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Christian Andreasen - One of the best experts on this subject based on the ideXlab platform.

  • Cañahua (Chenopodium pallidicaule): A Promising New Crop for Arid Areas
    Environment & Policy, 2020
    Co-Authors: J P Rodriguez, Christian Andreasen, Sven-erik Jacobsen, Marten Sorensen
    Abstract:

    The genus Chenopodium L. is a large group of plants of the amaranth, quinoa and spinach family (the Amaranthaceae), contributing significantly as providers of food. Another species belonging to this family is the neglected and underutilized Andean grain species canahua (Chenopodium pallidicaule Aellen). The grains are small and characterized by a low content of saponins and a high content of proteins with essential amino acid and high content of omega-6 fatty acid and essential minerals. The flour is a good alternative to wheat for people with coeliac problems.

  • seed shattering of canahua Chenopodium pallidicaule aellen
    Journal of Agronomy and Crop Science, 2017
    Co-Authors: J P Rodriguez, M Coarite, Bo Ørting, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule Aellen) is a semi‐domesticated relative of quinoa (Chenopodium quinoa Willd.) with high nutritious quality. It is tolerant to frost, drought, saline soils and pests. One seed yield limitation is seed loss during the maturity stages. Two greenhouse experiments in Denmark and field experiments in Bolivia were carried out to determine seed shattering in landraces and cultivars with different growth habits. 15–21 % of the seed shattering in the fields took place whilst the plants still were flowering and 25–35 % during physiological maturity. Seed shattering varied between locations on the Bolivian Altiplano. Canahua types with the semi‐prostrate growth (‘lasta’) had the highest seed shattering rate in the greenhouse experiments. The Umacutama landrace had lower seed shattering (1 %) than the cultivar Kullaca (7.2 %) both of the ‘lasta’ type. Under field conditions, the cultivar Illimani with the erect growth (‘saihua’) had the highest seed shattering rate (6.4–33.7 %) at both locations and at four different sowing dates. The Umacutama had the lowest rate (0.5–1.5 %). There were no significant differences between plants of the ‘lasta’ and the ‘saihua’ types. The landrace had significantly less seed loss than the cultivars. However, in the greenhouse, the landrace yield was approximately 25 % lower than the yields of the cultivars. In general, canahua cultivars had higher yield compared to landraces, but also a higher seed shattering rate. Landraces may be used in breeding programmes to develop high‐yielding cultivars with reduced seed shattering.

  • germination responses of canahua Chenopodium pallidicaule aellen to temperature and sowing depth a crop growing under extreme conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P < 0.001). Seeds germinated at the lowest temperature (3 °C). The estimated base temperature was close to 0 °C. A polynomial function described well the relation between time to 50% germination (t50) and temperature in the interval from 3 to 24 °C resulting in a linear relationship between germination rate and temperature. Shallow sowing depth (5–25 mm) resulted in 80% germination at 15 °C. There were significant differences of emergence in relationship to burial depth (P < 0.001). Only few seedlings emerged when seeds were sown at 50 mm depth. We did not find significant differences in emergence of seedlings between Lasta and Saihua at 15 °C. Nevertheless, at 5 °C, seedlings of canahua belonging to the Lasta growth habit form did have higher germination rate as were shown for the Kullaca cultivar and the Umacutama landrace. This may be attributed to larger seed size of these cultivars.

  • Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P 

J P Rodriguez - One of the best experts on this subject based on the ideXlab platform.

  • Cañahua (Chenopodium pallidicaule): A Promising New Crop for Arid Areas
    Environment & Policy, 2020
    Co-Authors: J P Rodriguez, Christian Andreasen, Sven-erik Jacobsen, Marten Sorensen
    Abstract:

    The genus Chenopodium L. is a large group of plants of the amaranth, quinoa and spinach family (the Amaranthaceae), contributing significantly as providers of food. Another species belonging to this family is the neglected and underutilized Andean grain species canahua (Chenopodium pallidicaule Aellen). The grains are small and characterized by a low content of saponins and a high content of proteins with essential amino acid and high content of omega-6 fatty acid and essential minerals. The flour is a good alternative to wheat for people with coeliac problems.

