Loss of Certified Maize (<i>Zea mays</i>L.) and Cowpea (<i>Vigna unguiculata</i>(L.) Walp.) Seed Viability during Storage in a Sub-Saharan Region: Analysis of Environmental Factors  

作　　者：Willy Kaja Ngombo Adrien Kalonji-Mbuyi Roger Kizungu Mvumilia Kabwe Nkongolo Willy Kaja Ngombo;Adrien Kalonji-Mbuyi;Roger Kizungu Mvumilia;Kabwe Nkongolo(National Seed Services (SENASEM), Kinshasa, RD-Congo;Regional Nuclear Energy Center, Kinshasa (CRENK), RD-Congo;Faculty of Agronomy, University of Kinshasa, Kinshasa 11, RD-Congo;National Institute for Research and Agronomic Studies (INERA), Kinshasa 1, RD-Congo;Department of Biological Sciences, Laurentian University, Sudbury, Ontario, Canada)

机构地区：[1]National Seed Services (SENASEM), Kinshasa, RD-Congo [2]Regional Nuclear Energy Center, Kinshasa (CRENK), RD-Congo [3]Faculty of Agronomy, University of Kinshasa, Kinshasa 11, RD-Congo [4]National Institute for Research and Agronomic Studies (INERA), Kinshasa 1, RD-Congo [5]Department of Biological Sciences, Laurentian University, Sudbury, Ontario, Canada

出　　处：《American Journal of Plant Sciences》2021年第9期1410-1424,共15页美国植物学期刊（英文）

摘　　要：The objective of this study was to characterize environment factors involved in loss of seed viability during storage in open granaries. The temperature and relative humidity of the granary as well as the equilibrium moisture content of seeds were determined monthly. Their effects on the loss of viability of maize (<i>Zea mays</i> L.) and cowpea (<i>Vigna unguiculata</i> (L.) Walp.) seeds were examined. The results showed that relative humidity levels > 65% associated with temperatures > 25°C (conditions in the open granary) do not guarantee safe storage of maize lots for a period of 9 to 12 months. Based on these data and the results of seed viability analysis, local environmental conditions in Gandajika (DR-Congo) and seed genetic background are the main factors for the rapid deterioration of seeds during storage. The germination rate correlated negatively with storage duration (<span style="font-family:;" "="">-0.94) and temperature (-0.57) while it correlates positively with the relative humidity (0.58) for both lots of maize analyzed. The same trend was observed with the two-cowpea varieties studied (IT82D-889 and Diamant). Similar work using more varieties in other granaries is required to validate key factors involved in seed viability during storage in targeted regions.</span>The objective of this study was to characterize environment factors involved in loss of seed viability during storage in open granaries. The temperature and relative humidity of the granary as well as the equilibrium moisture content of seeds were determined monthly. Their effects on the loss of viability of maize (<i>Zea mays</i> L.) and cowpea (<i>Vigna unguiculata</i> (L.) Walp.) seeds were examined. The results showed that relative humidity levels > 65% associated with temperatures > 25°C (conditions in the open granary) do not guarantee safe storage of maize lots for a period of 9 to 12 months. Based on these data and the results of seed viability analysis, local environmental conditions in Gandajika (DR-Congo) and seed genetic background are the main factors for the rapid deterioration of seeds during storage. The germination rate correlated negatively with storage duration (<span style="font-family:;" "="">-0.94) and temperature (-0.57) while it correlates positively with the relative humidity (0.58) for both lots of maize analyzed. The same trend was observed with the two-cowpea varieties studied (IT82D-889 and Diamant). Similar work using more varieties in other granaries is required to validate key factors involved in seed viability during storage in targeted regions.</span>

关 键 词：Seed Viability STORAGE Maize (Zea mays L.) Cowpea (Vigna unguiculata): DR-Congo Modeling Approach 

分 类 号：S51[农业科学—作物学]