Biomass association in specimens and interspecific hybrids of tomatoes

Abstract

The objective of this study is to analyze the growth of wild species of tomato, of the cultivar Redenção and of the respective F1 hybrids of interspecific crossings. We evaluated six wild-type accessions (Solanum pimpinellifolium ‘AF 26970’, S. galapagense ‘LA-1401’, S. peruvianum ‘AF 19684’, S. habrochaites var. hirsutum ‘PI-127826’, S. habrochaites var. glabratum ‘PI-134417’, and S. pennellii ‘LA-716’) and the commercial cultivar Redenção (S. lycopersicum) together with their respective interspecific hybrids. In completely randomized blocks and plots subdivided by time (16, 28, 42, 56, 70, and 84 days after transplanting), we evaluated leaf area (LA), total dry matter (TDM), absolute growth rate (AGR), relative growth rate (RGR) and net assimilation rate (NAR). The distribution of assimilates in the different organs followed different patterns according to genotype. There was a greater accumulation of LA and TDM in the accessions ‘PI-127826’ and ‘PI-134417’ and in the hybrids ‘Redenção’ x ‘PI-127826’ and ‘Redenção’ x ‘PI-134417’. Due to a heterotrophic effect provided by the crossings, there were higher LA, TDM, AGR, RGR and NAR in hybrids than in parent plants. The accessions ‘PI-127826’ and ‘PI-134417’ presented a potential to be donor parents for obtaining tomatoes with a greater capacity of net assimilation and biomass accumulation.

Effect of ozone sterilization on controlling leaf mildew and gray mold tomato disease in a glasshouse and its influence on other growth parameters

“…Artificial pollination is carried out at noon on sunny days as far as possible. At this time the effect is relatively good 19 …”

Associational Resistance Using Wild and Commercial Tomato Genotypes Employed in the Management of Tomato Virus Vectors

“…The wild PI 134417 was not bred for possessing commercial attributes. Because of that, it kept growing in height and diameter, presenting a significant vegetative growth, confirmed by a greater leaf area and the accumulation of dry matter compared to other commercial and wild genotypes [38]. Therefore, the commercial plants associated with PI 134417 probably suffered more with the established competition, which was reflected in a reduced yield.…”

Selection for drought tolerance in backcross populations derived from interspecific crosses of Solanum lycopersicum × Solanum pennellii

“…S. pennellii is a species originated from South America that is able to grow and reproduce in dry and saline soils, being a valuable source for breeding programmes focused on drought tolerance (Iba, 2002; Ramírez‐Ojeda et al, 2021; Solankey et al, 2015). This wild tomato has several adaptive mechanisms, such as small leaf surface, thick leaves, conservative stomatal behaviour and cuticular composition, that confers increased tolerance to drought (Bolger et al, 2014; Dariva et al, 2020; Kebede et al, 1994; Zeist et al, 2019).…”