marker-assisted selection in wheat

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Chapter 6Targeted introgression of cottonfibre quality quantitative trait lociusing molecular markersJean-Marc Lacape, Trung-Bieu Nguyen, Bernad Hau and Marc Giband
68Marker-assisted selection – Current status and future perspectives in crops, livestock, forestry and fishSummaryWithin the framework of a cotton breeding programme, molecular markers are used toimprove the efficiency of the introgression of fibre quality traits of Gossypium barbadenseinto G. hirsutum. A saturated genetic map was developed based on genotyping dataobtained from the BC 1 (75 plants) and BC 2 (200 plants) generations. Phenotypic measurementsconducted over three generations (BC 1 , BC 2 and BC 2 S 1 ) allowed 80 quantitative traitloci (QTL) to be detected for fibre length, uniformity, strength, elongation, fineness andcolour. Positive QTL, i.e. those for which favourable alleles came from the G. barbadenseparent, were harboured by 19 QTL-rich regions on 15 “carrier” chromosomes. In subsequentgenerations (BC 3 and BC 4 ), markers framing the QTL-rich regions were used toselect about 10 percent of over 400 plants analysed in each generation. Although BC plantsselected through the marker-assisted selection (MAS) process show promising fibre quality,only their full field evaluation will allow validation of the procedure.
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MARKER-ASSISTED SELECTIONCurrent st
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iiiContentsAcknowledgementsForeword
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Section v - marker-assisted selecti
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viiithe specific gene or chromosome
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CIATCIMMYTCIPCIRADcMCMDCMVCORPOICAC
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xiiISNARISSRITPGRFAJGIKARILDLDLLD-M
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xvContributorsAmalia BaroneProfesso
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xviiElcio Perpétuo GuimarãesSenio
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xixAndrea SonninoSenior Agricultura
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Chapter 1Marker-assisted selection
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Chapter 1 - An overview of the issu
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118Marker-assisted selection - Curr
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Chapter 10Strategies, limitations a
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Chapter 10 - Strategies, limitation
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Section VMarker-assisted selectioni
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Chapter 19Technical, economic and p
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This book provides a comprehensive
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marker-assisted selection in wheat

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