鉴定木薯材料对炭疽病和细菌病抗性的参数和遗传变异

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY Pesquisa Agropecuaria Brasileira Pub Date : 2022-01-01 DOI:10.1590/s1678-3921.pab2022.v57.02790
Leandro Escobar Dalarosa, L. M. C. Davide, M. C. Gonçalves, L. M. A. Bacchi, Adriano dos Santos, A. G. Guimarães, José Leonardo da Silva, Rogério Catarino Lima da Costa, Gabriela Aparecida de Almeida Amorim
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引用次数: 0

摘要

摘要本研究的目的是估计田间栽培木薯(Manihot esculenta)基因型的遗传参数,以及它们之间的遗传差异,以确定哪些基因型对炭疽病和细菌病的抗性更强。进行了3个独立试验,对分布在5个小区的133份木薯材料和9个商品品种进行了评价,每个试验每亩5株。在第一个试验中,用相黄单胞菌接种植株。manihotis(细菌病)。二是接种炭疽炭疽菌(炭疽病)。在第三个实验中,采用增强块设计,在自然发生疾病的情况下,使用评分量表对植物进行视觉评估。以遗传力为遗传参数,采用算术平均的非加权对群法确定遗传散度和聚类。在第三个试验中,检测了遗传变异,并对炭疽病和细菌病的疾病进展曲线下面积(AUDPC)进行了评估。在细菌病的第一次和第三次试验中,由于获得了高遗传力值,抗性材料选择成功的机会较高。BGM-1170和BGM-1134的AUDPC平均值最低,被认为对炭疽病和细菌病具有抗性。
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Parameters and genetic divergence to identify resistance to anthracnose and bacteriosis in cassava accessions
Abstract The objective of this work was to estimate the genetic parameters of cassava (Manihot esculenta) genotypes cultivated in the field, as well as the genetic divergence between them, in order to identify which ones show a greater resistance to anthracnose and bacteriosis. Three independent experiments were carried out, evaluating 133 accessions and nine commercial cultivars of cassava distributed in five blocks, with five plants per plot in each experiment. In the first experiment, the plants were subjected to inoculation with Xanthomonas phaseoli pv. manihotis (bacteriosis). In the second, the plants were subjected to inoculation with Colletotrichum gloeosporioides f. sp. manihotis (anthracnose). In the third, carried out in an augmented block design and under naturally occurring diseases, visual evaluations of the plants were performed using a rating scale. Heritability was used as a genetic parameter, and the unweighted pair group method with arithmetic mean was applied to determine genetic divergence and clustering. In the third experiment, genetic variability was detected among accessions, which were evaluated for the area under the disease progress curve (AUDPC) for anthracnose and bacteriosis. In the first and third experiments of bacteriosis, the chances of success in the selection of resistant accessions are higher due to the high heritability values obtained. The BGM-1170 and BGM-1134 accessions show the lowest mean for AUDPC and are considered resistant to anthracnose and bacteriosis.
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来源期刊
Pesquisa Agropecuaria Brasileira
Pesquisa Agropecuaria Brasileira 农林科学-农业综合
CiteScore
1.20
自引率
0.00%
发文量
45
审稿时长
9-18 weeks
期刊介绍: Pesquisa Agropecuária Brasileira – PAB – is issued monthly by Empresa Brasileira de Pesquisa Agropecuária – EMBRAPA, affiliated to Ministry of Agriculture, Livestock and Food Supply. PAB publishes original scientific-technological articles on Plant Physiology, Plant Pathology, Crop Science, Genetics, Soil Science, Food Technology and Animal Science. Its abbreviated title is Pesq. agropec. bras., and it should be used in bibliographies, footnotes, references and bibliographic strips.
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