Variation in Agronomic and Grain Characters in Six Lowland Rice Varieties

Date

10-1978

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Tomas M. Masajo

Abstract

A field experiment was conducted during the dry season of 1978 at the Central Experiment Station, University of the Philippines, Los Banos (UPLB) to determine the variability in agronomic and grain characters of UPLB rice varieties C12, C4-63G, C4-137, C22, C168-134 and UPL RI-1. Two levels of applied nitrogen were used, 90 and 120 kg/ha.

The mean 100-grain weights of the top and middle portion of the panicle were found not significantly different from each other but significantly higher than that of the bottom portion.

Variability in gain length, grain width, and panicle length was as follows: among panicles within hills > among hills within plots> among plots. Variance among panicles was highest for panicle length and finally by grain width. in the magnitude of variability among panicles for grain length and grain width, the varieties could be arranged in decreasing order as follows: UPL Ri-1, C4-137, C22, C168-134 and C12.

For 100-grain weight of the top, middle and basal portions of a panicle, number of grains/panicle, number of panicle and plant height, coefficient of variation was consistently greater among hills than among plots. Higher coefficient of variation among hills was obtained at 120 N than at 90 N for all characters in all varieties.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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