玉米抗炭疽病叶枯病混合遗传模型

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2004-03-30 DOI:10.12702/1984-7033.V04N01A19

V. Rezende, R. Vencovsky, F. Enrique, Ninamango Cárdenas, H. P. D. Silva, E. Bearzoti, Luís Eduardo, Aranha Camargo

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引用次数: 19

摘要

分离主基因效应和多基因效应对理解数量性状的遗传和预测杂交分离具有重要意义。采用混合遗传模型评价了稻瘟病病菌对白斑病抗性的遗传模式。选用了来自热带玉米自交系间4个杂交的p1、P2、F1、F2、BC1和BC2代。采用极大似然法选择最合适的遗传模型，估计遗传参数。混合模型表明，在所有杂交和试验中，对白斑病的抗性由一个主基因控制，至少在一个试验中由多基因控制。主基因和多基因的加性效应和显性效应都很重要。主基因的作用均为负向，说明主基因对抗病的贡献;多基因的作用均为正向或负向，反映了近交系间遗传背景的差异。

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Mixed inheritance model for resistance to anthracnose leaf blight in maize

A separation of the effects of major genes from effects of polygenes is important to understand genetic inheritance of quantitative traits and predict the segregation of a crossing. The inheritance mode of resistance to anthracnose leaf bligh t (ALB) caused by C. graminicola was evaluated by a mixed model. P 1, P2, F1, F2, BC1, and BC2 generations derived from four crossings between tropical maize inbred lines were used. Maximum likelihood was used to choose the best fitting inheritance model and to estimate genetic parameters. The mixed model indicated that the resistance to ALB was controlled by a major gene in all crosses and trials, and by polygenes in at least one trial. Additive and dominance effects were important for both major gene and polygenes. Both effects of the major genes were negative, indicating their contribution to disease resistance, while both effects of the polygenes were positive or negative, reflecting differences in the genetic background among inbred li nes.

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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.