Specialty Rice ( Oryza sativa L.) with High and Stable Grain Yield under Rainfed Lowland Conditions

Ace Mugssy L. Agustin, Jeremias L. Ordonio, Marie Bie S. Natividad, Nonawin B. Lucob-Agustin, Roel R. Suralta, Hiroshi Ehara, Shiro Mitsuya and Mana Kano-Nakata ()
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Ace Mugssy L. Agustin: Department of Crop Science, College of Agriculture, Central Luzon State University, Science City of Muñoz 3120, Philippines
Jeremias L. Ordonio: Department of Crop Science, College of Agriculture, Central Luzon State University, Science City of Muñoz 3120, Philippines
Marie Bie S. Natividad: Department of Crop Science, College of Agriculture, Central Luzon State University, Science City of Muñoz 3120, Philippines
Nonawin B. Lucob-Agustin: Crop Biotechnology Center, Philippine Rice Research Institute, Science City of Muñoz 3119, Philippines
Roel R. Suralta: Crop Biotechnology Center, Philippine Rice Research Institute, Science City of Muñoz 3119, Philippines
Hiroshi Ehara: International Center for Research and Education in Agriculture, Nagoya University, Nagoya 464-8601, Japan
Shiro Mitsuya: Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya 464-8601, Japan
Mana Kano-Nakata: International Center for Research and Education in Agriculture, Nagoya University, Nagoya 464-8601, Japan

Agriculture, 2023, vol. 13, issue 10, 1-20

Abstract: This study aimed to identify superior genotypes of specialty rice (SR) with comparable or higher grain yield than the drought-tolerant check variety under rainfed and controlled-drought conditions. A total of 17 SR varieties (six aromatic, six pigmented, five glutinous) and a drought-tolerant check variety with ordinary grain quality were evaluated under rainfed lowland and controlled-drought conditions from 2019 to 2021 at Central Luzon State University in the Philippines. Among the SR varieties, aromatic NSIC Rc344, pigmented Black rice, and glutinous NSIC Rc15 had comparable or higher grain yield than the drought-tolerant check variety under both rainfed and controlled-drought conditions. These selected genotypes were classified as the highest yielding, with a more stable yield than the drought-tolerant check variety across the hydrological conditions based on the BLUPs productivity and stability test and drought tolerance indices. The selected SR varieties had a greater panicle number (NSIC Rc344), more grains per panicle (NSIC Rc15), and a higher 1000-grain weight and harvest index (Black rice). In comparison to a higher yield but with a higher market price due to the superior grain quality of the identified SR than the drought-tolerant check variety, the net income in rainfed lowland conditions significantly increased by 69–108%. These results suggest that planting good-performing SR in rainfed lowlands can increase profitability in this ecosystem due to the higher market price compared to ordinary drought-tolerant varieties.

Keywords: aromatic; pigmented; glutinous; drought; grain quality; rice profitability (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2023
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