Melhoramento de forrageiras tropicais.

Melhoramento convencional de forrageiras. Seleção genômica no melhoramento de forrageiras

Brachiaria decumbens intraspecific hybrids: characterization and selection for seed production.

Brachiaria decumbens has great importance in the national beef cattle scenario due to its high forage yield potential and high adaptability to acid soils and low fertility. In order to obtain new cultivars, intraspecific hybrids, previously selected by the Brachiaria breeding program, were evaluated in 2013 and 2014 for phenological characteristics and seed production potential through their production components, aiming to obtain cultivars with satisfactory production agronomic characteristics and forage yield, resistant to ?cigarrinhas-das-pastagens? (Tomaspia sp.) and good seed production. Estimates of phenotypic correlation and analysis of variance were performed using the SAS 9.3 software. From the results obtained in both consecutive years, it was observed that there was a correlation between the reproductive tiller number (RT) and the pure seeds (PS) weight in the seedbeds of the second year of production around 70% (p < 0.01), which can be considered as a parameter to estimate the production of pure seeds before the start of flowering.Título em português: Híbridos intraespecíficos de Brachiaria decumbens: caracterização e seleção para produção de sementes

Selection of Panicum maximum hybrids in Brazil.

In search of new cultivars with differentials that better meet the needs of the cattle ranchers, crosses between five sexual plants and the apomictic accessions PM20, PM21 and Myiage were carried out at Embrapa Beef Cattle, Campo Grande, MS, Brazil. Accessions PM20 and PM21 were used to generate shorter hybrids for use under grazing and for crop-livestock integration; Myiage was used because of its ability to retain seeds.bitstream/item/210922/1/Selection-of-Panicum-maximum-hybrids-in-Brazil.pd