General and specific combining ability of white maize (Zea mays L.) inbred lines.

Date

5-2012

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Adviser/Committee Chair

Salazar, Artemio M.

Abstract

This study was conducted to 1) evaluate the combining abilities of nine whitemaize inbred lines, 2) test the performance of its 36 hybrids within and across locations,3) to determine the extent of heterosis and 4) to form heterotic groupings. This study wasconducted in multiple locations, a single set at UPLB (2012- late dry season) and two setsat CMU (2011-wet season). Highly significant variation for traits such as days to tasseling, days to silking, stand count, number of ears harvested, ear length and yield was observed across entries for CMU Set 1 trial. For CMU Set 2 trial, entry means were significant for yield andhighly significant for days to tasseling, days to silking, anthesis-silking interval, ear length, ear diameter shelling percentage and moisture content. Entry means was observed to have high significant variations for traits stand count, ear length and ear diameter for UPLB trial. Across locations, the analysis of variance was found to be highly significant for days to silking, plant height, stand count, number of ears harvested, ear length, ear diameter, moisture content and yield. Significant treatment x location interaction was also observed for stand count, number of ears harvested and yield. The value obtained for Spearman’s rank correlation coefficient for yield was 0.16, which implied that the G x E was more of due to difference in magnitude of response of the genotypes to different environments rather than of the cross-over type.

Language

English

Location

College of Agriculture Crop Science Cluster

Call Number

Thesis

Document Type

Thesis

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