Phenotypic traits and genetic diversity of elephant grass for bioenergy purposes

IF 1.6 3区 农林科学 Q2 AGRONOMY
Josefa Grasiela Silva Santana, Rogério Figueiredo Daher, Moisés Ambrósio, Cleudiane Lopes Leite, Ana Kesia Faria Vidal, Rafael Souza Freitas, Maxwel Rodrigues Nascimento, José Antonio Lamônica Netto, João Victor Bousquet Duarte, João Esdras Calaça Farias, Alexandre Gomes de Souza
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Abstract

The analysis of phenotypic variation patterns is pivotal in breeding programs when developing new cultivars to fully exploit allelic richness for specific purposes. In this study, we assessed 182 genotypes of elephant grass from partially inbred families, focusing on six phenotypic traits (dry matter yield—DMY, dry matter percentage—DM, number of tillers—NT, plant height—PH, stem diameter—SD, and leaf blade width—LW). Our goal was to quantify the genetic diversity necessary for the management of elephant grass breeding for energy production. Both univariate analysis (descriptive statistics) and multivariate analysis (Principal Component Analysis and Hierarchical Clustering on Principal Components) were employed to investigate the diversity across partially inbred S1 family genotypes of elephant grass. Significant phenotypic variation was observed between the evaluated traits, with DMY, NT, and LW exhibiting the most pronounced differences. DMY, PH, and NT displayed positive correlations and demonstrated a robust ability to distinguish between the genotypes. Cluster analysis revealed four distinct groups of genotypes. The identification of taller plants with a higher number of tillers offers a valuable means of discriminating superior genotypes. This, in turn, enhances the selection of partial lines to develop new hybrid elephant grass cultivars with the aim of increasing energy biomass production.

Abstract Image

生物能源用象草的表型特征和遗传多样性
在育种计划中,表型变异模式分析是开发新栽培品种以充分利用等位基因丰富性达到特定目的的关键。在本研究中,我们评估了来自部分近交系的 182 个象草基因型,重点关注六个表型性状(干物质产量-DMY、干物质百分比-DM、分蘖数-NT、株高-PH、茎直径-SD 和叶片宽度-LW)。我们的目标是量化能源生产用象草育种管理所需的遗传多样性。我们采用了单变量分析(描述性统计)和多变量分析(主成分分析和主成分层次聚类)来研究象草部分近交系 S1 家族基因型的多样性。在所评估的性状之间观察到了显著的表型差异,其中 DMY、NT 和 LW 的差异最为明显。DMY、PH 和 NT 显示出正相关性,并表现出很强的区分基因型的能力。聚类分析显示出四组不同的基因型。识别分蘖数较多的高植株是区分优良基因型的重要手段。这反过来又加强了对部分品系的选择,以开发新的杂交象草栽培品种,从而提高能源生物质的产量。
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来源期刊
Genetic Resources and Crop Evolution
Genetic Resources and Crop Evolution 农林科学-农艺学
CiteScore
4.10
自引率
10.00%
发文量
178
审稿时长
3 months
期刊介绍: Genetic Resources and Crop Evolution is devoted to all aspects of plant genetic resources research. It publishes original articles in the fields of taxonomical, morphological, physiological, biochemical, genetical, cytological or ethnobotanical research of genetic resources and includes contributions to gene-bank management in a broad sense, that means to collecting, maintenance, evaluation, storage and documentation. Areas of particular interest include: -crop evolution -domestication -crop-weed relationships -related wild species -history of cultivated plants including palaeoethnobotany. Genetic Resources and Crop Evolution also publishes short communications, e.g. newly described crop taxa, nomenclatural notes, reports of collecting missions, evaluation results of gene-bank material etc. as well as book reviews of important publications in the field of genetic resources. Every volume will contain some review articles on actual problems. The journal is the internationalized continuation of the German periodical Die Kulturpflanze, published formerly by the Institute of Plant Genetics and Crop Plant Research at Gatersleben, Germany. All contributions are in the English language and are subject to peer reviewing.
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