variety; Citrus fruit; Rutaceae; Rootstock; Citrus; Pest; Dicotyledones; Tylenchulus semipenetrans; Angiospermae; Helmintha; Biotype; Pest resistance; Nemathelminthia; Spermatophyta; Intraspecific comparison; Invertebrata; Nematoda
• ISSN: 0018-5345; 2327-9834
• DOI: 10.21273/hortsci.35.2.269

The response of 52 citrus hybrid rootstocks to a Mediterranean biotype of Tylenchulus semipenetrans Cobb was determined in greenhouse tests. Seven selections of the cross `Cleopatra' mandarin [ Citrus reshni Hort. × Poncirus trifoliata (L.) Raf], and one of Citrus volkameriana Pasq. × P. trifoliata did not support nematode reproduction and were considered as highly resistant to the citrus nematode. The nematode showed very low infectivity and reproductive potential on seven additional selections of `Cleopatra' mandarin × P. trifoliata, one of `King' mandarin × P. trifoliata , and two C. volkameriana × P. trifoliata . These selections were considered as nematode resistant. All the selections with `Troyer' citrange [ Citrus sinensis (L). Osbeck × P. trifoliata (L.) Raf] in their parentage supported nematode reproduction but showed different levels of susceptibility.