Methods
Cowpea data from the University of California, Riverside
S9.COWPEA General Study. Data converted from original S9-COWPEA evaluations to 1989. This data represents various environments over several years which made up the S9-COWPEA data through 1989. For additional information, contact Graves Gillaspie at the Southern Regional Plant Introduction Station at (770) 412-4777.
1999 Cowpea increase in Experiment (field and greenhouse).
2000 Cowpea increase in Experiment (field and greenhouse).
2001 Cowpea increase in Experiment (field).
2002 Cowpea increase in Experiment (field).
2014 Cowpea regeneration at various locations
1995 Cowpea increase in Griffin.
1996 Cowpea increase in Griffin.
1997 Cowpea increase in Experiment.
1998 Cowpea increase in Experiment.
In order to evaluate variability of antioxidant activity (AOA) in cowpea, 697 cowpea accessions from the Core Collection were analyzed for AOA expressed as micrograms trolox equivalents/gdw. Two grams of dry seed from each accession were ground, extracted in methanol and analyzed for AOA using the free radical, 2,2-Diphenyl-1-picrylhydrazyl (DPPH), method. A large variation in AOA within the core collection was observed. A least significant difference of 131.5 (p =0.05) was obtained. Higher AOA was manifested by accessions with pigmented seed coats. Accessions that were speckled, striped or had a pigmented eye were moderate in AOA, while the cream types were generally low. Variability in AOA observed among cowpea accessions suggests that breeding for high AOA can be successfully conducted. Accessions with high AOA could also be used to extract antioxidants for industrial purposes.
Increase of Botswana accessions in greenhouse
1995 Botswana cowpea increase in Griffin.
1996 Botswana virus elimination cowpea increase in greenhouse in Griffin.
Accessions from the Cowpea Core Collection were evaluated for their relative degree of resistance/susceptibility to Iron Deficiency Chlorosis (FeDC). Ten seed were planted in 10 foot rows for each replication in a completely randomized block with 3 replications. A subjective rating system was used and a total of nine ratings were recorded for each accession. Based on the nine ratings an average score was determined, and each accession was assigned a rating from very susceptible to very resistant to chlorosis (dark green). The soil at Blackland Research Center near Temple, Texas is Houston Black Clay (pH 8.2).
2020 Evaluation of cowpea for drought tolerance at seedling stage. Ravelombola W, Shi A, Chen S, Xiong H, Yang Y, Cui Q, Olaoye D, Mou B. Evaluation of cowpea for drought tolerance at seedling stage. Euphytica. 2020 Aug;216(8):1-9.
