Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid
Introduction. Papaya growers prefer hermaphrodite plants for their fruit characteristics, but they must wait until the beginning of flowering to identify and select plants. Currently, it is possible to determine the sex of papaya plants in the seedling stage using molecular markers. Objective. The objective of this research was to compare the vegetative and productive growth of papaya plants Pococí hybrid, sexed by two systems: conventional (CS) and molecular (MS). Materials and methods. For the conventional sexing system the traditional method of farmers sowing was used, which consists of planting three seedlings and determine the sex by visual inspection, eliminate female plants and leave a hermaphrodite plant per sowing site. In the molecular sexing system, sex was determined in the seedbed based on the molecular markers, and then a hermaphrodite plant was established per planting site. The trial was conducted on the farm of a papaya producer located in the Rita de Guapiles, Limon province, Costa Rica, between March and October of 2010. Results. No significant differences were observed for plant height and stem diameter with both sexing systems, indicating that the period of initial competition to which the seedlings were subjected in the SC system did not affect vegetative development. For the productive variables, significant differences were found between both sexing systems. SM plants presented flowering and fruit set at an earlier age. The total production and fruit quality were similar between both treatments. Conclusion. The sex-determining procedure did not influence the growth, development, and yield of the plants under this study condition, which indicates the possibility of using SM plants for cultivation of the Pococí hybrid.
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Universidad de Costa Rica
2019
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Barrantes-Santamaría, Walter Vicente Loría-Quirós, Carlos Gómez-Alpízar, Luis |
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Barrantes-Santamaría, Walter Vicente Loría-Quirós, Carlos Gómez-Alpízar, Luis Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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Barrantes-Santamaría, Walter Vicente Loría-Quirós, Carlos Gómez-Alpízar, Luis |
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Barrantes-Santamaría, Walter Vicente |
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Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid |
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evaluation of two-sex determining systems in papaya plants (carica papaya) pococí hybrid |
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Introduction. Papaya growers prefer hermaphrodite plants for their fruit characteristics, but they must wait until the beginning of flowering to identify and select plants. Currently, it is possible to determine the sex of papaya plants in the seedling stage using molecular markers. Objective. The objective of this research was to compare the vegetative and productive growth of papaya plants Pococí hybrid, sexed by two systems: conventional (CS) and molecular (MS). Materials and methods. For the conventional sexing system the traditional method of farmers sowing was used, which consists of planting three seedlings and determine the sex by visual inspection, eliminate female plants and leave a hermaphrodite plant per sowing site. In the molecular sexing system, sex was determined in the seedbed based on the molecular markers, and then a hermaphrodite plant was established per planting site. The trial was conducted on the farm of a papaya producer located in the Rita de Guapiles, Limon province, Costa Rica, between March and October of 2010. Results. No significant differences were observed for plant height and stem diameter with both sexing systems, indicating that the period of initial competition to which the seedlings were subjected in the SC system did not affect vegetative development. For the productive variables, significant differences were found between both sexing systems. SM plants presented flowering and fruit set at an earlier age. The total production and fruit quality were similar between both treatments. Conclusion. The sex-determining procedure did not influence the growth, development, and yield of the plants under this study condition, which indicates the possibility of using SM plants for cultivation of the Pococí hybrid. |
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oai:portal.ucr.ac.cr:article349162023-06-16T13:46:32Z Evaluation of two-sex determining systems in papaya plants (Carica papaya) Pococí hybrid Evaluación de dos sistemas de sexado en plantas de papaya (Carica papaya) híbrido Pococí Barrantes-Santamaría, Walter Vicente Loría-Quirós, Carlos Gómez-Alpízar, Luis sex determination agronomic characteristics crop performance tropical fruits determinación del sexo Características agronómicas rendimiento de cultivo frutas tropicales Introduction. Papaya growers prefer hermaphrodite plants for their fruit characteristics, but they must wait until the beginning of flowering to identify and select plants. Currently, it is possible to determine the sex of papaya plants in the seedling stage using molecular markers. Objective. The objective of this research was to compare the vegetative and productive growth of papaya plants Pococí hybrid, sexed by two systems: conventional (CS) and molecular (MS). Materials and methods. For the conventional sexing system the traditional method of farmers sowing was used, which consists of planting three seedlings and determine the sex by visual inspection, eliminate female plants and leave a hermaphrodite plant per sowing site. In the molecular sexing system, sex was determined in the seedbed based on the molecular markers, and then a hermaphrodite plant was established per planting site. The trial was conducted on the farm of a papaya producer located in the Rita de Guapiles, Limon province, Costa Rica, between March and October of 2010. Results. No significant differences were observed for plant height and stem diameter with both sexing systems, indicating that the period of initial competition to which the seedlings were subjected in the SC system did not affect vegetative development. For the productive variables, significant differences were found between both sexing systems. SM plants presented flowering and fruit set at an earlier age. The total production and fruit quality were similar between both treatments. Conclusion. The sex-determining procedure did not influence the growth, development, and yield of the plants under this study condition, which indicates the possibility of using SM plants for cultivation of the Pococí hybrid. Introducción. Los productores de papaya prefieren plantas hermafroditas por las características de sus frutos; pero deben esperar hasta el inicio de la floración para identificar y seleccionar las plantas. Actualmente, es posible determinar el sexo de las plantas de papaya en estado de plántula mediante marcadores moleculares. Objetivo. El objetivo de esta investigación fue comparar el crecimiento vegetativo y productivo de plantas de papaya híbrido Pococí, sexadas mediante dos sistemas: convencional (SC) y molecular (SM). Materiales y métodos. Para el sistema de sexado convencional se empleó el método tradicional de siembra de los agricultores, que consiste en plantar tres plántulas y determinar el sexo por inspección visual, eliminar las plantas femeninas y dejar una planta hermafrodita por sitio de siembra. En el sistema de sexado molecular se determinó el sexo en el almácigo con base en marcadores moleculares y luego se estableció una planta hermafrodita por sitio de siembra. El ensayo se realizó en la finca de un productor de papaya localizada en la Rita de Guápiles, provincia de Limón, Costa Rica, entre marzo y octubre del año 2010. Resultados. No se observaron diferencias significativas para altura de planta y diámetro de tallo con ambos sistemas de sexado, lo que indica que el periodo de competencia inicial a que fueron sometidas las plántulas en el sistema de SC no afectó el desarrollo vegetativo. Para las variables productivas, se encontraron diferencias significativas entre ambos sistemas de sexado. Las plantas con SM presentaron floración y cuaje de frutos a más temprana edad. La producción total y la calidad de fruta fueron similares entre ambos tratamientos. Conclusión. El sistema de sexado no influyó sobre el crecimiento, desarrollo y rendimiento de las plantas bajo las condiciones de este estudio, lo que indica la posibilidad de utilizar plantas SM para el cultivo del híbrido Pococí. Universidad de Costa Rica 2019-05-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article application/pdf application/epub+zip text/html audio/mpeg audio/mpeg text/xml https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916 10.15517/am.v30i2.34916 Agronomía Mesoamericana; 2019: Agronomía Mesoamericana: Vol. 30, Issue 2 (May-August); 437-446 Agronomía Mesoamericana; 2019: Agronomía Mesoamericana: Vol. 30, Nº 2 (Mayo-agosto); 437-446 Agronomía Mesoamericana; 2019: Agronomía Mesoamericana: Vol. 30, Issue 2 (May-August); 437-446 2215-3608 1021-7444 spa eng https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/37661 https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/37662 https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/37666 https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/38020 https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/38021 https://revistas.ucr.ac.cr/index.php/agromeso/article/view/34916/38395 |