Journal of
Plant Breeding and Crop Science

  • Abbreviation: J. Plant Breed. Crop Sci.
  • Language: English
  • ISSN: 2006-9758
  • DOI: 10.5897/JPBCS
  • Start Year: 2009
  • Published Articles: 447

Article in Press

Combining Ability and Heritability Estimates for Yield-Related Traits in Yellow Maize (Zea mays L.)

Ansah Gilbert

  •  Received: 23 February 2024
  •  Accepted: 31 May 2024
Despite the important role maize play in Ghana’s food security systems yield has been relatively low compared to other maize producing countries. The objective of this project is to provide information about GCA and SCA variances and effects, estimate heritability, maternal effect so as to identify and select suitable parents, superior cross combinations and the appropriate breeding procedure for yield improvement. Research method Two local genotypes NZER, HONAMPA and four PVA genotypes (DZIFO, AHOOFE, LY1203-20 and LY1501-6) were planted and mated on the field using Griffins diallel method I model I. The F1s and parents were evaluated in a 6*6 lattice design with three replications. Findings The study revealed significant high correlations between plant height, cob height and cob weight. General combining ability and specific combining ability mean squares were highly significant for cob height, plant height, leaf girth, number of kernels per row and cob weight. High GCA effects were revealed by HONAMPA, NZER1, LY 12 and LY 15 for plant height, cob length, number of kernels per row and number of rows per cob. Cob height, cob girth, leaf length, leaf girth and cob weight recorded high SCA effect in crosses; HON×AHO, HON×DZI, HON×NZE, DZI×LY15, NZE×LY12, AHO×LY15 and NZE×HON. Number of kernels per row, cob length and cob girth recorded high broad sense heritability. Performance ratio was high in cob length, cob weight, number of rows per cob and leaf length. Cob weight, leaf length, number of rows per cob and plant height revealed high degrees of dominance. Originality/value The combining ability and heritability estimates can be used to predict the performance of selected parents and breeding method for breeding of high yielding varieties.

Keywords: Additive, dominance, genotype, heritability, yield