Efeitos da interação genótipo x ambiente no ciclo e na coloração do tegumento dos grãos do feijoeiro comum Genotype x environment interaction efects in cycle grain in common tegument colour and cycle in bean cultivars

O objetivo deste trabalho foi estudar os efeitos da interação genótipo x ambiente, visando identificar cultivares de feijão com estabilidade para a coloração do tegumento dos grãos e para o ciclo na região da Depressão Central do Rio Grande do Sul. Seis experimentos foram instalados nos anos agrícolas 2000/01, 2001/02 e 2002/03, nos cultivos de safra (semeadura em setembro-outubro) e de safrinha (semeadura em janeiro-fevereiro), em área do Departamento de Fitotecnia da Universidade Federal de Santa Maria. O delineamento experimental utilizado foi o de blocos ao acaso, com três repetições, e os tratamentos consistiram de 16 cultivares de feijão. Os resultados evidenciaram que a coloração do tegumento dos grãos em cultivares de feijoeiro comum do grupo comercial carioca é influenciada pelo ambiente. As cultivares Carioca, Diamante Negro, TPS Nobre e TPS Bionobre apresentam alta previsibilidade para obter grãos de feijão de cor de tegumento adequados às exigências do mercado consumidor. Nenhuma cultivar de feijão apresentou estabilidade para ciclo.<br>The objective this work was to assess the effects of genotype x environment interaction in order to identify bean cultivars with stability for grain tegument colour and cycle in the central depression region of Rio Grande do Sul in order to guide breeding programs. Six experiments, with 16 common bean cultivars were conducted during the 2000/01, 2001/02 and 2002/03 growing season and sowing was carried out on Set/Out (Crop 1) and on Jan/Fev (Crop 2) in experimental fields of the Plant Science Department of the Santa Maria Federal University. Complete randomized blocks with three replications as used. Results showed that colour of grain tegument in carioca beans was influenciated by the environment. 'Carioca', 'Diamante Negro', 'TPS Nobre' and 'TPS Bionobre' showed high predictability for production of bean grains with tegument colour with acceptable preference by consumers. Nothing bean cultivar showed stability for cicle

Stability and adaptability of runner peanut genotypes based on nonlinear regression and AMMI analysis

The objective of this work was to estimate the stability and adaptability of pod and seed yield in runner peanut genotypes based on the nonlinear regression and AMMI analysis. Yield data from 11 trials, distributed in six environments and three harvests, carried out in the Northeast region of Brazil during the rainy season were used. Significant effects of genotypes (G), environments (E), and GE interactions were detected in the analysis, indicating different behaviors among genotypes in favorable and unfavorable environmental conditions. The genotypes BRS Pérola Branca and LViPE‑06 are more stable and adapted to the semiarid environment, whereas LGoPE‑06 is a promising material for pod production, despite being highly dependent on favorable environments