Generation and characterization of a population of Tagetes minuta of broad genetic base - Obtaining selected individuals

IF 1.3 4区生物学 Q3 PLANT SCIENCES

Phyton-international Journal of Experimental Botany Pub Date : 2017-12-21 DOI:10.32604/PHYTON.2017.86.214

Y. Massuh, L. Torres, Sf Ocaño, P. Bruentti, A. Chaves, J. Zygadlo, Ojeda

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引用次数: 1

Abstract

Tagetes minuta L. (Asteraceae) is an annual herb that isof great interest due to the bioactive properties of its essential oil (EO)and its industrial use. In Argentina, 0.5 tons/year of EO are obtainedfrom wild populations and commercialized with a value of 80-120US$/kg. The introduction of the species in culture, and the initiationof a process of domestication, selection and breeding material aimedat generating higher yields and quality of EO as an alternative to wildcollection. The goal of this work was to generate a population with abroad genetic base to obtain high phenotypic variability, and characterizethe individuals morphologically and chemically, thus identifyingand selecting those with outstanding characteristics. From seedsobtained by free crossing of plants of different provenances grown ina preliminary test, a population of broad genetic base was generatedin an experimental plot. Quantitative and qualitative morphologicaltraits were measured in all plants and the selection criteria were definedto form a selected population. The morphological selection criteria(height, plant structure and No of branches) were met by 26% ofthe evaluated plants, of which 2.7% presented interesting EO compositions(selected individuals). Descriptive, principal components andcorrespondence analysis were made. Great variability in the populationof broad genetic base was found regarding the analyzed characters.Since our character definitions allowed to compare and differentiatethe evaluated plants, they were considered as good descriptors of thespecies. The selected individuals were differentiated morphologicallyinto two groups and chemically into three groups, which differed intheir EO main compounds. The selection of these individuals constitutesthe initial stage of this ongoing work that will enable us to continuethe process of domestication and breeding of the species orientedto obtain selected chemotypes.

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具有广泛遗传基础的万寿菊(Tagetes minuta)群体的产生和特征——获得精选个体

万寿菊(Tagetes minuta L.)是一种一年生草本植物，由于其精油(EO)的生物活性特性和工业用途而引起了人们的极大兴趣。在阿根廷，每年从野生种群中获得0.5吨EO，并以每公斤80-120美元的价格进行商业化。将该物种引入栽培，并开始驯化、选择和育种材料的过程，旨在提高EO的产量和质量，作为野生采收的替代方案。本工作的目标是产生具有良好遗传基础的种群，以获得高表型变异性，并对个体进行形态和化学表征，从而识别和选择具有突出特征的个体。在初步试验中，利用不同种源植物自由杂交获得的种子，在试验田中形成了一个遗传基础广泛的群体。测定了所有植株的数量和质量形态性状，确定了选择标准，形成了一个选择群体。26%的被评估植物满足形态选择标准(株高、株结构和枝数)，其中2.7%的被评估植物具有有趣的EO组成(被评估个体)。进行了描述性分析、主成分分析和对应分析。在广泛遗传基础的群体中，所分析的性状有很大的变异性。由于我们的特征定义允许比较和区分被评估的植物，它们被认为是物种的良好描述符。所选个体在形态上分为两组，在化学上分为三组，它们的EO主要成分不同。这些个体的选择构成了这项正在进行的工作的初始阶段，这将使我们能够继续驯化和繁殖物种的过程，以获得选定的化学型。

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来源期刊

Phyton-international Journal of Experimental Botany 生物-植物科学

CiteScore

1.90

自引率

11.80%

发文量

审稿时长

12 months

期刊介绍： Phyton-International Journal of Experimental Botany is an international journal that publishes on the broadest aspects of plant biology and ecology. The journal welcomes the original and exciting submissions that provide new and fundamental insights into the origins, development, and function of plants from the molecular to the whole organism and its interactions within the biotic and abiotic environment. Phyton-International Journal of Experimental Botany publishes outstanding research in the plant and ecology sciences, especially in the areas of plant physiology and biochemistry, plant metabolism, plant ecology and evolution, as well as those making use of synthetic, modeling, bioinformatics, and -omics tools. Manuscripts submitted to this journal must not be under simultaneous consideration or have been published elsewhere, either in part or in whole.