Base temperature for node emission and plastochron determination in tomato species and their hybrids

Abstract

-The objective of this work was to estimate the base temperature for node emission and plastochron determination in wild species of tomato, in the Redenção cultivar, and in their respective interspecific F 1 hybrids. The wild accessions Solanum pimpinellifolium AF 26970, Solanum galapagense LA-1401, Solanum peruvianum AF 19684, Solanum habrochaites var. hirsutum PI-127826, Solanum habrochaites var. glabratum PI-134417, and Solanum pennellii LA-716; the cultivar Redenção (Solanum lycopersicum); and their respective interspecific hybrids were evaluated, on the transplanting dates 12/22/2015, 2/12/2016, and 4/6/2016. The base temperature was estimated using the least mean squared error of the linear regression between the number of nodes and the accumulated thermal sum. The plastochron for the main stem and the first three lateral stems was estimated using the base temperature. The base temperature for node emission and plastochron determination varied from 4.5 to 14.8°C. The species S. habrochaites var. hirsutum accession PI-127826, S. habrochaites var. glabratum accession PI-134417, and their hybrids with the Redenção cultivar showed the lowest base temperatures and plastochron for the main stem, whereas the remaining wild species and interspecific hybrids had a base temperature near that of cultivated tomato. Wild species and interspecific hybrids of tomato show a great variation in base temperature for node emission and plastochron determination.Index terms: Solanum lycopersicum, pre-breeding, thermal time, wild accessions. Temperatura-base para emissão de nós e determinação de plastocrono em espécies de tomateiro e seus híbridosResumo -O objetivo deste trabalho foi estimar a temperatura-base para emissão de nós e determinação de plastocrono em espécies silvestres de tomateiro, na cultivar Redenção e em seus respectivos híbridos interespecíficos F 1 . Avaliaram-se os acessos silvestres Solanum pimpinellifolium AF 26970, Solanum galapagense LA-1401, Solanum peruvianum AF 19684, Solanum habrochaites var. hirsutum PI-127826, Solanum habrochaites var. glabratum PI-134417 e Solanum pennellii LA-716; a cultivar Redenção (Solanum lycopersicum); e os seus respectivos híbridos interespecíficos, nas datas de transplantio 22/12/2015, 12/2/2016 e 6/4/2016. A temperatura-base foi estimada com o método do menor quadrado médio do erro da regressão linear entre o número de nós e a soma térmica acumulada. O plastocrono para a haste principal e as três primeiras hastes laterais foi estimado com uso da temperatura-base. A temperatura base para emissão de nós e determinação do plastocrono variou entre 4,5 e 14,8°C. As espécies S. habrochaites var. hirsutum acesso PI-127826, S. habrochaites var. glabratum acesso PI-134417 e os respectivos híbridos com a cultivar Redenção apresentaram os menores valores de temperatura-base e plastocrono da haste principal, enquanto as demais espécies silvestres e os híbridos interespecíficos tiveram temperatura-base próxima à do tomateiro cultivado. As espécies silvestres e os híbridos inte...

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

“…At the same time, the next step involves transferring these characteristics using appropriate approaches and breeding methods [29]. Despite the great accumulated knowledge on the sources and mechanisms of the resistance of tomato wild species to B. tabaci biotype B, M. persicae, and T. tabaci, resistant cultivars still need to be made available [30]. Most of this is caused by the incompatibility between resistant traits and agronomical characteristics.…”

“…The advantages of using PI 134417 as a companion plant to manage tomato virus vectors are not only justified by the presence of resistant traits; instead, this genotype is also a perennial species possessing an indeterminate growth habit and wide adaptability, growing fast even under low temperatures [30]. Like the Desmodium plant used in Africa's push-and-pull strategy, the S. habrochaites accession PI 134417 covers the soil and allows better moisture retention [47].…”

Phenology growth and yield of grafted tomato plants in the high Andean region of Colombia

“…The base temperature was 10°C (Moreno et al, 2016), and the high threshold temperature was 35°C (Nicola et al, 2009). The accumulated growing degree days was calculated by taking the sum of growing degree days as in equation (3) proposed by Cuong and Tanaka (2019) and Zeist et al (2018):…”

“…Nicola et al (2009) reported that temperatures above 35°C cause abortion of tomato flowers, and Moreno et al (2016) indicated a high threshold temperature of 30°C for tomato growth, and a base temperature of 10°C is considered. However, Heuvelink et al (2018) observed that tomato plants and fruits suffer physiological injury under low non-freezing temperatures, below 12°C, and that the base temperature for node emission and plastochron determination in some tomato species varied from 4.5 to 14.8°C (Zeist et al, 2018). The aim of this study was to determine the different phenological phases and yield of tomato plants grafted on different rootstock×scion combinations according to the BBCH scale in the high-Andean region in Colombia.…”