2003 Cowpea increase in Experiment (field).
2004 Cowpea increase in Experiment (field).
2005 Cowpea increase in Experiment (field).
2006 Cowpea increase in Experiment (field).
2008 Cowpea increase in Experiment (field).
2009 Cowpea increase in Experiment (field)
2010 Cowpea regeneration in Experiment (field)
2011 Cowpea regeneration in Experiment (field)
1999 Cowpea greenhouse increase in Griffin.
1996 Greenhouse cowpea increase in Griffin.
1997 Cowpea greenhouse increase in Griffin.
1998 Cowpea greenhouse increase in Griffin.
2001 Greenhouse cowpea increase in Griffin.
2002 Greenhouse cowpea increase in Griffin.
2003 Winter Greenhouse cowpea increase in Griffin.
2004 Winter Greenhouse cowpea increase in Griffin.
2005 Winter Greenhouse cowpea increase in Griffin.
2006 Winter Greenhouse cowpea increase in Griffin
2007 Greenhouse cowpea increase in Griffin
2009 Winter Greenhouse cowpea increase in Griffin
2010 Greenhouse cowpea increase in Griffin
2011 Greenhouse cowpea increase in Griffin
2012 Greenhouse cowpea increase in Griffin
2012 Cowpea summer greenhouse regeneration in Griffin. Harvested in 2013
2013 Cowpea summer greenhouse regeneration in Griffin
2015 Cowpea Regeneration in Hydroponics
1999 Cowpea increase in Isabela, Puerto Rico.
2000 Cowpea increase in Isabela, Puerto Rico.
2001 Cowpea increase in Isabela, Puerto Rico
2002 Cowpea increase in Isabela, Puerto Rico
2003 Cowpea increase in Isabela, Puerto Rico
2004 Cowpea increase in Isabela, Puerto Rico and experiment in St. Croix
2005 Cowpea increase in Isabela, Puerto Rico
2006 Cowpea increase in Isabela, Puerto Rico
2007 Cowpea increase in Isabela, Puerto Rico
2008 Cowpea increase in Isabela, Puerto Rico
2009 Cowpea increase in Isabela, Puerto Rico
2010 Cowpea increase in Isabela, Puerto Rico
2011 Cowpea increase in Isabela, Puerto Rico
2012 Cowpea increase in Isabela, Puerto Rico
2013 Cowpea increase in Isabela, Puerto Rico
1996 Kenya virus elimination cowpea increase in greenhouse in Griffin.
2000 Cowpea molecular study in Griffin.
Accessions from the Cowpea Core Collection were evaluated for growth response to low phosphorus (P) soil conditions. The aspect of soil fertililty that most negatively affects crop production is phosphorus deficiency. The study was conducted in a glasshouse at the Texas AgriLife Research Station in Bushland, Texas. Soil used was a Betis sand which is similar to the seriously P deficient soils of the West African Sahel. The Betis sand had a pH of 4.7 in 1:1 water:soil mixture, and plant-available P level of 3 mg kg-1 using the Melich III method. No (0) phosphate treatment was added. After 8 weeks, plant height was measured and shoots were harvested, dried, and weighed. Total biomass (shoot dry weight + root dry weight) was calculated. Results were grouped into five categories from efficient to inefficient under low P conditions.
2005 Quarantine greenhouse regeneration and virus screening (requested by Dr. Henry Shands, NCGRP)
2006 Quarantine greenhouse regeneration and virus screening (requested by Dr. Henry Shands, NCGRP)
Accessions from the Cowpea Core Collection were evaluated for growth response to rock phosphate (RP) application. The aspect of soil fertililty that most negatively affects crop production is phosphorus deficiency. Naturally occurring rock phosphate is an alternative that is relatively inexpensive compared to chemical fertlizers. The study was conducted in a glasshouse at the Texas AgriLife Research Station in Bushland, Texas. Soil used was a Betis sand which is similar to the seriously P deficient soils of the West African Sahel. The Betis sand had a pH of 4.7 in 1:1 water:soil mixture, and plant-available P level of 3 mg kg-1 using the Melich III method. Phosphate treatment was added as 300 mg P kg-1 soil as RP from Niger, Tahoua. After 8 weeks, plant height was measured and shoots were harvested, dried, and weighed. Total biomass (shoot dry weight + root dry weight) was calculated. Results were grouped into five categories from highly responsive to least responsive to added RP.
2021 Evaluation of salt tolerance in cowpea at seedling stage. Ravelombola W, Dong L, Barickman TC, Xiong H, Olaoye D, Bhattarai G, Zia B, Alshaya H, Alatawi I, Shi A. Evaluation of salt tolerance in cowpea at seedling stage. Euphytica. 2021 Jun;217(6):1-20.
1998 Cowpea increase in Kingshill, VI.
2012 Cowpea field regeneration at Westbrook farm in Griffin
2015 Cowpea Regeneration at Westbrook
S9.MUNGBEAN General Study. Data converted from original S9-MUNGBEAN evaluations to 1989. This data represents various environments over several years which made up the S9-MUNGBEAN data through 1989. For additional information, contact Gil Lovell at the Southern Regional Plant Introduction Station at (404) 228-7255.
1995 mung bean increase in Griffin.
Mungbean genetic diversity study using DNA markers. Each accession grown in greenhouse for a study of descriptors and to collect leaf tissue for extraction.
2005 Mungbean greenhouse regeneration and observation
2015 Mungbean Regeneration at Westbrook
Other Vigna spp. hundred seed weights for available inventories updated semi-annually to incorporate new data on current regenerations
2001 Vigna observation and virus resistance study in Griffin.
2015 Vigna Regeneration at Westbrook
Vigna - 2017 at Experiment, GA (Replenishment order 289925)
Images of Vigna unguiculata (cowpea) flowers taken in 2009 at Isabela, Puerto Rico
Images of Vigna unguiculata (cowpea) flowers taken in 2010 at Isabela, Puerto Rico
Images of Vigna spp. flowers taken in 2002 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2003 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2004 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2005 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2006 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2007 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2008 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2009 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2010 at PGRCU, Griffin, GA
Images of Vigna spp. flowers taken in 2013 at PGRCU, Griffin, GA
Images of Vigna spp. leaves taken in 2002 at PGRCU, Griffin, GA
Images of Vigna spp. leaves taken in 2003 at PGRCU, Griffin, GA
Images of Vigna spp. leaves taken in 2005 at PGRCU, Griffin, GA
Images of Vigna spp. leaves taken in 2006 at PGRCU, Griffin, GA
Images of Vigna spp.plants taken in 2002 at PGRCU, Griffin, GA
Images of Vigna spp.plants taken in 2003 at PGRCU, Griffin, GA
Images of Vigna spp.plants taken in 2004 at PGRCU, Griffin, GA
Images of Vigna spp.pods taken in 2002 at PGRCU, Griffin, GA
Images of Vigna spp.pods taken in 2003 at PGRCU, Griffin, GA
Images of Vigna spp.pods taken in 2004 at PGRCU, Griffin, GA
Images of Vigna spp.pods taken in 2005 at PGRCU, Griffin, GA
Images of Vigna spp.pods taken in 2007 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2001 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2002 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2003 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2004 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2005 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2006 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2007 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2008 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2009 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2010 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2011 at PGRCU, Griffin, GA
Images of Vigna spp. seed scanned in 2012 at PGRCU. Griffin, GA
Image of Vigna spp. seed scanned in 2013 at PGRCU. Griffin, GA