Genetic analysis of crosses between hexaploid bread (Triticum aestivum L.) and tetraploid durum wheat (T. turgidum spp durum)

PhD Thesis


Padmanaban, Sriram. 2018. Genetic analysis of crosses between hexaploid bread (Triticum aestivum L.) and tetraploid durum wheat (T. turgidum spp durum). PhD Thesis Doctor of Philosophy. University of Southern Queensland. https://doi.org/10.26192/5c0dab7af69d1
Title

Genetic analysis of crosses between hexaploid bread
(Triticum aestivum L.) and tetraploid durum wheat
(T. turgidum spp durum)

TypePhD Thesis
Authors
AuthorPadmanaban, Sriram
SupervisorMartin, Anke
Sutherland, Mark W.
Knight, Noel L.
Institution of OriginUniversity of Southern Queensland
Qualification NameDoctor of Philosophy
Number of Pages103
Year2018
Digital Object Identifier (DOI)https://doi.org/10.26192/5c0dab7af69d1
Abstract

An ability to access and then transfer genes from bread wheat into durum wheat and viceversa is an excellent way to improve the genetic architecture of these two closely related but a different ploidy level wheat species. Bread wheat has number of desirable characters such as partial resistance to crown rot and head blight that can complement durum wheat. Durum wheat has a number of desirable traits such as seed weight, seed colour, and nematode tolerance that can complement bread wheat. Therefore, developing hexaploid/tetraploid crosses can be one of the useful breeding techniques to addresses bread and durum wheat improvement for yield, pest and disease resistance. Before screening for any traits that have been incorporated from bread and durum wheat into hexaploid/tetraploid derived lines, it is necessary to understand how these inter-ploidy crosses are different with regards to inheritance of the nuclear and cytoplasmic genomes. Thus the present study aimed to screen nuclear and cytoplasmic genome inheritance of different hexaploid/tetraploid wheat crosses.

To determine the proportion of nuclear genome inheritance from either parent of the hexaploid/tetraploid derived wheat lines, high-density polymorphic DArT markers and cytological genomic and fluorescence in situ hybridisation were employed. To investigate the cytoplasmic mitochondrial inheritance, targeted cytochrome maturation genes ccmfn, ccmfc and nad3 genes of bread and durum wheat were sequenced using Sanger sequencing. Different exaploid/tetraploid crosses were established following different breeding techniques, i.e., reciprocal crosses, crosses involving different hexaploid and tetraploid cultivars, crosses made at different time points; and crosses involving a bread wheat cultivar with an introgressed 2G segment. Retention of D-genome chromosomes, proportion of chromosome A and B genome alleles inherited, and how introgressed 2G segment of bread wheat cultivars inherits when combined with tetraploid durum wheat were discussed in different respective research chapters. This thesis also has an additional chapter summarising the maternal inheritance of cytoplasmic DNA in polyploidy crosses. Overall this study has illustrated how hexaploid/tetraploid wheat crosses can be used in the commercial plant breeding programs for bread and durum wheat improvement.

Keywordsbread wheat, DArT markers, durum wheat, in situ hybridisation, inter-ploidy crosses, wheat breeding
ANZSRC Field of Research 2020310506. Gene mapping
310803. Plant cell and molecular biology
Byline AffiliationsCentre for Crop Health
Permalink -

https://research.usq.edu.au/item/q4x32/genetic-analysis-of-crosses-between-hexaploid-bread-triticum-aestivum-l-and-tetraploid-durum-wheat-t-turgidum-spp-durum

Download files


Published Version
Padmanaban_2018_whole.pdf
File access level: Anyone

  • 491
    total views
  • 153
    total downloads
  • 2
    views this month
  • 1
    downloads this month

Export as

Related outputs

Association between presence of Triticum timopheevii introgression and D-genome retention in hexaploid/tetraploid wheat crosses
Padmanaban, Sriram, Zhang, Peng, Sutherland, Mark W. and Martin, Anke. 2018. "Association between presence of Triticum timopheevii introgression and D-genome retention in hexaploid/tetraploid wheat crosses." Molecular Breeding: new strategies in plant improvement. 38 (7), pp. 1-8. https://doi.org/10.1007/s11032-018-0838-6
A cytological and molecular analysis of D-genome chromosome retention following F2–F6 generations of hexaploidxtetraploid wheat crosses
Padmanaban, Sriram, Zhang, Peng, Sutherland, Mark W., Knight, Noel L. and Martin, Anke. 2018. "A cytological and molecular analysis of D-genome chromosome retention following F2–F6 generations of hexaploidxtetraploid wheat crosses." Crop and Pasture Science. 69 (2), pp. 121-130. https://doi.org/10.1071/CP17240
Pentaploid wheat hybrids: applications, characterisation, and challenges
Padmanaban, Sriram, Zhang, Peng, Hare, Ray, Sutherland, Mark and Martin, Anke. 2017. "Pentaploid wheat hybrids: applications, characterisation, and challenges." Frontiers in Plant Science. 8. https://doi.org/10.3389/fpls.2017.00358
Genome inheritance in populations derived from hexaploid/ tetraploid and tetraploid/hexaploid wheat crosses
Padmanaban, Sriram, Sutherland, Mark W., Knight, Noel L. and Martin, Anke. 2017. "Genome inheritance in populations derived from hexaploid/ tetraploid and tetraploid/hexaploid wheat crosses." Molecular Breeding: new strategies in plant improvement. 37 (4), pp. 37-48. https://doi.org/10.1007/s11032-017-0647-3