Correlation estimates and assessment of selection strategies in five soybean populations

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI:10.12702/1984-7033.V03N02A03

R. Backes, M. Reis, C. Cruz, T. Sediyama, C. Sediyama

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引用次数: 6

Abstract

The objectives of the study were to analyze correlation among some important traits for breeding and assess three family selection strategies in soybean populations. Five soybean populations were assessed, three in the F 6 generation and two in the F 5 generation in Vicosa, MG, in the 1997/98 growing season. The experiment involved non replicated families inserted with replicated controls to allow estimation of the environmental component associated to the phenotypic variance of the studied populations. This arrangement allows the estimation of genetic parameters. The estimates of genetic correlation showed that the number of pods per plant is a good indicator of grain yield. The estimates of the gains from simulation of the three selection strategies showed that the direct selection on yield strategy resulted in greatest gains for the same trait but indirect selection via number of pods per plant resulted in gains close to those of direct selection. Selection based on the Pesek and Baker index enabled grain yield gains and simultaneous reduction in the cycle and plant height, despite the positive correlation of these two traits with grain yield.

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5个大豆居群的相关性估计及选择策略评价

本研究的目的是分析一些重要性状之间的相关性，并评价大豆群体的三种家庭选择策略。在1997/98生长季，对5个大豆群体进行了评价，其中3个为f6代，2个为f5代。实验涉及插入重复对照的非重复家族，以便估计与研究群体表型变异相关的环境成分。这种安排允许估计遗传参数。遗传相关估计表明，单株荚果数是籽粒产量的良好指标。通过对三种选择策略的模拟估算，结果表明，直接选择产量策略对同一性状的增益最大，而间接选择单株荚果数的增益与直接选择的增益相近。基于Pesek和Baker指数的选择使籽粒产量增加，同时降低了周期和株高，尽管这两个性状与籽粒产量呈正相关。

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.