Adaptability and stability of commercial yield of arracacha in southern region of Minas Gerais State

Abstract

The arracacha is a great economical alternative for Brazilian farmers. The aim of this research was to determine the stability and adaptability of arracacha clones by the methodology of factors analysis and bissegmented regression. Five clones, three cultivars (Amarela de Senador Amaral, BRS Rubia 41 and BRS Catarina 64), and two advanced clones (EH-48 and EH-56) were evaluated in 10 locations in the southern of the Minas Gerais State, Brazil, in the agricultural years 2012/13, 2013/14 and 2015/16. The experimental plots consisted of three random samples within the arracacha observation units. Each sample consisted of five plants collected in sequence, highlighting and weighing commercial roots and transforming the portion of the production data for t ha-1. Individual and joint variance analyzes were performed and, with the adjusted means the Scott-Knott grouping test was done. The bissegmented regression factors were analysed to obtain the stability and adaptability. The EH-56 clone stood out for its productive potential in almost all environments, superior to the other clones. The EH-56 clone stood out as the most suitable through the analysis of factors methodology, while BRS Rubia 41 and BRS Catarina 64 had specific adaptation to some environments and Amarela de Senador Amaral, variety that has been multiplied locally by farmers for over 15 years is little adapted. By bissegmented regression, no clone had ideal behavior. However, BRS Rubia 41 stands out for good adaptation in favorable environments. The analysis of factors associated to the bissegmented regression allows better accuracy in the response of arracacha clones to stability and adaptability.

Enraizamiento de propágulos de Arracacia xanthorrhiza Bancroft. en el Banco de Germoplasma de Colombia

“…Conocer el potencial de enraizamiento de materiales que presentan propagación vegetativa, permite identificar materiales de siembra homogéneos, con características fenotípicas similares como el tiempo y la capacidad de generación de raíces, sumado a la abundancia de las mismas, lo que permite a futuro obtener cultivos homogéneos y adaptados a condiciones agroclimáticas específicas. En el sur del Estado de Minas de Gerais, Brasil, lograron determinar la estabilidad y adaptabilidad del clon de arracacha EH-56 mediante el uso de metodologías de análisis factorial y regresión bisegmentada, este clon presentó un alto potencial productivo en diferentes ambientes, superior a los demás clones evaluados, quienes presentaron adaptación específica incluso superiores a las de un clon cultivado por años por los agricultores de esta región, el cual resultó poco adaptado (Carvalho et al, 2018).…”

Assessment of somaclonal variation in indirect morphogenesis-derived plants of Arracacia xanthorrhiza

“…Arracacha (Arracacia xanthorrhiza Bancroft) is a perennial root crop from the Apiaceae family, native to the Andean highlands from Venezuela to Bolivia (Orílio et al, 2013). Currently, it is cultivated in Brazil (Carvalho et al, 2018), a few parts of Central America, and in the Caribbean, also showing potential to be distributed as a root crop in the highlands of tropical areas in Asia and Africa (National Research Council, 1989). The edible portion of the plant consists of tuberous roots containing from 10 to 25% (fresh weight; FW) starch, which is easily digestible and, therefore, suitable for infants and patients.…”