Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns
Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed physical characteristics such as sizes and weight and the corresponding sex using a complete randomized block design with four replications in a 2 x 3 factorial arrangement. The third experiment evaluated the relationship between seed vigor based on four seed emergence stages and sexual expression, using a completely randomized design with 5 replications in a 2 × 4 factorial arrangement. The fourth experiment tested for the two cultivars used, three isozyme systems: peroxidase (PER), esterase (EST) and leucineaminopeptidase (LAP) using leaf tissue from 4 or 5 leaves seedlings. There were no difference between seeds classified by size or weight and sexual expression. In Tainung 1 hybrid, seeds with higher initial vigor developed a higher proportion of hermaphrodite plants in contrast with a lower proportion of female plants from seed with less vigor. Seedlings with lower leaf number developed a higher number of hermaphrodite plants. PER, EST and LAP systems did not allow the identification of the sex of the two cultivars studied. Based on results it can be concluded for the hybrid seeds Tainung 1 that for seeds of uniform size and weight, sown on the same date and with similar agronomic conditions that seedlings of the greater vigor produced higher proportion of hermaphrodite plants. Additionally, within seedling stages I is possible to determine sex differentiation with by the number of leaves.
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Corporación Colombiana de Investigación Agropecuaria (Agrosavia)
2008
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| Subjects: | Determinación del sexo, Papayas, Frutales, |
| Online Access: | http://revista.corpoica.org.co/index.php/revista/article/view/101 http://hdl.handle.net/20.500.12324/33851 |
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Determinación del sexo Papayas Frutales Determinación del sexo Papayas Frutales |
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Determinación del sexo Papayas Frutales Determinación del sexo Papayas Frutales Arango, Laura Victoria de Rezende, Carlos Ramirez de Carvalho, Samuel Pereira Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
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Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed physical characteristics such as sizes and weight and the corresponding sex using a complete randomized block design with four replications in a 2 x 3 factorial arrangement. The third experiment evaluated the relationship between seed vigor based on four seed emergence stages and sexual expression, using a completely randomized design with 5 replications in a 2 × 4 factorial arrangement. The fourth experiment tested for the two cultivars used, three isozyme systems: peroxidase (PER), esterase (EST) and leucineaminopeptidase (LAP) using leaf tissue from 4 or 5 leaves seedlings. There were no difference between seeds classified by size or weight and sexual expression. In Tainung 1 hybrid, seeds with higher initial vigor developed a higher proportion of hermaphrodite plants in contrast with a lower proportion of female plants from seed with less vigor. Seedlings with lower leaf number developed a higher number of hermaphrodite plants. PER, EST and LAP systems did not allow the identification of the sex of the two cultivars studied. Based on results it can be concluded for the hybrid seeds Tainung 1 that for seeds of uniform size and weight, sown on the same date and with similar agronomic conditions that seedlings of the greater vigor produced higher proportion of hermaphrodite plants. Additionally, within seedling stages I is possible to determine sex differentiation with by the number of leaves. |
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info:eu-repo/semantics/article |
| topic_facet |
Determinación del sexo Papayas Frutales |
| author |
Arango, Laura Victoria de Rezende, Carlos Ramirez de Carvalho, Samuel Pereira |
| author_facet |
Arango, Laura Victoria de Rezende, Carlos Ramirez de Carvalho, Samuel Pereira |
| author_sort |
Arango, Laura Victoria |
| title |
Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
| title_short |
Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
| title_full |
Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
| title_fullStr |
Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
| title_full_unstemmed |
Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
| title_sort |
early identification of papaya sex type from seed physical characters and seedlings isozyme patterns |
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Corporación Colombiana de Investigación Agropecuaria (Agrosavia) |
| publishDate |
2008 |
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http://revista.corpoica.org.co/index.php/revista/article/view/101 http://hdl.handle.net/20.500.12324/33851 |
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AT arangolauravictoria earlyidentificationofpapayasextypefromseedphysicalcharactersandseedlingsisozymepatterns AT derezendecarlosramirez earlyidentificationofpapayasextypefromseedphysicalcharactersandseedlingsisozymepatterns AT decarvalhosamuelpereira earlyidentificationofpapayasextypefromseedphysicalcharactersandseedlingsisozymepatterns AT arangolauravictoria identificacaoantecipadadosexodomamoeiropeloscaracteresfisicosdassementesepadroesisoenzimaticosdasmudas AT derezendecarlosramirez identificacaoantecipadadosexodomamoeiropeloscaracteresfisicosdassementesepadroesisoenzimaticosdasmudas AT decarvalhosamuelpereira identificacaoantecipadadosexodomamoeiropeloscaracteresfisicosdassementesepadroesisoenzimaticosdasmudas |
