Rice (Oryza sativaL.) Seed Quality after Storage in the Humid Tropicsand after Accelerated Aging

Authors

  • Pongsit Chor-unchun Agricultural Innovation and Management Division, Faculty of Natural Resources, Prince of Songkla University, Hat Yai Campus,Hat Yai,Songkhla 90112, Thailand.
  • Vichai Wongvarodoma Agricultural Innovation and Management Division, Faculty of Natural Resources, Prince of Songkla University, Hat Yai Campus,Hat Yai,Songkhla 90112, Thailand.

Keywords:

accelerated aging, germination, rice seed, seed storability

Abstract

Accelerated aging test (AA) has been applied as a technique to evaluate seed vigor and to predict seed storability. This study evaluated the storability and vigor of Sang Yod Phatthalung, Leb Nok Pattani,and Chaing Phatthalung rice seeds by the AA. The seeds were subjected to AA at 42, 44, 46, and 48°C for durations of 48, 72, 96, and 120 h at 100% relative humidity. The seeds were stored in woven plastic bags at room temperature (28±1°C) for 12 months, and were sampled for physical and physiological quality tests every two months. The results showed that Sang Yod Phatthalung, Leb Nok Pattani, and Chaing Phatthalung rice seeds had 94.75-97.25% germination and 9.05-9.98% seed moisture content, and could be stored in the humid tropics for six months with above 80% germination. It suggests that the appropriate AA conditions for the evaluation of rice seed storability in the humid tropics should be done at 46°C for 96 h and 100% relative humidity. This aging regime gave seed vigor separation among varieties with a germination gap of about 10%, while a greater classification (10-30%) occurred after aging at 44°C for 120 h. These AA regimes (46°C for 96 h) serve as a potential tool for predicting the seed storability and classifying rice seeds by their vigor.

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Published

2024-12-17

How to Cite

Chor-unchun, P., & Wongvarodoma, V. (2024). Rice (Oryza sativaL.) Seed Quality after Storage in the Humid Tropicsand after Accelerated Aging. Recent Science and Technology, 17(1), 259351. Retrieved from https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/259351