62 research outputs found

    Assessing the Impact of Pumpkins Plantation, Harvest and Storage Decisions on a Collaborative Supply Chain with Data Analysis Tools

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    [EN] Successful pumpkins production requires the use of varieties that jointly with other factors yield well and produce pumpkins of the size, shape, color, and quality demanded by the market. But not only these issues are important. The perishable nature of pumpkins makes other issues such as how to prevent deterioration after harvest to become also relevant. In this paper the pumpkins plantation, harvest and storage (PHS) process is described and how some decisions affect certain goals, such as yield or conservation time. Additionally, some decision-making insights in a supply chain collaborative scenario made up of two stages: plantation/harvest and storage are given, where yield and conservation time trade-offs are outlined to develop win-win strategies. A real case using data analysis tools is analyzed. Results provide guidelines not only to make decisions independently on each stage but also to collaboratively work.The authors acknowledge the support of the project 691249, RUCAPS: "Enhancing and implementing knowledge based ICT solutions within high risk and uncertain conditions for agriculture production systems", funded by the European Union's research and innovation programme under the H2020 Marie Skodowska-Curie Actions.PĂ©rez Perales, D.; RodrĂ­guez-SĂĄnchez, MDLÁ.; Ortiz Bas, Á.; Guyon, C. (2020). Assessing the Impact of Pumpkins Plantation, Harvest and Storage Decisions on a Collaborative Supply Chain with Data Analysis Tools. IFIP Advances in Information and Communication Technology. 598:511-523. https://doi.org/10.1007/978-3-030-62412-5_42S511523598Prima, W.A., Xing, K., Amer, Y.: Collaboration and sustainable agri-food supply chain: a literature review. 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    Genetic relationships and evolution in Cucurbita pepo (pumpkin, squash, gourd) as revealed by simple sequence repeat polymorphisms

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    Genetic relationships among 104 accessions of Cucurbita pepo were assessed from polymorphisms in 134 SSR (microsatellite) and four SCAR loci, yielding a total of 418 alleles, distributed among all 20 linkage groups. Genetic distance values were calculated, a dendrogram constructed, and principal coordinate analyses conducted. The results showed 100 of the accessions as distributed among three clusters representing each of the recognized subspecies, pepo, texana, and fraterna. The remaining four accessions, all having very small, round, striped fruits, assumed central positions between the two cultivated subspecies, pepo and texana, suggesting that they are relicts of undescribed wild ancestors of the two domesticated subspecies. In both, subsp. texana and subsp. pepo, accessions belonging to the same cultivar-group (fruit shape) associated with one another. Within subsp. pepo, accessions grown for their seeds or that are generalists, used for both seed and fruit consumption, assumed central positions. Specialized accessions, grown exclusively for consumption of their young fruits, or their mature fruit flesh, or seed oil extraction, tended to assume outlying positions, and the different specializations radiated outward from the center in different directions. Accessions of the longest-fruited cultivar-group, Cocozelle, radiated bidirectionally, indicating independent selection events for long fruits in subsp. pepo probably driven by a common desire to consume the young fruits. Among the accessions tested, there was no evidence for crossing between subspecies after domestication

    Respostas fenológicas de cultivares brasileiras de trigo à vernalização e ao fotoperíodo

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    O objetivo deste trabalho foi avaliar o efeito de diferentes combinaçÔes de vernalização e fotoperĂ­odo no desenvolvimento de cinco cultivares brasileiras de trigo. O experimento foi realizado em Passo Fundo, RS, em trĂȘs Ă©pocas de semeadura: 23/6, 25/7 e 27/8 de 2003. O delineamento experimental foi o de blocos ao acaso com parcelas subsubdivididas e quatro repetiçÔes. Os tratamentos consistiram de: trĂȘs regimes fotoperiĂłdicos - fotoperĂ­odo natural (FN), fotoperĂ­odo estendido em quatro horas (FE 4) e fotoperĂ­odo estendido atĂ© completar vinte horas de luz (FE 20) - locados na parcela principal; dois regimes de vernalização - nĂŁo vernalizado (NV) e vernalizado com 30 dias (V) -, na subparcela; e cinco cultivares de trigo - BRS 179, BRS 194, BRS 207, BRS Figueira e BRS Umbu, avaliadas nas subsubparcelas. Houve interação entre fotoperĂ­odo e cultivar (semeadura em 23/6), e todas as cultivares tiveram o ciclo reduzido com o aumento do fotoperĂ­odo, enquanto nas plantas com Ă©pocas de semeadura 25/7 e 27/8, houve interação entre fotoperĂ­odo e cultivar e entre vernalização e cultivar. Essas variĂĄveis aceleraram o ciclo de desenvolvimento da cultura e interferiram na duração dos subperĂ­odos importantes para a formação dos componentes do rendimento de grĂŁos
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