  • seed shattering of canahua Chenopodium pallidicaule aellen
    Journal of Agronomy and Crop Science, 2017
    Co-Authors: J P Rodriguez, M Coarite, Bo Ørting, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule Aellen) is a semi‐domesticated relative of quinoa (Chenopodium quinoa Willd.) with high nutritious quality. It is tolerant to frost, drought, saline soils and pests. One seed yield limitation is seed loss during the maturity stages. Two greenhouse experiments in Denmark and field experiments in Bolivia were carried out to determine seed shattering in landraces and cultivars with different growth habits. 15–21 % of the seed shattering in the fields took place whilst the plants still were flowering and 25–35 % during physiological maturity. Seed shattering varied between locations on the Bolivian Altiplano. Canahua types with the semi‐prostrate growth (‘lasta’) had the highest seed shattering rate in the greenhouse experiments. The Umacutama landrace had lower seed shattering (1 %) than the cultivar Kullaca (7.2 %) both of the ‘lasta’ type. Under field conditions, the cultivar Illimani with the erect growth (‘saihua’) had the highest seed shattering rate (6.4–33.7 %) at both locations and at four different sowing dates. The Umacutama had the lowest rate (0.5–1.5 %). There were no significant differences between plants of the ‘lasta’ and the ‘saihua’ types. The landrace had significantly less seed loss than the cultivars. However, in the greenhouse, the landrace yield was approximately 25 % lower than the yields of the cultivars. In general, canahua cultivars had higher yield compared to landraces, but also a higher seed shattering rate. Landraces may be used in breeding programmes to develop high‐yielding cultivars with reduced seed shattering.

  • germination responses of canahua Chenopodium pallidicaule aellen to temperature and sowing depth a crop growing under extreme conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P < 0.001). Seeds germinated at the lowest temperature (3 °C). The estimated base temperature was close to 0 °C. A polynomial function described well the relation between time to 50% germination (t50) and temperature in the interval from 3 to 24 °C resulting in a linear relationship between germination rate and temperature. Shallow sowing depth (5–25 mm) resulted in 80% germination at 15 °C. There were significant differences of emergence in relationship to burial depth (P < 0.001). Only few seedlings emerged when seeds were sown at 50 mm depth. We did not find significant differences in emergence of seedlings between Lasta and Saihua at 15 °C. Nevertheless, at 5 °C, seedlings of canahua belonging to the Lasta growth habit form did have higher germination rate as were shown for the Kullaca cultivar and the Umacutama landrace. This may be attributed to larger seed size of these cultivars.

  • Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P 

S E Jacobsen - One of the best experts on this subject based on the ideXlab platform.

  • seed shattering of canahua Chenopodium pallidicaule aellen
    Journal of Agronomy and Crop Science, 2017
    Co-Authors: J P Rodriguez, M Coarite, Bo Ørting, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule Aellen) is a semi‐domesticated relative of quinoa (Chenopodium quinoa Willd.) with high nutritious quality. It is tolerant to frost, drought, saline soils and pests. One seed yield limitation is seed loss during the maturity stages. Two greenhouse experiments in Denmark and field experiments in Bolivia were carried out to determine seed shattering in landraces and cultivars with different growth habits. 15–21 % of the seed shattering in the fields took place whilst the plants still were flowering and 25–35 % during physiological maturity. Seed shattering varied between locations on the Bolivian Altiplano. Canahua types with the semi‐prostrate growth (‘lasta’) had the highest seed shattering rate in the greenhouse experiments. The Umacutama landrace had lower seed shattering (1 %) than the cultivar Kullaca (7.2 %) both of the ‘lasta’ type. Under field conditions, the cultivar Illimani with the erect growth (‘saihua’) had the highest seed shattering rate (6.4–33.7 %) at both locations and at four different sowing dates. The Umacutama had the lowest rate (0.5–1.5 %). There were no significant differences between plants of the ‘lasta’ and the ‘saihua’ types. The landrace had significantly less seed loss than the cultivars. However, in the greenhouse, the landrace yield was approximately 25 % lower than the yields of the cultivars. In general, canahua cultivars had higher yield compared to landraces, but also a higher seed shattering rate. Landraces may be used in breeding programmes to develop high‐yielding cultivars with reduced seed shattering.

