Selection of high-performance black-eyed cowpea (Vigna unguiculata) through GYT biplot analysis: a new methodology based on multiple characteristics.

Cowpea bean is a common crop quite appreciated in Brazil. However, it is known that its low yield depending on soil and climatic conditions. The aim of this research is the selection of high-performance black-eyed cowpea through GYT biplot analysis. Twelve (12) cowpea bean strains were assessed between 2016 and. The study followed a randomized complete block design, with four repetitions; two commercial cultivars were used ascheck. The following variables were assessed: number of days required for flowering, final stand, value for cultivation, pod yield, pod length, mean number of grains per pod and grain weight. The analysis of variance showed genetic variability between strains, differences between the assessed years and different strain-performance in each growing year. Based on the GYT biplot graph, cultivar BRS Itaim, and strains L9 and L7 recorded the best performance for the set of yield characteristics. Variable ?pod length? had positive correlation to bedding, number of days required for flowering and number of grains per pod. Variable ?100-grain weight? had positive correlation to final stand, pod yield and mean grain weight per pod. Strains L9, L7 and cultivar BRS Itaim recorded the best yield regarding the assessed variables

Administration of M. leprae Hsp65 Interferes with the Murine Lupus Progression

The heat shock protein [Hsp] family guides several steps during protein synthesis, are abundant in prokaryotic and eukaryotic cells, and are highly conserved during evolution. The Hsp60 family is involved in assembly and transport of proteins, and is expressed at very high levels during autoimmunity or autoinflammatory phenomena. Here, the pathophysiological role of the wild type [WT] and the point mutated K409A recombinant Hsp65 of M. leprae in an animal model of Systemic Lupus Erythematosus [SLE] was evaluated in vivo using the genetically homogeneous [NZBxNZW]F1 mice. Anti-DNA and anti-Hsp65 antibodies responsiveness was individually measured during the animal's life span, and the mean survival time [MST] was determined. The treatment with WT abbreviates the MST in 46%, when compared to non-treated mice [p<0.001]. An increase in the IgG2a/IgG1 anti-DNA antibodies ratio was also observed in animals injected with the WT Hsp65. Incubation of BALB/c macrophages with F1 serum from WT treated mice resulted in acute cell necrosis; treatment of these cells with serum from K409A treated mice did not cause any toxic effect. Moreover, the involvement of WT correlates with age and is dose-dependent. Our data suggest that Hsp65 may be a central molecule intervening in the progression of the SLE, and that the point mutated K409A recombinant immunogenic molecule, that counteracts the deleterious effect of WT, may act mitigating and delaying the development of SLE in treated mice. This study gives new insights into the general biological role of Hsp and the significant impact of environmental factors during the pathogenesis of this autoimmune process

GYT biplot analysis: a new approach for cowpea line selection.

Cowpea beans is grown under different edaphoclimatic conditions throughout Brazilian regions causing them to perform differently due to the influence that environments have on genotypes. Thus, it is necessary to obtain lines adapted to the specific cultivation environments so that it can present high yield. The objective of this work was to select cowpea lines through the GYT biplot multivariate analysis

GYT biplot analysis: a new approach for cowpea line selection.

Cowpea beans is grown under different edaphoclimatic conditions throughout Brazilian regions causing them to perform differently due to the influence that environments have on genotypes. Thus, it is necessary to obtain lines adapted to the specific cultivation environments so that it can present high yield. The objective of this work was to select cowpea lines through the GYT biplot multivariate analysis.Made available in DSpace on 2019-11-20T00:41:27Z (GMT). No. of bitstreams: 1 Oliveiraetal2019.pdf: 349566 bytes, checksum: fb3c01a7109a965108effdd226c1ce3a (MD5) Previous issue date: 2019bitstream/item/205015/1/Oliveira-et-al-2019.pd

Ganho de seleção no melhoramento genético de feijão-caupi.

Foram avaliadas 14 linhagens de feijão-caupi, nas safras de 2015 e 2016, no município de Bom Jesus de Itabapoana, localizado no Noroeste do Estado do Rio de Janeiro (Latitude 21o08'02"S, longitude 41o40'47"W e altitude 88m), temperatura média anual de 23oC e solo classificado como latossolo vermelho-amarelo + cambissolo, segundo a classificação climática revista de Köppen-Geiger (Alvares, 2013). O delineamento experimental utilizado foi o de blocos casualizados com quatro repetições, sendo a parcela experimental constituída por quatro linhas de 5m, com espaçamento entre fileiras de 0,20m x 0,50m, tendo como área útil as duas fileiras centrais. O desbaste foi realizado 15 dias após o plantio, deixando apenas uma planta por cova. As características avaliadas foram: peso de vagens por planta (PVP): determinada pelo peso total em gramas (g) de vagens por planta, peso de grãos por vagem (PGV): peso total em gramas (g) de sementes/vagem; peso de 100 grãos (W100S): pesagem de 100 sementes, de uma amostra escolhida aleatoriamente; e produtividade de grãos (PG): quantificação do peso total em gramas (g) dos grãos de cada planta após a debulha de vagens. Estas avaliações foram obtidas com o auxílio de balança de precisão