INTERCHARACTER RELATIONSHIPS AND TRAIT PROFILES IN PVA MAIZE (Zea mays L.)

Authors

  • R. O. OLAYIWOLA ollyrichie@gmail.com
  • K. M. JOLAOSHO
  • O. A. OYETUNDE
  • O. A. OGUNTADE
  • A.A. OLAYIWOLA
  • O. J. ARIYO

Keywords:

grain yield, path analysis, selection index, trait profiles

Abstract

Understanding the intercharacter relationships between grain yield and related traits is crucial in developing selection index for yield improvement of crops. Forty-five PVA maize genotypes were evaluated
in Nigeria to examine interrelationships among agronomic characters of PVA maize genotypes and
identify trait(s) that significantly contribute to grain yield. The field experiment was laid out in a randomized incomplete block design (RIBD) replicated three times. Observations were made on grain yield
and other agronomic traits. There was significant (p ≤0.05, 0.01) genotypic effect for most of the
measured traits. Grain yield was significantly correlated with plant height, ear height, husk cover, plant
aspect and ear aspect. However, these characters were correlated inter se. Ear aspect highly influenced associations with grain yield and should therefore be weighted accordingly in the selection index. The Genotype × yield-trait (GYT) biplot identified genotypes LY1409-61, A1804-15, and LY1913-
23 as having superior trait profiles and could be useful in future breeding strategies.

Author Biographies

R. O. OLAYIWOLA, ollyrichie@gmail.com

Department of Crop Production, College of Agricultural Sciences, Olabisi Onabanjo
University, Ago-Iwoye, Nigeria

K. M. JOLAOSHO

Department of Crop Production, College of Agricultural Sciences, Olabisi Onabanjo
University, Ago-Iwoye, Nigeria

O. A. OYETUNDE

Department of Horticulture and Landscape Management, College of Agriculture, Lagos
State University of Science and Technology, Ikorodu, Nigeria

O. A. OGUNTADE

Department of Agronomy, University of Ibadan, Nigeria

A.A. OLAYIWOLA

Department of Crop Production, College of Agricultural Sciences, Olabisi Onabanjo
University, Ago-Iwoye, Nigeria.

O. J. ARIYO

Department of Plant Breeding and Seed Technology, Federal University of Agriculture
Abeokuta, Nigeria

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Published

2024-03-26

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