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首页> 美国卫生研究院文献>The Scientific World Journal >Revealing the Diversity of Introduced Coffea canephora Germplasm in Ecuador: Towards a National Strategy to Improve Robusta
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Revealing the Diversity of Introduced Coffea canephora Germplasm in Ecuador: Towards a National Strategy to Improve Robusta

机译：揭示厄瓜多尔引进的加拿大咖啡种质的多样性：制定改善罗布斯塔的国家战略

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摘要

Genetic resources of Coffea canephora have been introduced in several tropical countries with potential for crop development. In Ecuador, the species has been cultivated since the mid-20th century. However, little is known about the diversity and genetic structure of introduced germplasm. This paper provides an overview of the genetic and phenotypic diversity of C. canephora in Ecuador and some proposals for implementing a breeding program. Twelve SSR markers were used to analyze 1491 plants of C. canephora grown in different living collections in Ecuador, compared to 29 genotypes representing the main genetic and geographic diversity groups identified within the species. Results indicated that most of the genotypes introduced are of Congolese origin, with accessions from both main subgroups, SG1 and SG2. Some genotypes were classed as hybrids between both subgroups. Substantial phenotypic diversity was also found, and correlations were observed with genetic diversity. Ecuadorian Robusta coffee displays wide genetic diversity and we propose some ways of improving Robusta in Ecuador. A breeding program could be based on three operations: the choice of elite clones, the introduction of new material from other countries (Ivory Coast, Uganda), and the creation of new hybrid material using genotypes from the different diversity groups.
机译：几个热带国家已经引进了小花咖啡的遗传资源，具有发展作物的潜力。在厄瓜多尔，该物种自20世纪中叶开始种植。但是，对引进种质的多样性和遗传结构知之甚少。本文概述了厄瓜多尔C. canephora的遗传和表型多样性，并提出了实施育种计划的一些建议。十二种SSR标记用于分析厄瓜多尔不同生活馆藏中生长的1491种毛叶念珠菌植物，而代表该物种内主要遗传和地理多样性组的29种基因型则进行了比较。结果表明，引入的大多数基因型都是刚果人起源的，来自两个主要亚组SG1和SG2的登录。一些基因型被分类为两个亚组之间的杂种。还发现了大量的表型多样性，并观察到与遗传多样性的相关性。厄瓜多尔罗布斯塔咖啡具有广泛的遗传多样性，我们提出了一些改善厄瓜多尔罗布斯塔咖啡的方法。育种计划可以基于三个操作：精英克隆的选择，来自其他国家（象牙海岸，乌干达）的新材料的引进以及使用来自不同多样性群体的基因型创建新的杂交材料。

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