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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
sobir
Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University (Bogor Agriculture University), Jl. Meranti, Kampus IPB Dramaga, Bogor 16680, INDONESIA
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Optimizing the production of true shallot seed by inducing flowering in various shallot genotypes Cahyati Ramdhani; Awang Maharijaya; sobir; Arya Widura Ritonga
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 52 No. 3 (2024): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v52i3.58450

Abstract

Shallot (Allium cepa var. aggregatum) productivity can be enhanced through various methods, including using true shallot seed (TSS). Successful shallot breeding requires flowering to improve traits through gene transfer between genotypes and to produce TSS. However, one of the primary challenges in TSS production is the variability in the flowering ability of different varieties. This study aimed to examine the impact of flowering induction on flowering traits, pollen viability, and TSS production in several shallot genotypes. The study employed a randomized complete block design with two factors: shallot genotypes and induction treatments. The study found that vernalization treatment significantly increased the percentage of flowering plants in the Bauji, Bima Brebes, and Tajuk genotypes. Additionally, the combination of vernalization (V) and gibberellin (GA3) (V+G) successfully induced flowering in the Maja Cipanas genotype compared to the control. The Bima Brebes genotype exhibited the highest pollen viability following both vernalization and V+G treatment. Furthermore, vernalization also led to an increase in TSS weight in shallots. These findings suggest that vernalization could be an effective strategy for enhancing TSS production in highland areas, thereby supporting the development of high-yielding shallot varieties. Significant positive correlations were observed between TSS weight and several traits, including the percentage of flowering plants, umbel number, umbel diameter, flower number, pollen viability, percentage of plants producing TSS, capsule number, and TSS number. Keywords: Allium cepa; correlation; gibberellin; varieties; vernalization
Bulb selection of shallot local varieties from true shallot seeds (TSS) for bulb split components Linda Nursalma; Awang Maharijaya; Sobir
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 52 No. 3 (2024): Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy)
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24831/jai.v52i3.59795

Abstract

The development of quality shallot seeds from new superior varieties needs to be done because only about 10% of the shallot seed needs are currently covered. However, true shallot seeds (TSS) production from the local varieties, such as the Bima Brebes variety, is still rarely developed and has not been able to produce many split bulbs from TSS. The existence of split bulbs in one plant is preferred by consumers and is beneficial for shallot seedlings. This is related to the number of seeds farmers can use per kilogram of seed obtained. Therefore, this study aimed to select shallots that produce split bulbs from seeds produced from TSS. This research was conducted at Tajur Experimental Farm, Center for Tropical Horticulture Studies IPB University, Bogor. Seedlings were done in beds shaded with transparent plastic that can be opened and closed. The split bulbs produced by the Bima Brebes variety derived from TSS seed sources were still relatively low at 39.69% and significantly different from the comparison varieties at more than 60%. Sanren variety produced split bulbs from TSS seed sources as high as 64.13% and the Maserati variety about 61.25%. Keywords: spit bulb; dry weight; fresh weight; true shallot seed
Co-Authors Awang Maharijaya Cahyati Ramdhani Linda Nursalma Ritonga, Arya Widura