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Influence of agronomic and kernel-related properties on popping expansion in popcorn
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-03-07 , DOI: 10.1002/agj2.20645
Marcelo Akira Saito 1 , Alex Viana Alves 1 , Danilo de Paula Kuritza 2 , Yure Pequeno Souza 3 , Maria Fernanda de Souza Dias Maioli 1 , Antônio Teixeira do Amaral Júnior 3 , Antônio Carlos Bento 2 , Carlos Alberto Scapim 1 , Ronald José Barth Pinto 1
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Knowledge about relationships between traits can contribute to raising the efficiency of selection of superior genotypes. The objective of this study was to estimate the correlations, direct and indirect effects of agronomic, chemical and physical traits of kernels on popping expansion (PE) in popcorn (Zea mays L.). The trial was carried out in the 2017/2018 growing season, in Maringá - PR, with 49 treatments, which consisted of 43 popcorn, four flint, and two sweet corn. The trial was arranged in a randomized complete block design with three replications. Multiple agronomic, chemical, physical, and popcorn quality traits were evaluated. Analysis of variance was performed to estimate the coefficients of phenotypic and genotypic correlations and the direct and indirect effects of path analysis. The genotypes were partitioned into genotype within each kernel type (popcorn, flint, and sweet corn) and two more contrasts (popcorn vs. [flint + sweet corn]) and flint vs. sweet corn. Positive phenotypic (.76) and genotypic correlations (.81) between popping expansion and pericarp thickness were detected. Kernel length had negative phenotypic (−.75) and genotypic correlations (−.78) with PE. Path analysis indicated that pericarp thickness has a direct and positive effect on PE and that the observed positive correlation with thermal diffusivity of the kernel pericarp and kernel length can be explained by indirect effects of the pericarp thickness. Evaluating kernel length may be most prudent considering economical and practical constraints to popcorn breeding programs.

中文翻译:

农艺和籽粒相关特性对爆米花爆裂膨胀的影响

了解性状之间的关系有助于提高选择优良基因型的效率。本研究的目的是估计玉米粒的农艺、化学和物理特性对爆米花(Zea mays)爆裂膨胀(PE)的相关性、直接和间接影响L.)。该试验是在 2017/2018 生长季节在马林加进行的,共有 49 个处理,包括 43 个爆米花、4 个燧石和两个甜玉米。该试验采用随机完整区组设计,重复三次。评估了多种农艺、化学、物理和爆米花品质特性。进行方差分析以估计表型和基因型相关性的系数以及路径分析的直接和间接影响。基因型被划分为每个谷粒类型(爆米花、燧石和甜玉米)和另外两个对比(爆米花与 [燧石 + 甜玉米])和燧石与甜玉米的基因型。检测到爆裂扩张和果皮厚度之间的正表型 (.76) 和基因型相关性 (.81)。核长度具有负表型 (-. 75) 和与 PE 的基因型相关性 (-.78)。通径分析表明,果皮厚度对 PE 有直接和积极的影响,观察到的果仁热扩散率和果仁长度的正相关可以用果皮厚度的间接影响来解释。考虑到爆米花育种计划的经济和实际限制,评估籽粒长度可能是最谨慎的。
更新日期:2021-03-07
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