Analysis of genetic purity of forage legume Stylosanthes capitata Vog. aiming its use in an experiment in TROP-T-FACE system (Temperature Free-air Controlled Enhancement and Free-air Carbon Dioxide Enrichment)
The Stylosanthes capitata Vogel species stands out for its economic importance, adaptation to drought, acid sandy soils with low phosphate levels, high levels of resistance to anthracnose and adaptation to extensive grazing systems. S. capitata is a species of the family of legumes variable in many morphological characteristics, including size and shape of the inflorescence, growth habit, hairiness of the stems and leaves and color of the stems. Because of its great importance for the Brazilian livestock, this species was included in climate change simulation studies (Elevation of CO2 and global warming) under TROP-T-FACE system (Temperature Free-Air Controlled Enhancement and Free-air Carbon Dioxide Enrichment) in the USP/Ribeirão Preto. However the production and marketing of seeds of S. capitata species is allied to the production of seed of Stylosantes macrocephala species, since both make up the farming Estilosantes Campo Grande (ECG) developed by Embrapa Beef Cattle, there so the probability of contamination of seed lots, and the biggest problem in the field is its morphological similarity. In this context, this research proposal will be used molecular markers ISSR (Inter-Simple Sequence Repeat polymorphic DNA) and SSR (Simple Sequence Repeat polymorphic DNA), in order to: 1) assess the genetic diversity of a population of individuals of the species S. capitata planted in field under TROP-T-FACE system, and 2) assess the genetic purity of these plants compared the species S. macrocephala. These results ensure the identification of the genetic purity of the plants of S. capitata to control possible contamination in experimental field.
News published in Agência FAPESP Newsletter about the scholarship: