Plant Molecular Biology

, Volume 56, Issue 4, pp 503–516

Cassava breeding: opportunities and challenges

  • Hernán Ceballos
  • Carlos A. Iglesias
  • Juan C. Pérez
  • Alfred G.O. Dixon
Article

DOI: 10.1007/s11103-004-5010-5

Cite this article as:
Ceballos, H., Iglesias, C.A., Pérez, J.C. et al. Plant Mol Biol (2004) 56: 503. doi:10.1007/s11103-004-5010-5

Abstract

Although cassava is a major food crop, its scientific breeding began only recently compared with other crops. Significant progress has been achieved, particularly in Asia where cassava is used mainly for industrial processes and no major biotic constraints affect its productivity. Cassava breeding faces several limitations that need to be addressed. The heterozygous nature of the crop and parental lines used to generate new segregating progenies makes it difficult to identify parents with good breeding values. Breeding so far has been mainly based on a mass phenotypic recurrent selection. There is very little knowledge on the inheritance of traits of agronomic relevance. Several approaches have been taken to overcome the constraints in the current methodologies for the genetic improvement of cassava. Evaluations at early stages of selection allow for estimates of general combining ability effect or breeding values of parental lines. Inbreeding by sequential self-pollination facilitates the identification of useful recessive traits, either already present in the Manihot gene pool or induced by mutagenesis.

Keywords

combining ability diallel crosses doubled haploids recurrent selection 

Abbreviations

AEZ

agro-ecological zone

AYT

advanced yield trial

CBSD

cassava brown streak dise-ase

CET

clonal evaluation trial

CG

cyanogenic glucosides

CMD

cassava mosaic disease

DH

doubled-haploids

DMC

dry matter content

FRY

fresh root yield

GCA

general combining ability

HI

harvest index

IITA

International Institute of Tropical Agriculture

LAC

Latin America and the Caribbean

PPD

post-harvest physiological deterioration

PT

plant type or architecture

PYT

preliminary yield trial

RT

regional trials

SCA

specific I combining ability

SED

rating for superelongation disease

SI

selection index

Copyright information

© Kluwer Academic Publishers 2004

Authors and Affiliations

  • Hernán Ceballos
    • 1
  • Carlos A. Iglesias
    • 1
    • 3
  • Juan C. Pérez
    • 1
  • Alfred G.O. Dixon
    • 2
  1. 1.Centro Internacional de Agricultura Tropical (CIAT)Colombia
  2. 2.International Institute of Tropical Agriculture (IITA)CaliColombia
  3. 3.Weaver Popcorn CompanyIndianaUSA

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