Abstract
The objective of this work was to evaluate the genetic variability of Cenchrus ciliaris accessions using morpho-agronomic descriptors for the identification of germplasm with phenotypic divergence that can be used as male parents in breeding programmes for the species. Thirty-eight accessions were characterised using six quantitative and 12 qualitative descriptors. The descriptors that most contributed to the divergence were inflorescence length (22.48%), leaf blade width (19.52%) and leaf blade length (18.35%). Based on the mean grouping test, for the character basal tillering intensity, the accessions were distributed into three groups, of which accessions CPATSA79125 and CPATSA79150 had the most tillers. Thus, there was genetic diversity among the evaluated accessions, with an emphasis on the CPATSA79123 and CPATSA90611 genotypes, as they were the most divergent accessions and thus can be used in clonal selections and in the prospection of genes of agronomic interest. The different accessions can be selected for the most varied objectives of the improvement programmes for the species.
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Acknowledgements
The authors would like to thank the National Council for Scientific and Technological Development (CNPq), the Coordination for the Improvement of Higher Education Personnel (CAPES), the Pernambuco Science and Technology Support Foundation (FACEPE), and Embrapa Tropical Semi-Arid for their support, scholarship and grants received through project numbers: PQ-306505/2022-3, BFP-0087.5.01/22, and CAPES 001.
Funding
The authors would like to thank the National Council for Scientific and Technological Development (CNPq) through project number PQ-306505/2022-3 and Embrapa Tropical Semi-Arid (Project 22.16.04.018.00.04.010) for the financial support. We also acknowledge the Coordination for the Improvement of Higher Education Personnel (CAPES) for the doctoral scholarship Finance Code 001.
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ICNSR, RPA and NFM conceived and planned the study and wrote the manuscript. RPA provided the germplasm accessions, which were multiplied by ICNSR for the experiment. ICNSR and RPA carried out the phenotyping. and ICNSR, NFM and TLN analysed the data. All authors read and approved the final manuscript.
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dos Santos Ribeiro, I.C.N., do Nascimento, T.L., Antônio, R.P. et al. Estimation of genetic diversity in Cenchrus ciliaris accessions introduced in the Brazilian semi-arid region. Genet Resour Crop Evol 71, 1883–1892 (2024). https://doi.org/10.1007/s10722-023-01746-x
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DOI: https://doi.org/10.1007/s10722-023-01746-x