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Open AccessArticle

Root Trait Variability in Coffea canephora Genotypes and Its Relation to Plant Height and Crop Yield

1
Department of Agronomy, Federal University of Espírito Santo, Alegre 29500-000, Espírito Santo, Brazil
2
Soil Science Department, University of São Paulo, Piracicaba 13418-900, São Paulo, Brazil
3
Forest Research Center, Instituto Superior de Agronomia, Universidade de Lisboa, 2784-505 Lisbon, Portugal
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Unidade de Geobiociências, Geoengenharias e Geotecnologias (GeoBioTec), Faculdade de Ciências Tecnologia, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
5
Agricultural and Biological Science Department, Federal University of Espírito Santo, São Mateus 29932-540, Espírito Santo, Brazil
*
Author to whom correspondence should be addressed.
Agronomy 2020, 10(9), 1394; https://doi.org/10.3390/agronomy10091394
Received: 19 July 2020 / Revised: 3 September 2020 / Accepted: 8 September 2020 / Published: 15 September 2020
(This article belongs to the Section Crop Breeding and Genetics)
Coffee breeding based on root traits is important to identify productive genotypes under adverse environmental conditions. This study assessed the diversity of root traits in Coffea canephora and its correlation with plant height and crop yield. Undisturbed soil samples were collected down to 60 cm from 43 coffee genotypes, in which one of them was propagated by seed and all others by stem cutting. The roots were washed, scanned, and processed to quantify root length density, root volume, root superficial area, and root diameter. Additionally, plant height and crop yield were also assessed. Root length density ranged from 40 to 1411 mm cm−3, root volume from 6 to 443 mm3 cm−3, root superficial area from 61 to 1880 mm2 cm−3, and root diameter from 0.6 to 1.1 mm. Roots were concentrated in the topsoil (0–20 cm) for most genotypes. In deeper depths (30–60 cm), root length density, root volume, and root superficial area were higher in genotypes 14, 25, 31, and 32. Positive correlations were found between root traits and both plant height and crop yield. The results of this work may contribute to the overall cultivation of C. canephora, specially for crop breeding in adverse environmental conditions. View Full-Text
Keywords: Conilon coffee; robusta coffee; crop breeding; root morphology; root diversity; root architecture Conilon coffee; robusta coffee; crop breeding; root morphology; root diversity; root architecture
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MDPI and ACS Style

Silva, L.O.E.; Schmidt, R.; Valani, G.P.; Ferreira, A.; Ribeiro-Barros, A.I.; Partelli, F.L. Root Trait Variability in Coffea canephora Genotypes and Its Relation to Plant Height and Crop Yield. Agronomy 2020, 10, 1394.

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