Variation Among Sublines from a Single Anther Culture Derived Rice (Oryza Sativa) Regenerant

Date

11-1993

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Teresita H. Borromeo

Abstract

A study was conducted to determine the variability among sublines extracted from R2 population obtained from an anther culture derived regenerant of rice. Sublines were formed based on plant height following a nested design. There were eight sets of sublines in the R4 generation evaluated using a randomized complete block design with three replications.

Significant differences in grain yield, grain width and seed size ratio were observed between DH groups while significant differences among subgroups/DH groups were found only in 100 seed weight. Variation in grain yield, days to heading, plant height, number of productive tillers and panicle length were noted among samples/subgroups while variation among sublines/samples were observed in grain yield, days to heading, plant height, number of productive tillers, 100 seed weight, panicle length, spikelet sterility and grain length.

All sets of tall sublines, except one, were significantly taller than their short sister sublines. Short sublines in two sets yielded more than tall sublines while tall sublines in four sets flowered later than short sublines. Variation in number of productive tillers was found significant in one set while two sets showed significant differences in 100 seed weight. For panicle length and spikelet sterility, two sets showed significant differences while variation in grain length and grain width were noted in three and one set, respectively, the presence of variation between DH groups indicated that the regenerant originated from a mass of cells with different mutations. Variation between sublines indicated that the regenerant was haterozygous for genes controlling plant height and other agronomic characters.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

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