Agronomic and molecular characterization of <i>Chloris gayana</i> cultivars and salinity response during germination and early vegetative growth

Authors

  • Andrea N. Ribotta Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina.
  • Eliana López Colomba Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina. Facultad de Ciencias Agropecuarias, Universidad Católica de Córdoba, Córdoba, Argentina.
  • Graciela P. Bollati Facultad de Ciencias Agropecuarias, Universidad Católica de Córdoba, Córdoba, Argentina.
  • Gustavo G. Striker Instituto de Investigaciones Fisiológicas y Ecológicas vinculadas a la Agricultura (IFEVA), Buenos Aires, Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.
  • Edgardo J. Carloni Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina.
  • Sabrina M. Griffa Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina.
  • Mariana P. Quiroga Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina.
  • Exequiel A. Tommasino Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina.
  • Karina A. Grunberg Instituto de Fisiología y Recursos Genéticos Vegetales, Centro de Investigaciones Agropecuarias, Instituto Nacional de Tecnología Agropecuaria (IFRGV-CIAP-INTA), Córdoba, Córdoba, Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Buenos Aires, Argentina.

DOI:

https://doi.org/10.17138/tgft(7)14-24

Abstract

Chloris gayana is a warm-season grass, often cultivated in areas where soil salinity is a major constraint for forage production. Five cultivars (2 unselected populations and 3 synthetic varieties) were evaluated through agronomic traits as well as Inter Simple Sequence Repeats (ISSRs) and Sequence-related Amplified Polymorphism (SRAP) molecular markers. The consensus between both agronomic and molecular data sets was high (>99%) suggesting that both systems provided similar estimates of genetic relationships. The analysis revealed that synthetic varieties, Finecut, Topcut and Santana, were the most genetically different cultivars, whereas the unselected populations, Pioneer and Katambora, were closely related. Responses to salinity stress during germination and early vegetative growth stages were evaluated in only the synthetic varieties. The results showed that Finecut and Santana were able to germinate in the same proportion as controls even at concentrations of 200 mM NaCl. Under hydroponic conditions, Santana attained approximately 20% higher total dry weight than the other 2 varieties and the longest roots. Finecut presented the highest root dry weight. These results suggested that Santana and Finecut showed high salinity tolerance at germination and early vegetative growth stages, both crucial phases when seeking a successful pasture establishment, particularly in saline environments. Further studies in the field are needed to determine if these hydroponic results are reproduced under field conditions.

How to Cite

Ribotta, A. N., López Colomba, E., Bollati, G. P., Striker, G. G., Carloni, E. J., Griffa, S. M., Quiroga, M. P., Tommasino, E. A., & Grunberg, K. A. (2019). Agronomic and molecular characterization of <i>Chloris gayana</i> cultivars and salinity response during germination and early vegetative growth. Tropical Grasslands-Forrajes Tropicales, 7(1), 14–24. https://doi.org/10.17138/tgft(7)14-24

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Published

2019-01-31

Issue

Section

Research Papers