Willian Krause

Melhoria na eficiência dos experimentos de indicalção de cultivares de milho

Objetivou-se com este trabalho verificar o comportamento da precisao experimental mediante o uso de metodos de correcao de produtividade das parcelas experimentais e suas influencias sobre a comparacao e indicacao de cultivares de milho pelo metodo de Annicchiarico (1992). Foram analisadas 33 cultivares com tres repeticoes em blocos casualizados em 8 ambientes, submetidos a correcao do rendimento de parcelas pelos metodos da covariância para estande ideal (COVI) e pela correcao estratificada (CE), incluindo a analise sem correcao (SC). Houve reducao no coeficiente de variacao, com o ajuste da produtividade, melhorando a eficiencia dos experimentos. Os metodos COVI e CE foram consistentes na correcao da produtividade para indicacao de cultivares. A correcao dos dados influencia na indicacao de cultivares.

Avaliação da qualidade fisiológica de sementes de feijão-caupi pelo teste de condutividade elétrica

Evaluation of cowpea seed quality by electrical conductivity The electrical conductivity of the seed soaking solution is a procedure recommended for the evaluation of vigor in pea and soybean seeds. However, it was not so well established in other species. The objective of this work was to evaluate their effects on physiological quality of cowpea seeds. Four batches of cowpea seeds were tested for germination, first count of germination, germination percentage, emergence percentage, rate of emergence, radicle and variations in electrical conductivity (temperature 25 °C; volumes of 75 mL and 100 mL of water, 25 and 50 seeds, and 2, 4, 8, 12 and 24 hours periods). The experimental design was a completely randomized with four replicates for each treatment. Based on these results, it was found that the electrical conductivity test was efficient in the separation of seed lots according to their vigor levels.

Predição de ganhos genéticos utilizando o Delineamento I em população de maracujazeiro

This study aimed to evaluate the potential population of passion for agronomic traits and to estimate genetic parameters for prediction of earnings. And still evaluating responses to selection and the earnings from the alternative selection. Were studied in this work, alternative selection of Design I in passion fruit: selection among males, females and males (all males) among females (independent of males), females and males selected, and combined selection. This disclosed the presence of genetic variability in the population, which is quite favorable to the improvement in that the genetic heterogeneity possible to obtain gains through selection. In all production characteristics evaluated, the combined selection (CS) was the one that gave greater selection gains.