Joint scaling test to estimate genetic parameters of soybean resistance to frogeye leaf spot

IF 1.3 4区农林科学 Q3 AGRONOMY

Crop Breeding and Applied Biotechnology Pub Date : 2003-03-30 DOI:10.12702/1984-7033.V03N01A08

G. Gravina, S. M. Filho, C. Sediyama, C. Cruz

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引用次数: 1

Abstract

To study the inheritance of soybean resistance to Cercospora sojina Hara, genetic parameters were estimated using means and variances of populations derived from a cross between a resistant and a susceptible cultivar, namely, ‘Uberaba’ and ‘Bossier’, respectively. The parents and the F 1 , F 2 , BC 1 and BC 2 generations were evaluated for six characteristics associated with the disease: visually evaluated infection degree; number of lesions per leaflet; lesion mean diameter; percentage of lesioned leaf area, number of lesions per square centimeter and disease index. The additive genetic effect was the most important in the determination of all traits related to soybean resistance to frogeye leaf spot. The infection degree, a subjective trait that considers the set of all resistance related characteristics in its constitution, presented positive variance and lower influence of the environment, consisting in a useful variable in programs of soybean breeding aiming at the resistance to C. sojina. All traits presented at least one type (aa, ad or dd) of significant epistatic interaction and the full model (additive + dominant + epistatic) was more adequate to describe the resistance.

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大豆抗蛙斑病遗传参数的联合结垢试验研究

为了研究大豆对大豆斑孢虫的抗性遗传，利用抗性品种“Uberaba”和敏感品种“Bossier”的杂交群体的平均值和方差估计了遗传参数。对亲本及f1、f2、bc1和bc2代进行6个与疾病相关的特征评价:目测感染程度;每小叶的病变数;病变平均直径;病变叶面积百分比，每平方厘米病变数和疾病指数。在大豆抗蛙斑病相关性状的测定中，加性遗传效应最为重要。侵染度是一种主观性状，考虑了其构成中所有抗性相关性状的集合，呈正方差，受环境影响较小，是大豆抗病育种计划中一个有用的变量。所有性状均表现出至少一种显著的上位性互作类型(aa、ad或dd)，全模型(加性+显性+上位性)更适合描述抗性。

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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.