Evaluation of growth and morphology of white corn (Zea mays L.) half sib populations under excessive soil moisture conditions

Date

4-2013

Degree

Bachelor of Science in Agriculture

Major Course

Major in Agronomy

College

College of Agriculture and Food Science (CAFS)

Abstract

This study presents the results of the evaluation of the growth and morphology of fifty half sib families of IPB VAR6 white corn variety grown under waterlogging conditions. The families were evaluated with two screenings under waterlogging conditions at different growth stages: at early seedling stage, and during late vegetative V6 ? V7 stage. Survival percentage, dry matter content, plant height, root volume, number of ears and dry matter partitioning coefficients were evaluated. In the first screening, significant differences were observed in almost all the parameters measured. The families were ranked based on their performance and the top ten performing families were entered into the second screening. Waterlogging stress at vegetative stress resulted in increase in the root volume and root dry weights among the half sib families. Families 33 and 34 showed 7% and 31% increase in root volume and an increase of 29% and 31 % in root dry matter respectively. Partitioning of dry matter to roots was also higher in flooded plants. In addition, formation of adventitious roots was observed in several families, showing that roots play an important role in tolerance to flooding at vegetative stage. Thus, root growth measurements can be used in the selection of waterlogging tolerant families of IPB-VAR6 corn. It was also observed that flooding induced early maturity in corn as observed with more flower dry matter and higher number of corn ears per plant. Results also show that variation in flooding tolerance can be found among half sib families, and that this variation can be exploited in developing waterlogging stress tolerant corn populations.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

LG 993.5 2013 A3 /R49

Document Type

Thesis

This document is currently not available here.

Share

COinS