Evaluation of fitness in F2 generations of Africa Biofortified Sorghum event 188 and weedy Sorghum bicolor ssp. drummondii

Magomere, T. and Obukosia, S. and Albertsenc, M. and Wambugu, F. and etl, . (2016) Evaluation of fitness in F2 generations of Africa Biofortified Sorghum event 188 and weedy Sorghum bicolor ssp. drummondii. Electronic Journal of Biotechnology, 22. pp. 52-61.

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Abstract

Background: Introgression of transgenes from crops to their wild species may enhance the adaptive advantage and therefore the invasiveness of and weedy forms. The study evaluated the effect of Africa Biofortified Sorghum (ABS) genes from ABS event 188 on the vegetative and reproductive features of the F2 populations derived from crosses with Sorghum bicolor subsp. drummondii. Results: F1 populationswere obtained fromreciprocal crosses involving ABS event 188 and its null segregantwith inbredweedy parents from S. bicolor subsp. drummondii. Four F2 populations and four parental populationswere raised in RCBDwith 4 replications in a confined field plot for two seasons. Vegetative and reproductive traitswere evaluated. The vigour shown in the F2 populations from the reciprocal crosses involving ABS event 188 and S. bicolor subsp. drummondii was similar to that in the crosses involving the null segregant and S. bicolor subsp. drummondii. Differences in vegetative and reproductive parameters were observed between the parental controls and the F2 populations. Examination of the above and below ground vegetative biomass showed lack of novel weedy related features like rhizomes. Conclusions: Therefore, release of cropswith ABS 188 transgenes into cropping systems is not likely to pose a risk of conferring additional adaptive advantage in the introgressing populations. The interaction of ABS genes in weedy backgrounds will also not have an effect towards enhancing the weedy features in these populations.

Item Type: Article
Uncontrolled Keywords: Beta-carotene, Heterosis, Transgenics, Phospho-mannose isomarese
Author Affiliation: Africa Harvest Biotechnology Foundation International, P.O. Box 642, 00621-Village Market, Nairobi, Kenya
Subjects: Crop Improvement
Divisions: Sorghum
Depositing User: Mr T L Gautham
Date Deposited: 28 Oct 2016 06:34
Last Modified: 28 Oct 2016 06:34
URI: http://eprints.icrisat.ac.in/id/eprint/14460

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