IICAR   25568
INSTITUTO DE INVESTIGACIONES EN CIENCIAS AGRARIAS DE ROSARIO
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Phenotypical characters associated with the loss of the seed and the production of biomass in Panicum coloratum var. makarikariense.
Autor/es:
GUILLERMO R. PRATTA; MORESCO LIRUSSO, MARÍA FLORENCIA; FELITTI, S.A.; SACIDO, MÓNICA BENITA
Lugar:
Kentucky (Virtual)
Reunión:
Congreso; XXIV International Grassland Congress / XI International Rangeland Congress; 2021
Institución organizadora:
University of Kentucky
Resumen:
Since the beginning of humanity, plants have been manipulated by humans by artificial selection to obtain changes in their characteristics. This progress has been achieved through the domestication of the species. Panicum coloratum is a species of summer perennial grass, megathermic, tolerates waterlogging, cold and slightly saline soils. It is of African origin and used as fodder in various parts of the world. In Argentina around 130.500 hectares are sown, the most widespread varieties are: var. coloratum, and var. makarikariense Goossens. Its characteristics of determined flowering and ununiform ripening within the panicle, added to a very low retention of the seeds after maturation, establish serious difficulties in harvesting quality seeds. Megathermic forage species are good producers in forage quantity and, in turn, possess good quality. The objective of the work was to study the dynamics of seed dehiscence and the forage production of two cultivars of Panicum coloratum var. makarikariense (cv. Kapivera and cv. Bambatsi). The seed fall was evaluated weekly for 70 days between March-May 2017 and 2019 on 15 random inflorescences of each cultivar. Once the seed harvest was completed in May 2017 and 2019, the panicles were cut and the panicle height, panicle length, rachis length, wet weight, dry weight and percentage of dry matter were analyzed. Through a χ² distribution, it was found that there is experimental evidence that indicates that the dynamics of seed fall are different among cultivars. An analysis of main components was carried out in each year under study to simultaneously evaluate all the variables related to biomass, in the two ACPs mentioned there was not a defined grouping of the plants according to the cultivation to which they correspond.