Field sereening of Paraguayan soybean germplasm for resistanee to charcoal rot

Agriscientia

article

M. A. Fernández Gamarra¹  M. Mohan Kohli²  R. Scholz Drodowski¹  M. J. Vargas³  R Agüero⁴  M. Riveros³  A. D. Sanabria Velázquez⁵  G. A. Enciso Maldonado⁵ 

[1] Instituto Paraguayo de Tecnología Agraria;Cámara Paraguaya de Exportadores y Comercializadores de Cereales y Oleaginosas;Instituto de Biotecnología Agrícola;Universidad San Carlos Filial Encarnación;Centro de Desarrollo e Innovación Tecnológica de Itapúa

关键词: Macrophomina phaseolina;    plant genetic resources;    genetic resistance;    soilborne diseases;   

DOI  :  10.31047/1668.298x.v39.n2.36896

学科分类：社会科学、人文和艺术（综合）

来源: Universidad Nacional de Cordoba * Facultad de Ciencias Agropecuarias

【 摘 要 】

The aim of this work was to identify genetic resistance to charcoal rot(Macrophomina phaseolina) in soybean germplasm from the National BreedingProgram of the Instituto Paraguayo de Tecnología Agraria (ParaguayanInstitute of Agricultural Technology). During two seasons, 51 commercial andexperimental lines from the local breeding program were field evaluated inItapúa-Paraguay. The lines were planted in single rows previously infested,using a completely randomized block design with four repetitions. Thecharcoal rot severity was evaluated in the stems and roots at the physiologicalmaturity stage. On a Root and Stem Severity index scale of 1-5, the medianseverity for the 34 early maturity genotypes was 1.5 and 1 in 2017/2018 and2018/2019, respectively. Nine genotypes (AG-6525 xi, SP14041, SP14222,SP14583, SP15013, SP15133, SP15218, SP16020, and SPB-14146) were ratedas resistant (1) in both evaluations. The median severity for the 15 semi-earlygenotypes was 2 and 1 in 2017/2018 and 2018/2019, respectively. This studyallowed us to identify previously unreported sources of resistance to charcoalrot in maturity group IV, V and VI. We believe that germplasm screening underfield conditions is a viable alternative to identify breeding lines which are lesssensitive to charcoal rot.

【 授权许可】

CC BY-SA