Selection of Myrciaria dubia clones under conditions of the savanna/forest transition of Roraima through multivariate analysis

Q4 Agricultural and Biological Sciences

Agronomia Colombiana Pub Date : 2022-04-30 DOI:10.15446/agron.colomb.v40n1.100319

Roberto Tadashi Sakazaki, Edvan Alves Chagas, Carlos Abanto-Rodríguez, Pollyana Cardoso Chagas, Maria da Conceição Rocha de Araujo, João Luiz Lopes Monteiro Neto, M. Grigio, Luiz Guilherme Carvalho Zborowski, Raphael Henrique Da Silva Siqueira, Jorge Zamir Erazo Amaya

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Abstract

Camu-camu (Myrciaria dubia), a fruit from the Amazon region, has received attention due to its high content of antioxidant compounds such as ascorbic acid and polyphenols. This study’s objective was to select camu-camu clones according to their morphological characteristics using multivariate analyses. We evaluated 56 camu-camu clones distributed in three blocks with two plants per experimental plot. The variables measured were plant height (H), number of basal branches (NBB), number of terminal buds (NTB), basal stem diameter (BSD), chlorophylls a (Chl a) and b (Chl b), and total chlorophyll (Chl a + b). Principal component (PCA) and multivariate clustering analyses were performed using the average linkage mean and Mahalanobis distance algorithms. After 24 months, results showed that the characteristic that least contributed to clone selection was NBB. The plant height (H), number of terminal buds (NTB), basal stem diameter (BSD), chlorophylls a (Chl a) and b (Chl b), and total chlorophyll (Chl a + b) had the most positive contribution towards the initial selection of camu-camu clones at two years of age. The 22 camu-camu clones showed the highest rate of vegetative development or vegetative quality index (VQI) in the transitional savanna/forest area of the northern Amazon, Brazil, after two years of transplanting.

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罗赖马稀树草原/森林过渡条件下杜比杨梅无性系的多元分析筛选

Camu Camu（Myrcharia dubia）是一种来自亚马逊地区的水果，因其富含抗坏血酸和多酚等抗氧化化合物而受到关注。本研究的目的是通过多变量分析，根据其形态特征选择camu-camu克隆。我们评估了分布在三个区块的56个camu-camu克隆，每个实验地块有两株植物。测量的变量是株高（H）、基部分枝数（NBB）、顶芽数（NTB）、基茎直径（BSD）、叶绿素a（Chl a）和b（Chl b）以及总叶绿素（Chl a+b）。使用平均连锁均值和马氏距离算法进行主成分分析和多元聚类分析。24个月后，结果表明对克隆选择贡献最小的特征是NBB。株高（H）、顶芽数（NTB）、基茎直径（BSD）、叶绿素a（Chl a）和叶绿素b（Chl b）以及总叶绿素（Chl a+b）对2年龄camu无性系的初选贡献最大。在巴西亚马逊北部的过渡稀树草原/森林地区，22个camu-camu无性系在移植两年后表现出最高的营养发育率或营养质量指数（VQI）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Agronomia Colombiana Agricultural and Biological Sciences-Agronomy and Crop Science

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： Agronomia Colombiana journal it is intended to transfer research results in different areas of tropical agronomy. Original unpublished papers are therefore accepted in the following areas: physiology, crop nutrition and fertilization, genetics and plant breeding, entomology, phytopathology, integrated crop protection, agro ecology, weed science, environmental management, geomatics, biometry, soils, water and irrigation, agroclimatology and climate change, post-harvest and agricultural industrialization, food technology, rural and agricultural entrepreneurial development, agrarian economy, and agricultural marketing (Published: Quarterly).