Métodos quantitativos para composição de lotes de sementes de Bowdichia virgilioides Kunth

Abstract

In the current scenario, there are few studies on native forest species, especially when referring to the composition of high-quality seed lots, since this is a crucial factor for the propagation and commercialization of these species. In this context, the objective of this work was to evaluate the grouping and ranking analysis as a technique for the formation of homogeneous seed lots when it comes to aspects related to the germination of the species Bowdichia virgilioides Kunth. The seeds came from the localities of the Environmental Protection Area (APA) Joanes Ipitanga, in the municipality of Simões Filho, BA and the Federal University of the Recôncavo of Bahia, municipality of Cruz das Almas. After the gathering of seeds, the processing was performed, through which 100 seeds were separated from the 24 matrices and a similar quantity of seeds from each matrix was selected for the matrix of the mixture lot. The seed dormancy was overcome using the method of immersion in sulfuric acid and washing with soap and water. The experimental design was of 4 replicates and 25 treatments. The seeds were placed on the Germitest paper, moistened with distilled water, and then wrapped and packed in Biochemical Oxigen Demand (B.O.D.) at an alternating temperature of 25°C - 30°C and 12 hours photoperiod. The evaluation period occurred daily until the stabilization of germination and development of normal seedlings. It was verified that, based on the analysis of multivariate variance, the seed quality differed between the matrices. For the establishment of the ranking and the grouping of matrices, the one that presented the best performance in relation to all the variables evaluated was the matrix 11.