意大利黑麦草居群的形态与分子特征

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2003-12-31 DOI:10.12702/1984-7033.V03N04A01

C. Castro, A. Oliveira, Fernando Irajá Félix Carvalho, M. Maia, L. Mattos, F. A. D. Freitas

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引用次数: 13

摘要

意大利黑麦草是巴西南里奥格兰德州最重要的温带草。尽管它整体上很重要，但在这个州没有这个物种的繁殖计划。本研究的目的是评估四个意大利黑麦草种群内部和之间的现有变异性，其中三个来自巴西南里奥格兰德州，一个来自乌拉圭。利用分蘖数、冠层直径、抽穗期、总叶面积、叶数、面积/叶、叶干物质、茎干物质、叶/茎比和干物质产量等形态性状对种群进行了表征。利用RAPD标记对分子变异进行了表征。种群内变异较大(98.41%)，限制了种群的完全分离。然而，群体间的分蘖数、冠层数和抽穗日期等重要饲草性状存在显著差异，表明目前的变异适合育种计划的启动。

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Morphological and molecular characterization of italian ryegrass populations

Italian ryegrass is the most important temperate grass in Rio Grande do Sul, Brazil. Despite its overall importance, there are no breeding programs for this species in this State. The purpose of this study was to evaluate the existing variability within and between four Italian ryegrass populations, three from Rio Grande do Sul, Brazil, and one from Uruguay. The populations were characterized based on morphological traits such as: number of tillers, canopy diameter, heading date, total leaf area, number of leaves, area/leaf, leaf dry matter, stem dry matter, leaf/stem ratio and dry matter yield. Molecular variation was also characterized using RAPD markers. A large variability was found within the populations (98.41%), which limited the complete separation of populations. However, significant differences were found among populations for traits of great forage interest, such as the number of tillers, canopy and heading date, indicating that the present variability is suitable for the initiation of a breeding program.

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来源期刊

Crop Breeding and Applied Biotechnology AGRONOMY-BIOTECHNOLOGY & APPLIED MICROBIOLOGY

CiteScore

2.70

自引率

13.30%

发文量

审稿时长

6-12 weeks

期刊介绍： The CBAB – CROP BREEDING AND APPLIED BIOTECHNOLOGY (ISSN 1984-7033) – is the official quarterly journal of the Brazilian Society of Plant Breeding, abbreviated CROP BREED APPL BIOTECHNOL. It publishes original scientific articles, which contribute to the scientific and technological development of plant breeding and agriculture. Articles should be to do with basic and applied research on improvement of perennial and annual plants, within the fields of genetics, conservation of germplasm, biotechnology, genomics, cytogenetics, experimental statistics, seeds, food quality, biotic and abiotic stress, and correlated areas. The article must be unpublished. Simultaneous submitting to another periodical is ruled out. Authors are held solely responsible for the opinions and ideas expressed, which do not necessarily reflect the view of the Editorial board. However, the Editorial board reserves the right to suggest or ask for any modifications required. The journal adopts the Ithenticate software for identification of plagiarism. Complete or partial reproduction of articles is permitted, provided the source is cited. All content of the journal, except where identified, is licensed under a Creative Commons attribution-type BY. All articles are published free of charge. This is an open access journal.