Productivity, adaptability and stability of high-oleic peanut lines in the State of São Paulo

ABSTRACT Estimating stability and adaptability parameters of cultivars is a widely used study to access the genotype × environment interaction, in order to identify the best genotypes for each cultivation area. In this study, the adaptability and stability parameters were estimated in eight high-oleic lines and two peanut cultivars in 11 experiments in the State of São Paulo, Brazil, from 2008 to 2013, based on the data of the plots mean productivity (Kg·ha–1), with the objective of recommending the most productive genotypes in peanut producing regions in the State of São Paulo. The design used for these experiments was the randomized complete blocks, with four replications. Lines L. 599 and L. 551 were the best genotypes regarding overall adaptability and stability in yield, considering the methods of Eberhart and Russell and of Lin and Binns modified by Carneiro. Results produced by both methods were convergent as for the classification of the lines, and the use of one of them would not be detrimental to the recommendation of productive lines associated to production adaptability and stability. The overall adaptability in addition to the stability in the productivity of the lines here evaluated showed outstanding performance in relation to the cultivars IAC Caiapó and Runner IAC 886.

摘要 估算品种的稳定性与适应性参数，是解析基因型×环境互作效应的常用研究手段，旨在筛选适配各种植区域的最优基因型。本研究以2008至2013年巴西圣保罗州11个试验的小区平均产量（千克·公顷⁻¹）数据为基础，对8个高油酸花生品系与2个花生栽培品种的适应性及稳定性参数进行估算，目标是为圣保罗州花生主产区筛选高产适配基因型。上述试验均采用完全随机区组设计，设置4次重复。结合Eberhart-Russell法以及经Carneiro修正的Lin-Binns法进行分析，结果显示品系L. 599与L. 551是综合适应性与产量稳定性表现最优的基因型。两种方法对品系的分类结果具有一致性，选用其中任意一种方法，均不会影响对兼具高产性、生产适应性与稳定性的品系的推荐。本研究评估的各品系，其综合适应性与产量稳定性均显著优于对照品种IAC Caiapó与Runner IAC 886。