Stylosanthes scabra: genetic variability of forage quality traits

Main Article Content

Fabiana Karla de Araújo Américo
https://orcid.org/0000-0003-1917-9867
Marcelo Ayres Carvalho
https://orcid.org/0000-0003-2792-2980
Juaci Vitória Malaquias
https://orcid.org/0000-0001-6720-9624
Allan Kardec Braga Ramos
https://orcid.org/0000-0003-1622-6226
Gustavo José Braga
https://orcid.org/0000-0002-5765-1184
Claudio Takao Karia
https://orcid.org/0000-0002-0503-0239
Carlos Eduardo Lazarini da Fonseca
https://orcid.org/0000-0001-8482-0839

Abstract

Stylosanthes scabra Vogel is a tropical legume grown in dry tropical and subtropical environments. The objective of this research was to evaluate the genetic diversity of forage quality traits for 80 accessions of S. scabra. Seven plants from each accession were planted in a single-line plot with no replicates at Embrapa Cerrados, Brazil. All plants were harvested 90 days after planting. Crude protein (CP), in vitro dry matter digestibility (IVDMD), neutral detergent fibre (NDF), acid detergent fibre (ADF), lignin (LIG), hemicellulose (HEMIC) and cellulose (CELLU) were estimated. Data were submitted to principal component analysis (PCA) and a cluster analysis was performed to identify groups of similarity. Simpson and Shannon–Weaver diversity indices estimated the genetic diversity. The average values of CP, IVDMD, NDF, ADF, LIG, HEMIC and CELLU were 220g/kg, 560g/kg, 516.8g/kg, 368g/kg, 69.4g/kg, 148.8g/kg and 298.6g/kg, respectively. There was a significant difference among collection sites for IVDMD, ADF and CELLU. The first two principal components accounted for 73% of the total variation. The 80 accessions resulted in four clusters, among which significant differences were observed for CP, IVDMD and ADF. Group IV, with 24 accessions, had the highest CP and IVDMD concentrations and the lowest ADF concentration, being the highest-quality forage group. Diversity indices were 0.78 and 0.81 for Simpson’s and Shannon–Weaver’s, respectively. In conclusion, there is genetic diversity for forage quality traits among S. scabra.

Article Details

How to Cite
de Araújo Américo, F. K., Ayres Carvalho, M., Vitória Malaquias, J., Braga Ramos, A. K., José Braga, G., Takao Karia, C. and Lazarini da Fonseca, C. E. (2022) “Stylosanthes scabra: genetic variability of forage quality traits”, Genetic Resources, 3(5), pp. 24-35. doi: 10.46265/genresj.UPPQ3994.
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References

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