TITLE:
Genetic Parameters and Correlation between Tomato Late Blight Field Resistance and Fruit Quality
AUTHORS:
Carlos Nick, Jorge Gonzalez Aguilera, Bruno Soares Laurindo, Victor de Souza Almeida, Renata Dias de Freitas, Cosme Damião Cruz, Derly José Henriques da Silva
KEYWORDS:
Pre-Breeding, Alleles Introgression, Genetic Resources, Tomato Wild Species
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.5 No.15,
July
18,
2014
ABSTRACT:
The objective of this study was to estimate genetic parameters and
quantify the correlations between late blight (LB) resistance and fruit quality
traits in 220 families F2:3, under tropical field conditions. The
families were arranged in randomized blocks in field trials, with six resistant
inbred lines used as control, in plots of five plants. It evaluated the
severity in the middle of the epidemy, final severity, area under the curve of
progress of late blight, pH, total soluble solids, titratable acidity and
flavor. There is genetic variability for epidemiological variables and total
soluble solids. Heritabilities, obtained by parent-offspring regression, were
high and indicated the possibility of satisfactory genetics gains and success
in the introgression of resistance alleles. The correlations were negative, of
high to intermediate magnitude, among the variables area under the curve of
progress of late blight, total soluble solids and total titratable acidity.