QTL: Fine-grained phenotyping for phasic development in doubled haploid population of wheat (Triticum aestivum)
Material type:
TextPublication details: 2013Description: p. 140Summary: Developing time in wheat is of major importance in the context of climate change and crop adaptation, as the adjustment of the phasic development critically requires avoidance of extreme abiotic constraints. Suitable adjustment can elude cold damage during winter and high temperatures in summer. Despite of being controlled by genes sensitive to environmental cues like photoperiod (Ppd) and vernalization (Vrn), crop duration and its phases are also subject of an independent set of genes called `earliness per se'. Further understanding of the genetic control of these complex traits will allow a fine-tune development for particular environments, therefore a segregating doubled haploid (DH) population is used in order to obtain a high-throughput genotyping. An ear emergence quantitative trait loci (QTL) has been identified on chromosome 4A in a mapping DH population of Buster x Charger. These two cultivars differ in length of developmental phases. We expect to identify genetic markers that correlate with the observed difference, in days to ear emergence, sequencing the candidate locus. Future work will involve a fine mapping to improve the markers that control flowering time.
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Abstract only
Developing time in wheat is of major importance in the context of climate change and crop adaptation, as the adjustment of the phasic development critically requires avoidance of extreme abiotic constraints. Suitable adjustment can elude cold damage during winter and high temperatures in summer. Despite of being controlled by genes sensitive to environmental cues like photoperiod (Ppd) and vernalization (Vrn), crop duration and its phases are also subject of an independent set of genes called `earliness per se'. Further understanding of the genetic control of these complex traits will allow a fine-tune development for particular environments, therefore a segregating doubled haploid (DH) population is used in order to obtain a high-throughput genotyping. An ear emergence quantitative trait loci (QTL) has been identified on chromosome 4A in a mapping DH population of Buster x Charger. These two cultivars differ in length of developmental phases. We expect to identify genetic markers that correlate with the observed difference, in days to ear emergence, sequencing the candidate locus. Future work will involve a fine mapping to improve the markers that control flowering time.
Global Wheat Program
English
Lucia Segura
INT1511
CIMMYT Staff Publications Collection