Data/hora: 09/06/2024 09:34:25

Provedor de dados: | Horticultura Brasileira
País: | Brazil
Título: | Photosynthetic characteristics in species and interspecific hybrids of tomato
Autores: | Zeist,André R; Resende,Juliano TV; Faria,Marcos V; Gabriel,André; Adriano,Elisa; Lima Filho,Renato B.
Data: | 2018-09-01
Ano: | 2018
Palavras-chave: | Solanum lycopersicum; Wild accessions; Pre-breeding; Gas exchange.
Resumo: | ABSTRACT Gas exchanges in species and interspecific hybrids of tomato in different environments may contribute to the development and selection of genotypes with a higher tolerance to adverse cultivation conditions. This study aimed to assess the photosynthetic characteristics of wild tomato species and the cultivar Redenção, as well as the respective F1 hybrids of interspecific crosses cultivated under two environments. The experimental design was a randomized block design with three replications and the assessment of six wild accessions, one cultivar, and the respective interspecific hybrids under two environments. At 14, 28, 42, 56, and 70 days after transplanting (DAT), gas exchange characteristics were assessed by means of a portable photosynthesis measurement system. The stomatal density of abaxial and adaxial surfaces of first-order leaflets was estimated under a protected cultivation at 56 DAT. We observed a higher influence of wild tomato species and interspecific hybrids on the assessed characteristics when compared to the cultivation environments. The accession ‘LA-716’ and the hybrid ‘Redenção’ × ‘LA-716’ presented the highest water use efficiency and the accessions ‘PI-127826’ and ‘PI-134417’ and the interspecific hybrids ‘Redenção’ × ‘PI-127826’ and ‘Redenção’ × ‘PI-134417’ presented the highest values of CO2 assimilation, transpiration, instantaneous in vivo carboxylation efficiency of Rubisco, and number of stomata on the abaxial leaflet surface. Thus, the descendants of Solanum habrochaites are an interesting alternative to breeding programs that aim to make advances in obtaining strains that exhibit improvement in their photosynthetic characteristics.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362018000300362
Editor: | Associação Brasileira de Horticultura
Relação: | 10.1590/s0102-053620180313
Formato: | text/html
Fonte: | Horticultura Brasileira  v.36 n.3 2018
Fonte: | info:eu-repo/semantics/openAccess