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All Journal AGRIVITA, Journal of Agricultural Science
Kumar, Ajay Goel
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Agriculture, Biological Sciences & Forestry

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Genome Wide Association Study Identifies Candidate Loci or Genes Responsible for Bacterial Stalk Rot Resistance in Maize Mienanti, Devi; Hidayat, Iqbal; Danaatmadja, Yanuar; Belaffif, Mohammad Bahrelfi; Waluyo, Budi; Sugiharto, Arifin Noor; Kumar, Ajay Goel; Kuswanto, Kuswanto
AGRIVITA Journal of Agricultural Science Vol 46, No 3 (2024)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v46i3.4525

Abstract

Bacterial stalk rot (BSR) disease is caused by Dickeya zeae, where infection on maize could lead to an enormous yield loss. Although curative action to control BSR infection can be done using bactericides, preventing the establishment of infection is still the best approach in minimizing potential yield loss. Among the different methods in preventing BSR infection, the use of resistant maize hybrid is considered the best approach. In this study, Genome Wide Associated Study (GWAS) was employed to find SNP markers associated with BSR resistance in maize. Six hundred twenty four lines were divided into two observation groups and further phenotyped for BSR resistance at 5, 10, and 15 days after inoculation (DAI) with BSR. GWAS was performed in a time-series manner using MLM (Mixed Linear Model) controlling for population structure and kinship. We found one SNP marker in chromosome 2 displaying significant association to BSR resistance spanning the entire observation periods. We also found SNP markers with significant association to BSR spanning two consecutive observation days located in chromosome 2 and 5. These results would hopefully contribute to the development of hybrid maize with better resistance against BSR.
Large-Scale Evaluation of Indonesian Elite Maize Breeding Lines for Resistance Against Bacterial Stalk Rot Caused by Dickeya zeae Mienanti, Devi; Hidayat, Iqbal; Danaatmadja, Yanuar; Belaffif, Mohammad Bahrelfi; Waluyo, Budi; Sugiharto, Arifin Noor; Kumar, Ajay Goel; Kuswanto, Kuswanto
AGRIVITA Journal of Agricultural Science Vol 46, No 1 (2024)
Publisher : Faculty of Agriculture University of Brawijaya in collaboration with PERAGI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17503/agrivita.v46i1.4350

Abstract

Bacterial stalk rot is one of the important diseases in maize caused by Dickeya zeae. Infection of this disease can lead to a considerable amount of loss in yield, with up to 98 percent loss of yield. The use of resistant materials is the most effective approach to managing bacterial stalk rot in maize. This study evaluates a large-scale phenotypic screening of 624 maize lines against bacterial stalk rot, divided into two groups based on a heterotic pool. These lines are used in a commercial breeding program in Indonesia. This study develops a stabbing method with a large gauge hypodermic needle, allowing for scalability in delivering inoculum while performing large-scale line evaluation. The result from ANOVA reveals a significant (P<0.05) effect of lines, day after infection, and interaction between day after infection and group. Group two displays fewer resistant lines compared to group one. This work presents a method for large-scale line evaluation for resistance against bacterial stalk rot, where the information obtained can be used in industrial breeding programs for routine material screening during the development of new lines or hybrids and for genomic studies of bacterial stalk rot resistance.
Co-Authors Arifin Noor Sugiharto Belaffif, Mohammad Bahrelfi Budi Waluyo hidayat, iqbal Kuswanto Kuswanto Mienanti, Devi Yanuar Danaatmadja, Yanuar