  • germination responses of canahua Chenopodium pallidicaule aellen to temperature and sowing depth a crop growing under extreme conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P < 0.001). Seeds germinated at the lowest temperature (3 °C). The estimated base temperature was close to 0 °C. A polynomial function described well the relation between time to 50% germination (t50) and temperature in the interval from 3 to 24 °C resulting in a linear relationship between germination rate and temperature. Shallow sowing depth (5–25 mm) resulted in 80% germination at 15 °C. There were significant differences of emergence in relationship to burial depth (P < 0.001). Only few seedlings emerged when seeds were sown at 50 mm depth. We did not find significant differences in emergence of seedlings between Lasta and Saihua at 15 °C. Nevertheless, at 5 °C, seedlings of canahua belonging to the Lasta growth habit form did have higher germination rate as were shown for the Kullaca cultivar and the Umacutama landrace. This may be attributed to larger seed size of these cultivars.

  • Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P 

Bartolo Estrella, Dolly Elisa - One of the best experts on this subject based on the ideXlab platform.

  • Influencia de la temperatura de tostado sobre el contenido de compuestos fenólicos totales y la capacidad antioxidante de la Cañihua (Chenopodium pallidicaule Aellen) variedad Cupi
    'Universidad Peruana Union', 2014
    Co-Authors: Bartolo Estrella, Dolly Elisa
    Abstract:

    El objetivo de esta investigación fue determinar la influencia de la temperatura de tostado de los granos de cañihua (Chenopodium pallidicaule Aellen) variedad Cupi sobre el contenido de fenoles totales y su actividad antioxidante. Se utilizó un diseño Box Behnken, las variables independientes en el estudio fueron la temperatura de tostado (120, 160 y 200 °C), el acondicionamiento de la cañihua (cáscara, grano entero, grano sin cáscara) y el tipo de molienda (fina, intermedia, sin molienda). Se almacenaron muestras testigo sin tratamiento para la evaluación de estos efectos. Los resultados de análisis de variancia mostraron que la temperatura de tostado y la molienda del cereal influyen significativamente en el contenido de fenoles totales (p

  • Influencia de la temperatura de tostado sobre el contenido de compuestos fenólicos totales y la capacidad antioxidante de la Cañihua (Chenopodium pallidicaule Aellen) variedad Cupi
    'Universidad Peruana Union', 2014
    Co-Authors: Bartolo Estrella, Dolly Elisa
    Abstract:

    Procesamiento, seguridad y gestión en la Industria alimentariaEscuela Profesional de Ingeniería y ArquitecturaTesisLIMAEl objetivo de esta investigación fue determinar la influencia de la temperatura de tostado de los granos de cañihua (Chenopodium pallidicaule Aellen) variedad Cupi sobre el contenido de fenoles totales y su actividad antioxidante. Se utilizó un diseño Box Behnken, las variables independientes en el estudio fueron la temperatura de tostado (120, 160 y 200 °C), el acondicionamiento de la cañihua (cáscara, grano entero, grano sin cáscara) y el tipo de molienda (fina, intermedia, sin molienda). Se almacenaron muestras testigo sin tratamiento para la evaluación de estos efectos. Los resultados de análisis de variancia mostraron que la temperatura de tostado y la molienda del cereal influyen significativamente en el contenido de fenoles totales (p

Marten Sorensen - One of the best experts on this subject based on the ideXlab platform.

  • Cañahua (Chenopodium pallidicaule): A Promising New Crop for Arid Areas
    Environment & Policy, 2020
    Co-Authors: J P Rodriguez, Christian Andreasen, Sven-erik Jacobsen, Marten Sorensen
    Abstract:

    The genus Chenopodium L. is a large group of plants of the amaranth, quinoa and spinach family (the Amaranthaceae), contributing significantly as providers of food. Another species belonging to this family is the neglected and underutilized Andean grain species canahua (Chenopodium pallidicaule Aellen). The grains are small and characterized by a low content of saponins and a high content of proteins with essential amino acid and high content of omega-6 fatty acid and essential minerals. The flour is a good alternative to wheat for people with coeliac problems.

