Abstract
Traits related to root architecture are of great importance for yield performance of crop species, although they remain poorly understood. The present study is aimed at identifying the genomic regions involved in the control of root morphological traits in durum wheat (Triticum durum Desf.). A set of 123 recombinant inbred lines derived from the durum wheat cross of cvs. ‘Creso’ × ‘Pedroso’ were grown hydroponically to two growth stages, and were phenotypically evaluated for a number of root traits. In addition, meta-(M)QTL analysis was performed that considered the results of other root traits studies in wheat, to compare with the ‘Creso’ × ‘Pedroso’ cross and to increase the QTL detection power. Eight quantitative trait loci (QTL) for traits related to root morphology were identified on chromosomes 1A, 1B, 2A, 3A, 6A and 6B in the ‘Creso’ × ‘Pedroso’ segregating population. Twenty-two MQTL that comprised from two to six individual QTL that had widely varying confidence intervals were found on 14 chromosomes. The data from the present study provide a detailed analysis of the genetic basis of morphological root traits in wheat. This study of the ‘Creso’ × ‘Pedroso’ durum-wheat population has revealed some QTL that had not been previously identified.
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Acknowledgments
This study was supported by the Ministry of Education, Universities and Research (MIUR), with the special grants AGROGEN and ISCOCEM. We are grateful to V. Giovanniello for her technical support in assessment of phenotypic data. We are grateful to Dr. Christopher Berrie for scientific English language editorial assistance.
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Communicated by S. Hohmann.
M. Petrarulo and D. Marone contributed equally to this study.
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Petrarulo, M., Marone, D., Ferragonio, P. et al. Genetic analysis of root morphological traits in wheat. Mol Genet Genomics 290, 785–806 (2015). https://doi.org/10.1007/s00438-014-0957-7
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DOI: https://doi.org/10.1007/s00438-014-0957-7