Relationships among agronomic traits and grain composition in oat genotypes grown in different environments
Relationships among agronomic traits and grain composition in oat genotypes grown in different environments
复制标题
DOI：
10.2135/cropsci2004.0063
复制
发表时间：
2005-07-01
期刊：
影响因子：
2.3
通讯作者：
Erickson, CA
中科院分区：
文献类型：
--
作者：
Peterson, DM;Wesenberg, DM;Erickson, CA
基因型和环境是植物表型的主要决定因素。经济上重要的数量性状包括农艺性状和籽粒组成。研究了基因型和环境对籽粒组成和农艺性状的影响。1999-2001年，在爱达荷州连续3年（Aberdeen灌溉、Tetonia灌溉和Tetonia旱地）进行了33种燕麦（Avena sativa L.）基因型试验。测定了产量、抽穗日期、籽粒物理特性以及籽粒蛋白、β -葡聚糖、油脂、工具和avenanthrides的浓度。综合分析所有环境下的数据显示，除avenanthramide 2f外，所有性状的基因型差异均显著。除产量、α -生育酚和avenanthrides外，其余性状的变异均与基因型相关。基因型X试验互作仅对avenanthrides浓度显著，而基因型X年互作对大多数性状均显著。主成分分析双标图显示，2000年和其他年份的蛋白质和石油价格存在明显差异。一些基因型在不同环境中都是稳定的；其他人在不同的环境中有不同的反应。相关分析表明，各性状间存在密切的相关关系，其中avenanthramide与β -葡聚糖相关，oil与groat physical characteristics及avenanthramide 2f负相关。结果表明，了解性状与环境的关系可以帮助育种者同时优化农艺性状和籽粒组成。
Genotype and environment are major determinants of plant phenotype. Economically important quantitative traits include agronomic characteristics and grain composition. This study examined relationships among agronomic traits and grain composition as influenced by genotype and environment. Thirty-three oat (Avena sativa L.) genotypes were grown in three trials in Idaho (Aberdeen irrigated, Tetonia irrigated, and Tetonia dryland) in three consecutive years (1999-2001). Yield, heading date, kernel physical characteristics, and concentrations of groat protein, beta-glucan, oil, tocols, and avenanthramides were measured. Analysis of the combined data for all environments showed significant genotypic differences for all traits except avenanthramide 2f. Most of the variance was associated with genotype for all traits except yield, alpha-tocopherol, and the avenanthramides. The genotype X trial interaction was significant only for avenanthramides concentration, whereas the genotype X year interaction was significant for most traits. Principal component analysis biplots illustrate that for protein and oil there was a clear difference between 2000 and the other years. Some genotypes were stable across environments; others responded differently in different environments. Correlation analysis showed several close associations among traits: avenanthramides were correlated with beta-glucan, and oil was negatively correlated with groat physical characteristics and with avenanthramide 2f. The results show that knowledge of the relationships among traits and environments can assist breeders in optimizing both agronomic traits and grain composition simultaneously.