  • seed shattering of canahua Chenopodium pallidicaule aellen
    Journal of Agronomy and Crop Science, 2017
    Co-Authors: J P Rodriguez, M Coarite, Bo Ørting, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule Aellen) is a semi‐domesticated relative of quinoa (Chenopodium quinoa Willd.) with high nutritious quality. It is tolerant to frost, drought, saline soils and pests. One seed yield limitation is seed loss during the maturity stages. Two greenhouse experiments in Denmark and field experiments in Bolivia were carried out to determine seed shattering in landraces and cultivars with different growth habits. 15–21 % of the seed shattering in the fields took place whilst the plants still were flowering and 25–35 % during physiological maturity. Seed shattering varied between locations on the Bolivian Altiplano. Canahua types with the semi‐prostrate growth (‘lasta’) had the highest seed shattering rate in the greenhouse experiments. The Umacutama landrace had lower seed shattering (1 %) than the cultivar Kullaca (7.2 %) both of the ‘lasta’ type. Under field conditions, the cultivar Illimani with the erect growth (‘saihua’) had the highest seed shattering rate (6.4–33.7 %) at both locations and at four different sowing dates. The Umacutama had the lowest rate (0.5–1.5 %). There were no significant differences between plants of the ‘lasta’ and the ‘saihua’ types. The landrace had significantly less seed loss than the cultivars. However, in the greenhouse, the landrace yield was approximately 25 % lower than the yields of the cultivars. In general, canahua cultivars had higher yield compared to landraces, but also a higher seed shattering rate. Landraces may be used in breeding programmes to develop high‐yielding cultivars with reduced seed shattering.

  • germination responses of canahua Chenopodium pallidicaule aellen to temperature and sowing depth a crop growing under extreme conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P < 0.001). Seeds germinated at the lowest temperature (3 °C). The estimated base temperature was close to 0 °C. A polynomial function described well the relation between time to 50% germination (t50) and temperature in the interval from 3 to 24 °C resulting in a linear relationship between germination rate and temperature. Shallow sowing depth (5–25 mm) resulted in 80% germination at 15 °C. There were significant differences of emergence in relationship to burial depth (P < 0.001). Only few seedlings emerged when seeds were sown at 50 mm depth. We did not find significant differences in emergence of seedlings between Lasta and Saihua at 15 °C. Nevertheless, at 5 °C, seedlings of canahua belonging to the Lasta growth habit form did have higher germination rate as were shown for the Kullaca cultivar and the Umacutama landrace. This may be attributed to larger seed size of these cultivars.

  • Germination Responses of Cañahua (Chenopodium pallidicaule Aellen) to Temperature and Sowing Depth: A Crop Growing Under Extreme Conditions
    Journal of Agronomy and Crop Science, 2016
    Co-Authors: J P Rodriguez, Marten Sorensen, S E Jacobsen, Christian Andreasen
    Abstract:

    Canahua (Chenopodium pallidicaule) is grown in the Altiplano of Bolivia and Peru, between 3810 and 4200 m a.s.l. Rural indigenous households have cultivated the canahua as a subsistence crop for millennia. The seeds have a high content and quality of protein. We studied the relation between the following: (i) temperature and seed germination and (ii) the effect of temperature and sowing depth on seedling emergence of five cultivars and one landrace. Three experiments were conducted as follows: (i) seeds of a cultivar were germinated in Petri dishes at six temperatures (3, 5, 10, 14, 20 and 24 °C), (ii) sown at five depths (0, 5, 10, 25 and 50 mm) in a mixed peat soil substrate at three temperatures and (iii) one landrace (Lasta) and 5 cultivars (Lasta and Saihua growth habit) were sown in 6 depth (0, 5, 10, 25, 35 and 50 mm) in a sandy loam at two temperatures (5 and 15 °C). Temperature had significantly effect on the germination percentages of the plants (P