Adaptive values of wild × cultivated sorghum (Sorghum bicolor (L.) Moench) hybrids in generations F1, F2, and F3 uri icon

abstract

  • Gene flow between cultivated and their wild relatives is one of the main ecological concerns associated with the introduction genetically modified (GM) cultivars. GM sorghum cultivar has been developed and its commercial production may be possible in the near future. The rate of gene flow depends on the fitness of wild x cultivated sorghum hybrids. The study aimed at estimating adaptive values of wild x cultivated sorghum hybrids in generations F-1, F-2, and F-3 compared to their parents. Artificial crosses of four wild sorghums, five cultivated sorghums, and two male sterile lines were made to produce the F-1 generation, which were advanced to F-2 and F-3. Each hybrid generation and their respective parents were evaluated for their adaptive value at two sites in a randomised complete block design with seven replicates. The resulting progenies did not show serious fitness penalties. Some hybrids were as fit as their respective wild parents and no consistent differences exist between the three generations studied. Thus, the resultant wild x cultivated hybrids may act as avenue for introgression.
  • Gene flow between cultivated and theirwild relatives is one of the main ecological concernsassociated with the introduction genetically modified(GM) cultivars. GM sorghum cultivar has beendeveloped and its commercial production may bepossible in the near future. The rate of gene flowdepends on the fitness of wild 9 cultivated sorghumhybrids. The study aimed at estimating adaptivevalues of wild 9 cultivated sorghum hybrids ingenerations F1, F2, and F3 compared to their parents.Artificial crosses of four wild sorghums, five cultivatedsorghums, and two male sterile lines were madeto produce the F1 generation, which were advanced toF2 and F3. Each hybrid generation and their respectiveparents were evaluated for their adaptive value at two sites in a randomised complete block design withseven replicates. The resulting progenies did notshow serious fitness penalties. Some hybrids were asfit as their respective wild parents and no consistentdifferences exist between the three generations studied.Thus, the resultant wild 9 cultivated hybridsmay act as avenue for introgression

publication date

  • 2012
  • 2012
  • 2012