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1756052832852639744 |
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dig-bac-20.500.12324-338512020-07-08T21:23:56Z Early identification of papaya sex type from seed physical characters and seedlings isozyme patterns Identificação antecipada do sexo do mamoeiro pelos caracteres físicos das sementes e padrões isoenzimáticos das mudas Arango, Laura Victoria de Rezende, Carlos Ramirez de Carvalho, Samuel Pereira Determinación del sexo Papayas Frutales Identification of papaya sex can only be done four months after transplanting. The possibility of earlier sex identification either with isoenzymatic patterns or physical seed traits were evaluated in two commercial seeds: the hybrid Tainung 1 and Improved Sunrise Solo 72/12 four experiments were carried out in the Lavras municipality, Minas Gerais (Brazil). The first two experiments evaluated the relationship of seed physical characteristics such as sizes and weight and the corresponding sex using a complete randomized block design with four replications in a 2 x 3 factorial arrangement. The third experiment evaluated the relationship between seed vigor based on four seed emergence stages and sexual expression, using a completely randomized design with 5 replications in a 2 × 4 factorial arrangement. The fourth experiment tested for the two cultivars used, three isozyme systems: peroxidase (PER), esterase (EST) and leucineaminopeptidase (LAP) using leaf tissue from 4 or 5 leaves seedlings. There were no difference between seeds classified by size or weight and sexual expression. In Tainung 1 hybrid, seeds with higher initial vigor developed a higher proportion of hermaphrodite plants in contrast with a lower proportion of female plants from seed with less vigor. Seedlings with lower leaf number developed a higher number of hermaphrodite plants. PER, EST and LAP systems did not allow the identification of the sex of the two cultivars studied. Based on results it can be concluded for the hybrid seeds Tainung 1 that for seeds of uniform size and weight, sown on the same date and with similar agronomic conditions that seedlings of the greater vigor produced higher proportion of hermaphrodite plants. Additionally, within seedling stages I is possible to determine sex differentiation with by the number of leaves. A sexagem do mamoeiro só pode ser feita depois de quatro meses de transplante. Para identificar antecipadamente o sexo das plantas avaliou-se a possibilidade do uso de caracteres físicos das sementes, bem como padrões isoenzimáticos das mudas de dois mamoeiros comerciais: híbrido Tainung 1 e a variedade Improved Sunrise Solo 72/12. Foram conduzidos quatro experimentos: nos dois primeiros experimentos, avaliou-se a relação de caracteres físicos das sementes, como peso e tamanho e a expressão sexual da planta resultante, utilizando um delineamento completamente casualizado com quatro repetições em esquema factorial 2 × 3. No terceiro experimento avaliou-se a relação entre o vigor das plântulas baseado em 4 estadios de emergência das sementes e a expressão sexual da planta resultante utilizando um delineamento inteiramente casualizado com cinco repetições e esquema fatorial 2 × 4. No quarto experimento testou-se para as duas cultivares, três sistemas isoenzimáticos: esterase (EST), peroxidase (PO) e leucine-aminopeptidase (LAP), utilizando tecidos foliares de mudas com 4 a 5 folhas. Não houve diferença entre as sementes classificadas por tamanho e peso quanto à expressão sexual da planta. A porcentagem de emergência foi significativamente inferior para as sementes clasificadas na seleção 10 y con pouco peso. No híbrido Tainung 1 as plântulas que apresentaram maior vigor na emergência das sementes originaram maior proporção de plantas hermafroditas, em contraste com a menor proporção de plantas femininas oriundas de mudas com menor velocidade de emergência de suas sementes. Mudas com menor número de folhas originaram maior proporção de plantas hermafroditas. Os sistemas PO, EST e LAP não permitiram diferenciar os sexos das plantas nas duas cultivares. Com base nos resultados anteriores, pode-se afirmar que sementes do híbrido Tainung 1, de tamanho e peso uniformes, semeadas na mesma data e com condições agronômicas semelhantes, que apresentam maior vigor na emergência, produziram maior proporção de plantas hermafroditas. Adicionalmente, com a diferenciação das mudas pelo número de folhas dentro de cada estádio de emergência, é possível determinar precocemente o sexo das plantas e obter mudas com sexo definido antes do plantio. Papaya 2018-11-06T20:41:23Z 2018-11-06T20:41:23Z 2008 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://revista.corpoica.org.co/index.php/revista/article/view/101 10.21930/rcta.vol9_num1_art:101 http://hdl.handle.net/20.500.12324/33851 reponame:Biblioteca Digital Agropecuaria de Colombia repourl:https://repository.agrosavia.co instname:Corporación colombiana de investigación agropecuaria AGROSAVIA spa http://revista.corpoica.org.co/index.php/revista/article/view/101/101 application/pdf Colombia Corporación Colombiana de Investigación Agropecuaria (Agrosavia) Corpoica Ciencia y Tecnología Agropecuaria; Vol 9 No 1 (2008); 22-29 Corpoica Ciencia y Tecnología Agropecuaria; Vol. 9 Núm. 1 (2008); 22-29 revista Corpoica Ciência e Tecnologia Agropecuária; v. 9 n. 1 (2008); 22-29 2500-5308 0122-8706 10.21930/rcta.vol9-num1 |