Modernization in plant breeding approaches for improvingbiotic stress resistance in crop plants

  • Hussain B
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1. Introduction About 5000–10,000 years ago, domestication of crop plants resulted in conversion of plants from wild to cultivated forms. As humans selected fruits and crop plants on the basis of sweeter fruits or prolific seed production, so these random selections led to genetic erosion of many crop species. Most crops grown worldwide are the direct result of selection in that era. It is thought that more than 900 cultivated plant species were lost during the domestication process as these crops were not preferred by the people of those times (Hammer and Khoshbakht, 2005). For example, quinoa (Chenopodium quinoa) and maca (Lepidium meyenii Walp.) were not domesticated in those times, but their recent domestication has found them very useful crops for their nutrition and medicinal benefits, respectively (wan de Wouwet al., 2009). The green revolution led to the development of new cereal types that had dwarfism and fertilizer responsiveness as their most prominent traits. However, genes conferring

Author-supplied keywords

  • backcross
  • bc
  • ems
  • ethyl methyl sulfonate
  • gene pyramiding
  • in genome
  • list of abbreviations
  • marker assisted selection
  • mas
  • methyl methyl sulfonate
  • micro rna
  • mirna
  • mms
  • near isogenic lines
  • nils
  • qtls
  • quantitative trait loci
  • reactive oxygen species
  • rna interference
  • rnai
  • ros
  • sar
  • short
  • silencing
  • sirna
  • systemic acquired resistance
  • targeted induced local lesions
  • tilling
  • transgenic
  • vigs
  • virus induced gene

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  • Babar Hussain

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