Validation of the Filipino Version of the Eustachian Tube Dysfunction Questionnaire-7 (ETDQ-7).

Introduction The Eustachian tube (ET) serves various functions, such as pressure regulation, mucociliary clearance, and middle ear protection. Eustachian Tube Dysfunction (ETD) pertains to a problem with the ventilatory function of the Eustachian tube and is a common condition seen in the ENT clinic. There is currently no gold standard in diagnosing ETDs, but numerous measures are being employed and studied.

Origins of Susceptibility to Insect Herbivores in High-Yielding Hybrid and Inbred Rice Genotypes.

Several studies have reported higher damage from insect herbivores to hybrid compared to inbred (pure line) rice. We used a collection of 20 hybrid and 12 inbred genotypes from diverse origins to test the hypotheses that hybrid rice susceptibility is due to (a) the hybrid plant type and/or (b) rice phylogeny. We challenged the genotypes with (BPH), (WBPH) and (YSB) in greenhouse and screenhouse bioassays and monitored herbivores in field plots.

Heterosis for Interactions between Insect Herbivores and 3-Line Hybrid Rice under Low and High Soil Nitrogen Conditions.

Hybrid rice results from crossing a male-sterile line (the A line) with a pollen doner (the restorer or R line). In 3-line hybrid breeding systems, a fertile B line is also required to maintain A line populations. Heterosis is defined as a condition of traits whereby the hybrid exceeds the average of the parental lines.

Heterosis for Resistance to Insect Herbivores in a 3-Line Hybrid Rice System.

Three-line hybrid rice is produced by crossing male sterile (A line) rice with a fertility-restorer (R line). Fertile lines (B lines) are also required to maintain A line seed for breeding programs. We used a range of hybrids and their parental lines to assess the frequency and nature of heterosis for resistance to the whitebacked planthopper (), brown planthopper () and yellow stemborer ().