SAFS405Exploring the Diversity of Tropical Pumpkin in Costa Rica LG copy
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Transcript of SAFS405Exploring the Diversity of Tropical Pumpkin in Costa Rica LG copy
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Exploring the Diversity of Tropical Pumpkin in Costa Rica
Lizzie GillSustainable Agriculture and Food Systems
and International Affairs
IROPInternational Research Opportunities Program
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Background
• Commercial agriculture• Vulnerable to change BIODIVERSITY = RESISTANCE
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Tropical Pumpkin (Squash)• Cucurbita (squash, pumpkin, gourd)
– Cucurbita moschata (Butternut Squash)– Ayote sazón (seasoned squash) or calabaza
• Dr. Brent Loy• Economic importance• High carotenoid and vitamin A content
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Costa Rica
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Question
What is the level of phenotypic and genotypic diversity of Cucurbita moschata in Costa Rica?
Map diversity of winter squash/ayote sazón and record/inventory important characteristics
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The Process
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The Process
• Ferias (farmers market)
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The Process
Alajuela
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Fabio Baudrit Moreno Agriculture Experiment Station
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Phenotypic Assessment(Appearance)
• Brix sweetness• Dry matter texture• Color nutrition status• Weight yield
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Accession / muestra Fecha evaluación:Country / país Costa Rica City / Ciudad Fecha de compra:Location / lugar FRUIT / COSECHA Fruit shape / forma de la fruta Fresh weight / peso de la fruta (g) Fruit length / largo de la fruta (cm) Neck diameter / diámetro de cuello (cm) Neck circumference / circunferencia de cuello (cm) Bulb diameter / diámetro de bulbo (cm) Bulb circumfrence / circunferencia de bulbo (cm) Skin strength / dureza de la cáscara x4 (Kg) Skin texture / textura de la cáscara Skin color / color de la cáscara Secondary skin color / color de la cáscara secundario
Design of secondary skin color / diseño del color secundario de la fruta Rib form / forma de costilla Rind thickness / grosor de cáscara (mm) Flesh thickness / grosor de la pulpa (mm) Seed cavity diameter / diámetro de la cavidad (cm) % dry matter / % material seca x4 º Brix x3 Flesh color / color de la pulpa Flesh strength / dureza de la pulpa x4 SEED / SEMILLA Total count / numero de semillas total (¼ x4) Separation ease / facilidad de la seperacion Weight of 100 / peso de 100 (g) Coat texture / superficie de la semilla Coat luster / lustre de la superficie Coat color / color de la superficie Length / largo (mm) x5 Width / ancho (mm) x5 Thickness / grueso (mm) x5
Phenotypic Assessment
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Genotypic Assessment(Make-up)
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Observations and Outcomes
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Alajuela Cartago Guanacaste Heredia Puntarenas San Jose0
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Trait variation based on location
Brix% Dry matterColorMass (kg)
Location
Varia
ble
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Alajuela Cartago Guanacaste Heredia Puntarenas San Jose0
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BB B
AB
B
A
Dry matter variation based on location
Location
% d
ry m
atter
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Observations and Outcomes
• Leela F1• Arjuna F1
Presence of hybrid varieties
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Take Away
• Diversity present– Positive:
1. Use for breeding and improved varieties
2. Preserve biodiversity– Negative:
1. Yield inconsistency and possible explanation for increase hybrid varieties
Walter Barrantes
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The Experience
‘Gringa de ayote’
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Thank You• Andrew Ogden• Patricia Jarema• Brent Loy• Walter Barrantes• La familia Camacho• Georgeann Murphy • Peter Akerman• Hamel Center• Donors
– Mr. Hamel– Mr. & Mrs. Noonan– Mr. Carlton W. Allen
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Questions NOITQ SEU S ?