Genetic diversity in creole genotypes of Amazon chicory

IF 0.7 4区环境科学与生态学 Q4 ECOLOGY

Acta Amazonica Pub Date : 2022-04-01 DOI:10.1590/1809-4392202102852

Viviane Pereira Gonçalves, Francisco Laurimar do Nascimento Andrade, R. Gomes, L. D. S. Santos

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Abstract

ABSTRACT Amazon chicory is still a little-known vegetable despite its great agronomic potential. The characterization of chicory genotypes concerning genetic divergence is a key step for breeding programs, as it allows the selection of superior individuals and to explore the variability and complementarity of characteristics via interbreeding between newly generated genotypes. In this context, this study aimed to evaluate the genetic divergence among Amazon chicory creole genotypes from the northern Brazilian states of Pará and Rondônia based on morpho-agronomic traits. We conducted an experiment in a randomized block design with eight chicory genotypes (treatments) and four replications. Both quantitative and qualitative characteristics were evaluated. Genetic divergence was estimated via squared generalized Mahalanobis distance (D2), considering only quantitative characters, and the genotypes were subsequently clustered via the UPGMA method. Analysis of variance showed significant differences among genotypes for all studied characteristics, except shoot fresh weight. The UPGMA grouped the genotypes into three clusters, which demonstrated that the genotypes from Colares and Santarém Novo (Pará) (Chic-02 and Chic-04) were the most divergent as compared to the genotypes from Castanhal and Santa Isabel do Pará (Pará). Qualitative characteristics showed a monomorphic behavior and, therefore, were not used to assess genetic divergences. To obtain segregating populations with complementary characteristics, crossbreeding between the two most divergent clusters is recommended.

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亚马逊菊苣克里奥尔基因型的遗传多样性

尽管菊苣具有巨大的农艺潜力，但它仍然是一种鲜为人知的蔬菜。菊苣基因型的遗传分化是菊苣育种计划的关键一步，因为它允许选择优良个体，并通过新产生的基因型之间的杂交探索特征的可变性和互补性。在此背景下，本研究旨在基于形态农艺性状评估来自巴西北部par州和Rondônia州的亚马逊菊苣克里奥尔基因型之间的遗传差异。采用随机区组设计，采用8个菊苣基因型(处理)和4个重复进行试验。定量和定性评价。在只考虑数量性状的情况下，通过广义马氏距离的平方(D2)估计遗传差异，然后通过UPGMA方法聚类基因型。方差分析表明，除茎鲜重外，各基因型间各性状差异均显著。UPGMA将基因型分为3个聚类，结果表明，与Castanhal和Santa Isabel do par (par)的基因型相比，Colares和santar Novo (par)的基因型差异最大。定性特征表现为单态行为，因此，不用于评估遗传分歧。为了获得具有互补特征的分离群体，建议在两个最分散的群体之间进行杂交。

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

Acta Amazonica PLANT SCIENCESECOLOGYZOO-ECOLOGY

CiteScore

1.70

自引率

0.00%

发文量

审稿时长

22 weeks

期刊介绍： Acta Amzonica is a multidisciplinary, peer-reviewed, open access, free-of-charge scientific journal for research in and about the Amazon region, published since 1971 by the Instituto Nacional de Pesquisas da Amazônia - INPA, in Brazil. The journal publishes quarterly issues containing articles and short communications in English across a broad range of disciplines, including Agronomy and Forestry, Animal Sciences and Fisheries, Biodiversity and Conservation, Biotechnology, Chemistry and Pharmacology, Environmental Sciences, Food Sciences, Geosciences, Health Sciences, Human and Social Sciences, and Materials Technology.