Genome inheritance in populations derived from hexaploid/tetraploid and tetraploid/hexaploid wheat crosses

• Published in: Molecular breeding Vol. 37; no. 4; pp. 1 - 9
• Main Authors: Padmanaban, Sriram, Sutherland, Mark W., Knight, Noel L., Martin, Anke
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.04.2017; Springer Nature B.V
• Subjects: Biomedical and Life Sciences; Biotechnology; Bread; Chromosomes; durum wheat; Genetic crosses; genome; Genomes; Genomics; Heredity; hexaploidy; Hybrids; inheritance (genetics); Life Sciences; Molecular biology; Plant biology; Plant Genetics and Genomics; Plant Pathology; Plant Physiology; Plant resistance; Plant Sciences; Populations; Progeny; reciprocal crosses; Retention; tetraploidy; Triticum aestivum; Triticum turgidum subsp. durum; Wheat; DArTseq; Interploidy crosses; Hexaploid/tetraploid (or) tetraploid/hexaploid; Pentaploid hybrids; Retention of D chromosomes
• DOI: 10.1007/s11032-017-0647-3
• ISSN: 1380-3743

Hexaploid/tetraploid and tetraploid/hexaploid wheat hybrids were established using the hexaploid ( Triticum aestivum L.) bread wheat LRC2010-150 and the tetraploid durum wheat ( T. turgidum spp. durum ) WID802. Thirty F 2 progeny from each cross were characterised using Diversity Arrays Technology (DArTseq™) markers to determine whether there are differences between the crosses in the proportion of A, B and D genomic material inherited from each parent. Inheritance of the A and B genome from the tetraploid durum parent varied from 32 to 63% among the 60 lines assessed, and results indicated significant differences between the two F 2 populations in the mean overall proportion of chromosomes A and B inherited from each parent. Significant differences were also observed between the crosses in the proportion of chromosomal segments on 2B, 3A, 3B and 4A inherited from the tetraploid parent. The F 2 populations also showed significant differences in the average retention of D chromosomes per line with the tetraploid/hexaploid cross retaining a mean of 2.83 chromosomes while the reciprocal cross retained a mean of 1.8 chromosomes per line. A strong negative correlation was observed in individual lines from both populations between the proportion of the A and B genome inherited from the tetraploid durum parent and the retention of the D genome. The implication of these results for the design of efficient crossing strategies between hexaploid and tetraploid wheats is discussed.