Carvalho Márcia, Bebeli Penelope J, Pereira Graça, Castro Isaura, Egea-Gilabert Catalina, Matos Manuela, Lazaridi Efstathia, Duarte Isabel, Lino-Neto Teresa, Ntatsi Georgia, Rodrigues Miguel, Savvas Dimitrios, Rosa Eduardo, Carnide Valdemar
Centre for the Research and Technology of Agro-Environment and Biological Sciences (CITAB), University of Trás-os-Montes and Alto Douro (UTAD), Vila Real, Portugal.
Department of Crop Science, Agricultural University of Athens, Athens, Greece.
J Sci Food Agric. 2017 Oct;97(13):4399-4407. doi: 10.1002/jsfa.8378. Epub 2017 May 29.
Genetic diversity is fundamental to breeding programs and consequently has an important role in obtaining new varieties. To properly use the genetic diversity present in germplasm collections, a good knowledge of the agro-morphological traits of each accession is needed. The aim of this study was to explore the production capacity of 24 cowpea landraces from southern Europe, through phenotypic characterization and evaluation in three different locations in Greece and Portugal.
Most qualitative parameters tested showed a high stability among the three locations. A wide difference was observed among the three locations with respect to number of days to flowering, ranging from 55 to 99 days. Quantitative traits showed a higher genotype × environment than genetic variance component. In general, an inverse relationship between σ /σ ratio (where σ is genotype × genotype interaction and σ is genotype impact) and heritability value was observed. Principal component analysis was able to group accessions based on their origin. The first two principal components explained 97.52% of variation, being the number of seeds per plant, plant height and seed protein content, the traits which contributed most to variability.
The results show that sufficient variation exists in different traits within landraces in the studied cowpea germplasm to pursue a breeding program. However, the quantitative traits showed a higher genotype × environment component. © 2017 Society of Chemical Industry.
遗传多样性是育种计划的基础，因此在培育新品种方面具有重要作用。为了正确利用种质资源库中存在的遗传多样性，需要充分了解每个种质的农艺形态特征。本研究的目的是通过在希腊和葡萄牙的三个不同地点进行表型特征分析和评估，探索来自南欧的24个豇豆地方品种的生产能力。
大多数测试的定性参数在三个地点之间表现出高度稳定性。在三个地点之间观察到开花天数存在很大差异，范围从55天到99天。数量性状表现出较高的基因型×环境方差分量而非遗传方差分量。一般来说，观察到σ /σ比率（其中σ是基因型×基因型相互作用，σ是基因型影响）与遗传力值之间呈反比关系。主成分分析能够根据种质的来源对其进行分组。前两个主成分解释了97.52%的变异，单株种子数、株高和种子蛋白质含量是对变异性贡献最大的性状。
结果表明，在所研究的豇豆种质的地方品种中，不同性状存在足够的变异以开展育种计划。然而，数量性状表现出较高的基因型×环境分量。© 2017化学工业协会。
