Performance of variety mixtures in transplanted rice (Oryza sativa L.)

Date

7-2015

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Hernandez, Jose E.

Restrictions

Restricted: Not available to the general public and to those bound by the confidentiality agreement. Access is available only after consultation with author/thesis adviser.

Abstract

An experiment was conducted to evaluate the performance of 11 different variety mixtures using five selected irrigated lowland varieties of rice namely: NSIC Rc 140, NSIC Rc 150, NSIC Rc 152, NSIC Rc 160, and NSIC Rc 216 as components under transplanting method of seed establishment during wet season of 2014. Yields of variety mixtures fall in between the minimum and maximum yields obtained in pure stand of component varieties. Higher yield was obtained in variety mixtures than when component varieties were grown in pure stands. The use of higher yielding varieties like NSIC Rc 152 and NSIC Rc 216 as components for variety mixture increases the tendency for higher yield production in mixtures. Incidence of rice tungro virus (RTV) disease was reduced when varieties were planted in mixtures. VM7 gained the highest yield and was the best performing among variety mixtures tested. This mixture consisted of 25% each NSIC RC 140 and NSIC Rc152 which both had the lowest RTV infection and NSIC Rc 150 and NSIC Rc160 which had the highest RTV infection in pure stands. The differential reaction of the component varieties tends to counteract the effect of RTV on the overall yield of mixtures. Results however, indicate that one resistant variety in a mixture of 4 component varieties may not be able to counteract the effect of RTV in the stands. Plant height and maturity of variety mixtures lie in between the range between the minimum and maximum plant heights and maturity of their component varieties in pure stands.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2015 A3 A85

Notes

Status: in process

loc: Cataloging section

Document Type

Thesis

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