Inheritance of glandular trichomes and two-spotted spider mite resistance in cross Lycopersicon esculentum ''Nandi'' and L. pennellii ''LA2963'

• Published in: Euphytica Vol. 154; no. 1-2; pp. 231 - 238
• Main Authors: Saeidi, Zarir, Mallik, B, Kulkarni, R. S
• Format: Journal Article
• Language: English
• Published: Dordrecht Dordrecht : Kluwer Academic Publishers 01-03-2007; Springer; Springer Nature B.V
• Subjects: acylsugars; Agronomy. Soil science and plant productions; Araneae; Biological and medical sciences; crossing; Fundamental and applied biological sciences. Psychology; Genetics and breeding of economic plants; glandular trichomes; heritability; inheritance (genetics); interspecific hybridization; Lycopersicon esculentum; Lycopersicon pennellii; Mites; pest resistance; plant age; plant breeding; Plant growth; Planting density; progeny; recessive genes; Solanum lycopersicum var. lycopersicum; Solanum pennellii var. pennellii; Spiders; sugars; Tetranychus urticae; tomatoes; trichomes; Varietal selection. Specialized plant breeding, plant breeding aims; wild relatives; Tetranychidae; Glandular trichomes, Inheritance; Lycopersicon; Spider mite; Genetic determinism; Trichome; Acariformes; Arachnida; Pest; Tetranychus urticae; Acari; Vegetable crop; Actinedida; Arthropoda; Dicotyledones; Angiospermae; Genetic improvement; Lycopersicon esculentum; Pest resistance; Spermatophyta; Solanaceae; Invertebrata
• ISSN: 0014-2336; 1573-5060
• DOI: 10.1007/s10681-006-9291-4

Parents and their F₁ and F₂ progenies were evaluated for density of type IV glandular trichomes and resistance to Tetranychus urticae Koch during three stages of the plant growth. Results indicated significant differences between density of type IV glandular trichomes on F₁ and F₂ populations at different sampling times. As age of plant increased, density of type IV glandular trichomes and resistance to two-spotted spider mite increased. Density of type IV glandular trichomes on F₂ individuals showed a broad range of variability (0-42 trichomes/mm²). The estimated heritability was very high (>85%) for damage score and density of type IV glandular trichomes at different sampling times. Acylsugars content in Lycopersicon pennellii ''LA2963'' was more than two-folds high than those found in L. esculentum ''Nandi'', F₁ and F₂ populations, indicating that recessive gene(s) are responsible for the high acylsugar contents in L. pennellii ''LA2963''.