Requirements for Success in Marker-Assisted Breeding for Drought-Prone Environments

Passioura, J.B. and Spielmeyer, W. and Bonnett, D.G. (2007) Requirements for Success in Marker-Assisted Breeding for Drought-Prone Environments. In: Advances in Molecular Breeding Toward Drought and Salt Tolerant Crops. Springer, Netherlands, pp. 479-500. ISBN Online 978-1-4020-5578-2

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The challenge that commercial breeders have in improving the yield of crops in drought-prone environments is to produce cultivars that capture more of the water supply for use in transpiration; exchange transpired water for CO2 more effectively in producing biomass; and convert more of the biomass into grain. Many traits affect these requirements, and assume greater or lesser importance depending on the severity and timing of a drought. Although hundreds of QTLs have been found that are associated with improved yield during drought, few have been converted into markers useful to breeders owing to the difficulty of understanding the phenotype in realistic environments. The few markers that are in use target disease resistance and morphological or ecophysiological traits known to affect the water economy of a crop. Faster progress in developing markers useful to breeders will come with the evidently increasing interaction between breeding programs and marker laboratories

Item Type: Book Section
Uncontrolled Keywords: Marker assisted breeding, breeders markers, water limited environments, transpiration efficiency, harvest index
Author Affiliation: CSIRO Plant Industry, ACT 2601, GPO Box 1600,Canberra, Australia
Subjects: Crop Improvement > Genetics/Genomics
Depositing User: Mr Siva Shankar
Date Deposited: 15 Jul 2013 02:59
Last Modified: 15 Jul 2013 03:02
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