02719naa a2200469 a 450000100080000000500110000800800410001902200140006010000200007424501100009426000090020452011970021365000190141065000150142965000120144465000180145665000230147465000100149765000260150765000110153365000250154465000200156965000140158965000250160365000120162865000220164065300450166265300460170765300450175365300460179865300440184465300490188865300500193765300440198765300430203170000200207470000300209470000250212470000220214970000190217177300590219021176702019-12-26       2019    bl uuuu     u00u1 u    #d  a2317-15451 aSOUZA, J. T. A.  aYield and quality of seeds of lettuce genotypes produced under organic management.h[electronic resource]  c2019  aLettuce is one of the main vegetable species used in organic production. However, studies and research in the organic area are scarce. This study aimed to evaluate the yield and quality of seeds of lettuce genotypes produced in two consecutive years under an organic management system. Two plantations were installed under open field conditions corresponding to autumn/winter in 2016 and 2017. Ten lettuce genotypes were evaluated in four replications using a biofertilizer made from swine manure in the management and manual harvesting of seeds. Evaluations consisted of seed yield (in kg.ha−1), physical test (1000-seed weight), and germination and vigor test (first germination count, germination rate index, and seedling dry matter). The genotype Cubana and two Grand Rapids had higher yields under the tested conditions. Higher seed weights were recorded in 2017. Both genotypes Grand Rapids reached the minimum germination standard established for commercialization (80%). Vanda and AC 5058 showed a better performance for germination rate index and first germination count, while Cinderela had a better seedling dry matter. These varieties were promising for organic cultivation.  aBiofertilizers  aGene banks  aLettuce  aOrganic foods  aOrganic production  aSeeds  aAgricultura Orgânica  aAlface  aBanco de Germoplasma  aBiofertilizante  aGenótipo  aProdução Orgânica  aSemente  aTeste de Sementes  aAC 5053 (genótipo de alface da Embrapa)  aAC 5056 (genótipos de alface da Embrapa)  aAC 5058 (genótipo de alface da Embrapa)  aCinderela (genótipo comercial de alface)  aCubana (genótipo de alface da Embrapa)  aGrand Rapids (genótipo comercial de alface)  aGrand Rapids (genótipo de alface da Embrapa)  aMônica (genótipo comercial de alface)  aVanda (genótipo de alface da Embrapa)1 aCOSTA, C. A. da1 aBRANDÃO JUNIOR, D. da S.1 aMENEZES, J. B. de C.1 aNASCIMENTO, W. M.1 aCARDOSO, W. J.  tJournal of Seed Sciencegv.41, n. 3, p. 352-358, 2019.