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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Journal of Tropical Crop Science
Rahmawati, Rika Sri
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Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Assessment of Yellow and White Fleshed Cassava Tuberous Root Cultivars Reveals Different Responses to Post-harvest Physiological Deterioration Rahmawati, Rika Sri; Fathoni, Ahmad; Sukma, Dewi; Ardie, Sintho Wahyuning; Sudarsono, Sudarsono
Journal of Tropical Crop Science Vol. 11 No. 01 (2024): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jtcs.11.01.64-73

Abstract

Identification of post-harvest physiological deterioration (PPD) tolerance in cassava is crucial, as PPD significantly hampers the cassava tuberous root industry by shortening storage periods post-harvest and diminishing product quality. Characteristics linked to PPD tolerance encompass high carotenoid levels and low dry matter content (DMC). This study aimed to evaluate the PPD responses of six yellow fleshed and ten white-fleshed cassava tuberous roots and determine the source of PPD tolerance. PPD and DMC assessments were conducted using standard methods at three storage periods: 2, 5, and 10 days after harvest (DAH). The k-means clustering analysis revealed six clusters, each corresponding to distinct PPD symptom patterns and tolerance statuses. Cluster 1, comprising three yellow-fleshed and three white-fleshed cassava cultivars, demonstrated PPD tolerance with minimal symptoms up to 5 DAH. Clusters 2 and 3 exhibited a moderate PPD response with elevated symptoms at 5 DAH, comprising three yellow-fleshed and three white-fleshed cassava cultivars. Clusters 4 to 6 displayed a sensitive response to PPD, showcasing a significant increase in symptoms at 5 and 10 DAH, with four white-fleshed cassava cultivars identified within this cluster. These findings underscored the presence of PPD tolerance in both yellow-fleshed and white-fleshed cassava tuberous roots. The correlation between PPD and DMC was significant only at 2 DAH, displaying a moderate positive correlation. Consequently, this study identified three cultivars, “Carvita-25”, “Manggu”, and ““Ubi Kuning””, with high DMC and low PPD incidence at 5 DAH, suggesting their suitability for further breeding programs.
Uji Ketahanan Penyakit Layu Bakteri Secara In Vitro dan Uji Daya Hasil Genotipe Kentang IPB Rahmawati, Rika Sri; Syukur, Muhamad; Maharijaya, Awang
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 49 No. 2 (2021): Jurnal Agronomi Indonesia
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 | Full PDF (381.512 KB) | DOI: 10.24831/jai.v49i2.35639

Abstract

Konsumsi kentang di Indonesia terus meningkat namun belum sepenuhnya diperoleh dari dalam negeri. Hal ini disebabkan produktivitas kentang nasional masih rendah akibat kultivar impor yang tidak adaptif. Perakitan kultivar yang berpotensi hasil tinggi dan tahan penyakit layu bakteri merupakan upaya untuk meningkatkan produksi kentang. Penelitian ini bertujuan untuk mengetahui tingkat ketahanan penyakit layu bakteri secara in vitro dan potensi hasil genotipe kentang IPB. Penelitian dilakukan di laboratorium Pusat Kajian Hortikultura Tropika (PKHT) IPB untuk uji ketahanan penyakit dan di lahan pertanaman kentang milik petani di Pangalengan, Kabupaten Bandung untuk uji daya hasil pada bulan Januari sampai Juni 2018. Sebanyak tujuh genotipe uji yang terdiri dari terdiri dari PKHT 4, PKHT 6, PKHT 9, PKHT 10, PKHT 12, Intan, dan Medians, serta dua pembanding yaitu Atlantik dan Granola digunakan dalam penelitian ini. Uji ketahanan penyakit layu menggunakan metode in vitro dengan cara menginokulasi plantlet dengan metode gunting pucuk dilanjutkan dengan mengamati periode inkubasi, tingkat kejadian penyakit dan derajat ketahanan. Adapun uji daya hasil dilakukan dengan cara membandingkan pertumbuhan tanaman dan produksi umbi di lapangan. Hasil uji ketahanan menunjukkan genotipe PKHT 4 dan PKHT 9 mempunyai tingkat ketahanan, yaitu agak tahan, yang lebih baik dibandingkan Atlantik dan Granola sebagai kultivar pembanding. Uji daya hasil menunjukkan terdapat dua genotipe yang memiliki potensi hasil tinggi yaitu PKHT 6 (38.91 ton ha-1) PKHT 10 (28.75 ton ha-1) yang melebihi Atlantik dan Granola sebagai pembanding. Kata kunci: kultivar, produktivitas, Ralstonia solanacearum, seleksi in vitro, Solanum tuberosum
Co-Authors Ahmad Fathoni Awang Maharijaya Dewi Sukma Muhamad Syukur Sintho Wahyuning Ardie Sudarsono