Uniformidade de sementes de genótipos de feijão-caupi cultivados em dois ambientes no Estado de Roraima

The objective of this study was to evaluated the uniformity of seeds from 19 cowpea genotypes in two environment of Roraima State. The seeds utilized were produced in the experimental fi elds of Serra da Prata (CESP) and Monte Cristo (CEMC), belonging to Embrapa Roraima. Samples of 400 g of cowpea seeds were separated and weighed and classifi ed by fi v e sieves with round and oblong holes of different dimensions, being weighed separately. Seeds retained in each sieve were weighed separately. Seeds withheld in 4.5 x 22 mm sieve were assessed according to mass of a thousand seeds and germination. Results showed that 89.5 % of seeds produced in CEMC are bigger than 4.5 x 22 mm and in CESP 90.0%. Concerning to average mass of a thousand seeds, no differences were verifi ed between the two environments, while materials ranged from 127.5 to 219.6 g. Seeds of CESP showed physiological quality superior than CEMC.