Additive relationships and parent-offspring regression in Musa germplasm with intergeneration genome size polymorphism

Abstract

Parent-offspring regression has often been used for the estimation of breeding value and narrow-sense heritability in experimental populations. particularly for diploid species with regular disomic inheritance. With polysomic inheritance, estimates of heritability based on parent-offspring regression are expected to be systematically biased, particularly when intra- and inter-generation ploidy polymorphisms occur as a result of unusual megasporogenesis. Measuring the discrepancy between true and estimated heritability has important theoretical and practical implications for the genetic improvement of plantain and bananas. In this regard, formulas were developed to describe the relationships between parental and filial generations with different ploidy states and this information was used to estimate heritability for several traits of plantains and bananas. This approach may be extended to other polysomic species with similar meiotic behaviour and ploidy polymorphism. (c) 2012 Elsevier B.V. All rights reserved.

Keywords

2n gametes; Additive relationships; Heritability; Hybrids; Musa breeding; Ploidy polymorphism; Polysomic inheritance

Published in

Scientia Horticulturae
2012, volume: 136, pages: 69-74
Publisher: ELSEVIER SCIENCE BV

SLU Authors

• Ortiz Rios, Rodomiro Octavio

  • Department of Plant Breeding, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Agricultural Science

Publication identifier

• DOI: https://doi.org/10.1016/j.scienta.2011.12.030

Permanent link to this page (URI)

https://res.slu.se/id/publ/45729