Adaptability of soybean cultivars in different crop years

Abstract

ABSTRACT. Soybean is one of the main sources of foreign exchange credits for Brazil in the agricultural sector. There is increasing interest in growing this leguminous crop, especially in the southern region of Minas Gerais, due to its importance as an alternative for crop rotation with maize. In this respect, the study of the adaptability of new cultivars to the region is indispensable so as to obtain high yields. Thus, the aim of this study was to evaluate the performance of 38 soybean cultivars for growing in the summer season in the municipality of Lavras, MG, Brazil, in the 2010/2011 and 2011/2012 crop years. The experiments were conducted in a randomized block design with 3 replications and the treatments consisted of 38 cultivars. At the time of harvest, the following assessments were made: grain yield (kg/ha), height of the lowest pod (cm), plant height (cm), and lodging. The data were subjected to individual and combined analysis of variance. The phenotypic mean values were clustered, adopting the Scott and Knott test. For simultaneous selection of multiple traits, the sum of rank index of Mulamba and Mock was adopted. The cultivar TMG 801 RR had the best yield performance; the cultivars Monsoy 8001, MGBR-46 8996 I.O. Soares et al. ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 14 (3): 8995-9003 (2015) (Conquista), and BRSMG 68 (Vencedora) also stood out. Considering simultaneous selection for grain yield, plant height, height of the lowest pod, and lodging, the cultivar TMG 801 RR is recommended for growing in the summer season in the southern region of Minas Gerais.

Adaptability and stability of soybean cultivars for grain yield and seed quality

“…The same was observed for the height of the lowest pod, with variation from 19.5 to 10.3 cm. Researches have been conducted in the region with the objective of selecting cultivars with good adaptability and stability, allied to good productive performance and agronomic characteristics (Rezende and Carvalho, 2007;Carvalho et al, 2010;Soares et al, 2015;Silva et al, 2015). The present study is in accordance with the literature.…”

“…In Table 5, a significant difference was detected for the sources of variation (SV), treatments (T), location (L) and year (Y) for all tests (P ≤ 0.01). For treatments, this difference was expected, given that, as mentioned, the cultivars are from different origins, thus the variation for agronomic traits (Soares et al, 2015) and soybean seed quality. (Table 5), it can be verified that, for sieve yield (6.5 mm), all interactions presented significance lower than 1%.…”

Morphoagronomic and productive traits of RR soybean due to inoculation via Azospirillum brasilense groove

“…The interaction between cultivar × growing season was also verified by Soares et al (2015b), indicating that the responses, considering the environmental variations, were not the same for the evaluated cultivars. Since the growing seasons presented differences for rainfall occurrence and temperatures, variations that are unpredictable were expected and the researcher do not have control.…”

Research Article Genetic parameters and selection of soybean lines based on selection indexes.

“…Due to the economic importance of the crop, soybean has been the focus of research, especially in the area of genetic improvement, to obtain improved cultivars, carrying genes capable of expressing broad adaptation and tolerance to biotic and abiotic factors, representing significant contributions to the Productive Sector (Soares et al, 2015).…”