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Towards molecular breeding of reproductive traits in cereal crops

Author: Dwivedi, S.
Author: Perotti, E.
Author: Ortiz, R.
Year: 2008
URI: http://hdl.handle.net/10883/1746
Abstract: The transition from vegetative to reproductive phase, flowering per se, floral organ development, panicle structure and morphology, meiosis, pollination and fertilization, cytoplasmic male sterility (CMS) and fertility restoration, and grain development are the main reproductive traits. Unlocking their genetic insights will enable plant breeders to manipulate these traits in cereal germplasm enhancement. Multiple genes or quantitative trait loci (QTLs) affecting flowering (phase transition, photoperiod and vernalization, flowering per se), panicle morphology and grain development have been cloned, and gene expression research has provided new information about the nature of complex genetic networks involved in the expression of these traits. Molecular biology is also facilitating the identification of diverse CMS sources in hybrid breeding. Few Rf (fertility restorer) genes have been cloned in maize, rice and sorghum. DNA markers are now used to assess the genetic purity of hybrids and their parental lines, and to pyramid Rf or tms (thermosensitive male sterility) genes in rice. Transgene(s) can be used to create de novo CMS trait in cereals. The understanding of reproductive biology facilitated by functional genomics will allow a better manipulation of genes by crop breeders and their potential use across species through genetic transformation.
Format: PDF
Language: English
Publisher: Wiley Open Access
Publisher: Association of Applied Biologists
Publisher: Society for Experimental Biology
Publisher: Blackwell Publishing
Type: Article
Region: Global
Pages: 529-559
Issue: 6
Volume: 6
DOI: 10.1111/j.1467-7652.2008.00343.x
Keywords: Inflorescence Architecture
Keywords: MADS-Box
Agrovoc: FLOWERING
Agrovoc: GENE EXPRESSION
Agrovoc: QUANTITATIVE TRAIT LOCI
Agrovoc: CLONING
Agrovoc: MEIOSIS
Agrovoc: TRANSGENIC PLANTS
Journal: Plant Biotechnology Journal


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  • Genetic Resources
    Genetic Resources including germplasm collections, wild relatives, genotyping, genomics, and IP

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