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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Journal of Tropical Crop Science
Iswari Saraswati Dewi
Balai Besar Bioteknologi dan Sumberdaya Genetika Pertanian Jl. Tentara Pelajar No. 3A Bogor 16111, Indonesia
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance

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Journal : Journal of Tropical Crop Science

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Early Identification of Potentially Drought-Tolerant Doubled Haploid Rice Lines During the Seedling Stage Munandar, Arief; Purwoko, Bambang Sapto; Dewi, Iswari Saraswati; Suwarno, Willy Bayuardi; Hadianto, Wira; Nurhidayah, Siti
Journal of Tropical Crop Science Vol. 12 No. 02 (2025): 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.12.02.346-357

Abstract

Climate change and reduced crop yields caused by drought stress have increased the demand for drought-tolerant varieties. The anther culture technique allows the production of improved varieties with high homozygosity in a short time. The study aimed to select the drought-tolerant double haploid lines at the seedling stage. This research was conducted in the greenhouse of the Indonesian Center for Agricultural Biotechnology and Genetic Resources Instrument Standard Testing (BBPSI Biogen), Bogor, from August to November 2023. The drought-tolerant selection of 12 doubled-haploid rice lines (AE1-AE12) and four check varieties, i.e., two commercial checks (“Inpari 18” Tadah Hujan Agritan or AE13, “Bioni63” Ciherang Agritan or AE14), one drought-tolerant check (“Salumpikit” or AE15), and one drought-sensitive check (“IR20” or AE16). The research used a randomized complete block design with three replications. The characters observed were leaf rolling, leaf drying, recovery ability, and plant fresh and dry weight. The Friedman test results showed that the lines with the lowest rankings, three lines (AE2, AE5, and AE12) with mild tolerant criteria for leaf rolling, five lines (AE1, AE2, AE5, AE8, and AE12) with mild tolerant criteria for leaf drying, and three lines (AE1, AE5, and AE12) with tolerant criteria for recovery ability. The selection index for drought tolerance at the seedling stage identified seven lines with positive values. Based on the Friedman test, selection index, and heatmap visualization, AE12, AE1, AE5, and AE8 exhibited a tolerance similar to “Salumpikit” and were deemed suitable based on drought tolerance characters.
Agronomic Performance and Selection of Doubled-Haploid Rice Lines for Rainfed Lowland Paddy Field da Cunha, Rojino; Purwoko, Bambang Sapta; Dewi, Iswari Saraswati; Suwarno, Willy Bayuardi
Journal of Tropical Crop Science Vol. 7 No. 03 (2020): 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.7.03.148-161

Abstract

Rainfed lowland rice cultivation is an alternative to increase national rice production. Breeding of high yielding rice varieties suitable for rainfed lowland condition can be accelerated by using doubled-haploid (DH) as genetic materials. This study aimed at obtaining information on the agronomic performance including yields in several DH rice lines and selecting DH lines suitable for rainfed lowland paddy field. The experimental design used was a Randomized Complete Block Design with 3 replications. The treatment was thirty DH lines and 4 check varieties namely RJ31 Ciherang, RJ32 Inpari 18, RJ33 Inpari 40, and RJ43 Inpari 41. The results showed that there were variability in all agronomic performances, i.e., plant height, number of tillers, days to heading and to harvest, panicle length, number of filled and empty grains, 1000-grain weight and grain yield. The DH lines, namely RJ19 DR8-43-3-1 and RJ25 DR10-14-1-1, gave the same productivity as 4 check varieties. Index selection showed that twelve DH lines with medium number of productive tillers, early maturing, and productivity of more than 4.40 tons.ha-1 were selected for further evaluation.
Co-Authors Bambang Sapta Purwoko da Cunha, Rojino Iskandar Lubis Munandar, Arief Purwoko, Bambang Sapto Siti Nurhidayah Willy Bayuardi Suwarno Wira Hadianto, Wira