Not just your ordinary rice: genetic purity testing on breeder seeds affected by post-harvest handlings through grow-out testing

Issue Date

7-2018

Abstract

Poor seed quality: slow germination, weak seedlings, and mixed or genetically contaminated lots cannot lead to a uniform crop production and therefore lead to farmers' lower income. Experiment was conducted under irrigated condition during WS of 2017 in a RCBD with three replications at PhilRice CES to evaluate the effect of postharvest practices to purity and quality of the variety. Samples were collected each after threshing, drying and cleaning and examined in laboratory for varietal purity testing then tested through Grow-out Testing to further confirm the test results in the lab. Field inspection was conducted 20 days after transplanting; maximum tillering; on-set of flowering; and two weeks before harvest. Genetic purity through visual evaluation was scored based on base colors, plant heights, days to heading and rain shape. Commonly recorded off-types are purple-based plant, with long awn, taller plants, early heading and late maturity. Off-types observed may be caused by improper post-harvest handling. Inadequately performed threshing, drying and cleaning operations contribute to increased losses and low seed quality. It is recommended therefore that post-harvest deserves special attention, machines and equipment are maintained clean with responsible people in operation.

Source or Periodical Title

Philippine Journal of Crop Science

ISSN

0115-463X

Volume

43

Issue

Supplement no. 1

Page

114-115

Document Type

Article

College

College of Agriculture and Food Science (CAFS)

Language

English

Subject

Rice; Rice seeds

En – AGROVOC descriptors

ORYZA SATIVA; RICE; SEEDS; QUALITY; POSTHARVEST TECHNOLOGY; TESTING; WET SEASON

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