Abstract
Abstract Adaptability is the yield response of cassava genotypes to environmental improvement, and stability is the predictability of this response to variations. The objective of this study was to evaluate the yield stability and adaptability of cassava varieties and clones using the AMMI (Additive Main Effects and Multiplicative Interaction) methodology and auxiliary tools as supplementary genotype and environment. The responses of 24 cassava genotypes were evaluated in three environments located in the state of Alagoas, Brazil, in randomized blocks design, with 24 treatments and three replications. The effects of genotype and genotype x environment interactions significantly influenced yield. Genotypes differed regarding the adaptability and stability of yield response, and the varieties Cria Menino and Preta do Araripe were considered ideal genotypes due to high adaptability and yield stability. Among the three tested environments, Limoeiro de Anadia was the best since it presented high yield, phenotypically stable genotypes for cassava breeding programs.
Highlights
Cassava is an economically and socially important root vegetable since it generates labor and income for small farmers in large areas of the developing world
Cassava yield accounted for 22.53 million tons in the year of 2016, most of which (61%) was produced in the North, Northeast and South-Central regions (IBGE 2016)
In the Northeast, in the 2015/2016 harvest, the largest planted areas occurred in the states of Bahia (290 million ha) and Maranhão (158 million ha), and the most productive states were Alagoas (14.17 ton ha-1) and Sergipe (15.39 ton ha-1) (IBGE 2016)
Summary
Cassava is an economically and socially important root vegetable since it generates labor and income for small farmers in large areas of the developing world. The use of Cassava co-products, such as the aerial parts and roots, has grown in recent years, being used to produce tapiocas, special flours, appetizers, and animal feeding. Brazil is currently the world’s second largest cassava producer, the mean yield (14.82 ton ha-1) is 59% lower than that of India (35.65 ton ha-1) (FAO 2016). Cassava is the sixth most widely planted crop in Brazil. Cassava yield accounted for 22.53 million tons in the year of 2016, most of which (61%) was produced in the North, Northeast and South-Central regions (IBGE 2016). In the Northeast, in the 2015/2016 harvest, the largest planted areas occurred in the states of Bahia (290 million ha) and Maranhão (158 million ha), and the most productive states were Alagoas (14.17 ton ha-1) and Sergipe (15.39 ton ha-1) (IBGE 2016)
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