Avaliação de Genótipos de Milho em Roraima: Safra 2011/2012.

bitstream/item/162088/1/N-41-BOL-192-corrigido.pd

Correlation between mass and vigor of Pochota fendleri (Malvaceae) seeds stored in different environments.

Made available in DSpace on 2018-08-25T00:31:52Z (GMT). No. of bitstreams: 1 RCA17221.pdf: 757383 bytes, checksum: d7ae0d27a2b5d34b990564e218a7eebd (MD5) Previous issue date: 2018-08-24bitstream/item/181908/1/RCA17221.pd

Densidade de plantio em cultivares de feijão-caupi de porte semiprostado.

O objetivo do presente estudo foi avaliar a resposta de cultivares de feijão-caupi de porte semiprostrado a diferentes densidades de plantio no cerrado de Roraima. O ensaio foi realizado no Campo Experimental Água Boa da Embrapa Roraima, no município de Boa Vista. O delineamento experimental utilizado foi o blocos ao acaso, em esquema fatorial com 4 cultivares (BRS Aracê, BRS Juruá, BRS Pajeu e BRS Xiquexique) e 5 densidades de plantio (60 mil, 100 mil, 140 mil, 180 mil e 220 mil plantas por hectare). Cada parcela útil foi composta por duas fileiras de 5,0 m de comprimento cada uma e espaçadas entre si de 0,80 m. A característica produtividade de grãos secos foi avaliada, sendo os dados submetidos à análise de variância. Não foi possível definir densidades de plantio para as cultivares avaliadas. BRS Aracê, BRS Pajeu e BRS Xiquexique foram as que apresentaram as maiores produtividades.CONAC 2012. Disponível em: http://www.conac2012.org/resumos/pdf/022c.pdf. Acesso em: 24 jun. 2013

Adaptabilidade e Estabilidade Produtiva de Genótipos de Arroz Irrigado em Roraima.

bitstream/item/162091/1/N-43-BOL-194-corrigido.pd

Repeatability of fruits and seeds production and selection of Brazil nut genotypes in native populations in Roraima.

This study estimates the repeatability coefficients of two production traits in two native populations of Brazil nut trees. It determines the number of years of suitable evaluations for an efficient selection process, determines the permanent phenotypic correlation between production traits and also the selection of promising trees in these populations. Populations, located in the Itã region (ITA) and in the in the Cujubim region (CUJ), are both belonging to the municipality of Caracaraí, state of Roraima - Brazil, and consist of 85 and 51 adult trees, respectively. Each tree was evaluated regarding the number of fruits per plant (NFP) and fresh seed weight per plant (SWP), for eight (ITA) and five consecutive years (CUJ). Statistical analyses were performed according to the mixed model methodology, using Software Selegen-REML/BLUP (RESENDE, 2007). The repeatability coefficients were low for NFP (0.3145 and 0.3269 for ITA and CUJ, respectively) and also for SWP (0.2957 and 0.3436 for ITA and CUJ, respectively). It on average takes nine evaluation years to reach coefficients of determination higher than 80%. Permanent phenotypic correlation values higher than 0.95 were obtained for NFP and SWP in both populations. Although trees with a high number of fruits and seed weight were identified, more evaluation years are needed to perform the selection process more efficiently

Adaptabilidade e Estabilidade Produtiva de Genótipos de Arroz de Terras Altas em Roraima.

bitstream/item/162090/1/N-42-BOL-193-corrigido.pd