Pollen transport in corn: effects of distance and other agents

Issue Date

10-2003

Abstract

The outcrossing rate in yellow x white corn (Zea mays Linn) was studied. Plant populations were established in a donor field of 33,000 m2 and in the acceptor field surrounding the donor field. Isolation distances of 10,20,30,40, 50 and 60m were provided starting from the edge of the donor field positioned to the North, East, West, and 10 m interval across 160 m length oriented towards South direction. At harvest, actual plant stand was assessed and individual corn ears were evaluated in terms of percent outcrossing incidence. Results showed decreasing percentage of outcrossed grains at 60m and beyond regardless of direction. Outcrossing ranging from 1.68% to 3.48% was observed at 10m in four pollen directional flows. There were no outcrossed grains observed at 160 m isolation distance. Insect pollinators were not abundant or population density was insufficient to affect pollination. At 160m and beyond, the acceptor plants were free from outcross occurrence. Correlation between isolation distance and wind direction was highly significant.

Source or Periodical Title

Philippine Entomologist

ISSN

0048-3753

Volume

17

Issue

2

Page

183

Document Type

Article

Frequency

semi-annually

Language

English

En – AGROVOC descriptors

ZEA MAYS; MAIZE; POLLEN; OUTCROSSING; PLANT POPULATION

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