The influence of drying methods and storage conditions on the seed viability and longevity of mestizo hybrid rice

Issue Date

12-2006

Abstract

The Philippine Seed Board released a hybrid rice variety, PSB Rc72H, commonly named Mestizo, in 1997. The unique characteristics of its F1 seed, such as partly open hull with thinner caryopsis, thus lighter weight, presented challenges in drying and storing the seed to maintain its viability for a longer duration. This study determined the effects on seed viability and longevity of three drying methods: sun-drying, dehumidified air-drying, and heated air-drying; three storage conditions: ambient warehouse, air-conditioned, and cold storage room; and storage duration. Cleaned, dried seeds were packed into 10-kg woven polypropylene bags, and initially tested for germination. Monthly germination tests were done thereafter. The viability of Mestizo seeds dried using any of the three methods and then stored either in ambient or air-conditioned room sharply declined after 4 mo of storage. Dehumidified air-dried and sun-dried Mestizo seed can be stored under ambient warehouse conditions for 6 mo, with its viability still about the minimum national standard germination rate of 85%. Dehumidified air-dried seeds kept in cold storage had the highest viability (95%) at the end of 6 mo. Regardless of drying method, keeping the seeds in cold storage can maintain germination at 85-90% for 8 mo.

Source or Periodical Title

Philippine Agricultural Scientist, The (Formerly: The Philippine Agriculturist)

ISSN

0031-7454

Volume

89

Issue

4

Page

309-318

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Frequency

quarterly

Physical Description

illustrations ; graphs ; tables ; references

Language

English

Subject

drying, germination rate, hybrid rice, longevity, seed, storage

En – AGROVOC descriptors

ORYZA; RICE; HYBRID RICE; DRYING; STORAGE; LONGEVITY; KEEPING QUALITY

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