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Genetic Parameters and Correlation between Tomato Late Blight Field Resistance and Fruit Quality

American Journal of Plant Sciences 2014年第15期5卷 2418-2425页

作者： Carlos Nick Jorge Gonzalez Aguilera Bruno Soares Laurindo Victor de Souza Almeida Renata Dias de Freitas Cosme damiao Cruz derly jose henriques da silva Departamento de Fitotecnia Universidade Federal de VicosaVicosaBrazil Embrapa Trigo Passo FundoBrazil Departamento de Biologia Geral Universidade Federal de VicosaVicosaBrazil

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.

关键词： Pre-Breeding Alleles Introgression Genetic Resources Tomato Wild Species

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Comparative Proteomics Reveals Set of Oxidative Stress and Thaumatin-Like Proteins Associated with Resistance to Late Blight of Tomato

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American Journal of Plant Sciences 2018年第4期9卷 789-816页

作者： Bruno Soares Laurindo Renata Dias Freitas Laurindo Patrícia Pereira Fontes Camilo Elber Vital Fábio Teixeira Delazari Maria Cristina Baracat-Pereira derly José henriques da silva Department of Phytotechny Federal University of Vi&ccedil osa Vi&ccedil osa Minas Gerais Brazil Department of Biochemistry and Molecular Biology Federal University of Vi&ccedil osa Vi&ccedil osa Minas Gerais Brazil Biomolecules Analysis Cente Federal University of Vi&ccedil osa Vi&ccedil osa Minas Gerais Brazil

Proteomics techniques were used to study the molecular mechanisms involved in the defense of tomato against late blight (Phytophthora infestans). Proteins were extracted from resistant access BGH-2127 and susceptible cultivar “Santa Clara”. Leaves of the inoculated and non-inoculated (control) genotypes were collected at 0, 2, and 48 h after inoculation and analyzed by two-dimensional electrophoresis (2-DE), followed by identification with mass spectrometry (MALDI TOF-TOF). A total of 56 differentially abundant proteins were identified, of which 39 were resistant genotypes and 17 were susceptible. These proteins were categorized into functional groups of energy and metabolism, photosynthesis, stress and defense, transcription, other proteins, and as un-characterized ones. For access BGH-2127, oxidative stress proteins (2-cis peroxiedoxin BAS1 and 2-cis peroxiredoxin) and thaumatin-like protein showed increase in the relative abundance at 0 and 48 h of inoculation, respectively, and were therefore considered important for the defense mechanism of this genotype. The expression standards evaluated by real-time PCR differed from the results of the proteomic analysis. The protein-protein interaction networks provided important information on the cellular activities involved in the resistance of BGH-2127 late blight.

关键词： Solanum lycopersicum L. Pathogenesis-Related (PR) Proteins Resistance to Phytophthora infestans

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