Repeatability and number of harvests required for selection in robusta coffee

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2004-09-30 DOI:10.12702/1984-7033.V04N03A10

A. Fonseca, T. Sediyama, C. Cruz, S. Sakiyama, R. G. Ferrão, M. A. Ferrão, S. M. Bragança

引用次数: 10

Abstract

This study aimed to estimate the repeatability coefficient of the grain yield in Coffea canephora by three methods: to quantify the precision of the measurements; to predict the real value of an individual based on n evaluations; and to determine the number of phenotypic measures required in each plant to obtain an adequate precision level for an efficient discrimination of the genotypes. The coefficients of repeatability and determination were estimated based on four harvests of 80 genotypes. Highest estimates of the repeatability coefficient were obtained by the method of the principal components derived from the matrix of covariances, which expresses the correlation between each measurement pair. The prediction precision of the real individual value ranged from 65.32 to 81.59%, and remained practically unchanged from the sixth harvest on.

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罗布斯塔咖啡选择所需的重复性和收成数量

本研究旨在通过三种方法估计咖啡咖啡籽粒产量的重复性系数:量化测量的精度;通过n次评估来预测个体的真实价值;并确定每株植物所需的表型测量的数量，以获得足够的精度水平，以便有效地区分基因型。根据80个基因型的4个收获，估计了重复性系数和测定系数。主成分法通过协方差矩阵获得可重复性系数的最高估计值，主成分法表达了每个测量对之间的相关性。实际个体值的预测精度为65.32% ~ 81.59%，从第六次收获开始基本保持不变。

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

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 The article must be unpublished.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.