Yield and quality of seeds of lettuce genotypes produced under organic management

Josiany Thamara Alves Souza,Delacyr Da Silva Brandão Junior,Warley Marcos Nascimento,João Batista De Campos Menezes,Cândido Alves Da Costa,Wesley José Cardoso

doi:10.1590/2317-1545v41n3220435

Josiany Thamara Alves Souza, Delacyr Da Silva Brandão Junior + Show 4 more

Open Access

https://doi.org/10.1590/2317-1545v41n3220435

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Abstract

Abstract: is one of the main vegetable species used in organic production. However, studies and research in the organic area are scarce. This study aimed to evaluate the yield and quality of seeds of lettuce genotypes produced in two consecutive years under an organic management system. Two plantations were installed under open field conditions corresponding to autumn/winter in 2016 and 2017. Ten lettuce genotypes were evaluated in four replications using a biofertilizer made from swine manure in the management and manual harvesting of seeds. Evaluations consisted of seed yield (in kg.ha−1), physical test (1000-seed weight), and germination and vigor test (first germination count, germination rate index, and seedling dry matter). The genotype Cubana and two Grand Rapids had higher yields under the tested conditions. Higher seed weights were recorded in 2017. Both genotypes Grand Rapids reached the minimum germination standard established for commercialization (80%). Vanda and AC 5058 showed a better performance for germination rate index and first germination count, while Cinderela had a better seedling dry matter. These varieties were promising for organic cultivation.

Highlights

IntroductionThe success of vegetable seeds companies is linked to factors such as availability of cultivars that usually come from plant breeding programs, climate conditions according to the specificity of each cultivar, and seed production technology
Leafy vegetables represent 35% of the area of vegetable species produced in Brazil, and lettuce (Lactuca sativa L.) stands out for being the most consumed and produced leafy vegetable, followed by arugula, cabbage, and watercress (ABCSEM, 2018).Lettuce is propagated by seeds, whose physiological and sanitary quality is essential for a fast and uniform establishment in the field, being one of the factors that provide the success of the production of this vegetable (Nascimento et al, 2011).The success of vegetable seeds companies is linked to factors such as availability of cultivars that usually come from plant breeding programs, climate conditions according to the specificity of each cultivar, and seed production technology
Two experiments were conducted during autumn/winter, both planted in June in an area of non-conventional vegetables of the Instituto de Ciências Agrárias of Universidade Federal de Minas Gerais (UFMG), located in Montes Claros, northern

Summary

Introduction

The success of vegetable seeds companies is linked to factors such as availability of cultivars that usually come from plant breeding programs, climate conditions according to the specificity of each cultivar, and seed production technology. All these factors influence in obtaining high-quality seeds, considering genetic, physical, physiological, or sanitary aspects (Nascimento and Melo, 2015). Northern Minas Gerais State presents a semiarid climate, defined dry seasons, and mean annual temperatures relatively high, with periods of mild temperatures These characteristics, combined with the use of an irrigation system, favor seed production of most vegetables

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