Cacao breeding programs focus in obtaining cacao varieties with important traits to both producers and consumers. A vital step for plant breeders is the characterization of the genetic material kept in germplasm banks in order to describe its level of diversity, and find interesting traits both morphologically and molecularly. In this way, the investigator will monitor how useful the accessions could be, determine duplications, and manage the bank appropriately. In this study, we aimed to test: the potential of ISSR (Interspread Sequence Repeats) markers to differentiate 46 cacao accessions maintained in Tingo Maria - Perú, and the similarity relationships between the accessions. In this research, the results showed that ISSR, despite its dominance nature, could establish eye-catching associations, such as, the grouping of Trinitario accessions into a common cluster

Cacao breeding programs focus in obtaining cacao varieties with important traits to both producers and consumers. A vital step for plant breeders is the characterization of the genetic material kept in germplasm banks in order to describe its level of diversity, and find interesting traits both morphologically and molecularly. In this way, the investigator will monitor how useful the accessions could be, determine duplications, and manage the bank appropriately. In this study, we aimed to test: the potential of ISSR (Interspread Sequence Repeats) markers to differentiate 46 cacao accessions maintained in Tingo Maria - Perú, and the similarity relationships between the accessions. In this research, the results showed that ISSR, despite its dominance nature, could establish eye-catching associations, such as, the grouping of Trinitario accessions into a common cluster

Cacao breeding programs focus in obtaining cacao varieties with important traits to both producers and consumers. A vital step for plant breeders is the characterization of the genetic material kept in germplasm banks in order to describe its level of diversity, and find interesting traits both morphologically and molecularly. In this way, the investigator will monitor how useful the accessions could be, determine duplications, and manage the bank appropriately. In this study, we aimed to test: the potential of ISSR (Interspread Sequence Repeats) markers to differentiate 46 cacao accessions maintained in Tingo Maria - Perú, and the similarity relationships between the accessions. In this research, the results showed that ISSR, despite its dominance nature, could establish eye-catching associations, such as, the grouping of Trinitario accessions into a common cluster

Se estudió la diversidad genética mediante la técnica de RAPD en 37 accesiones de una colección del norte del Perú de “chago” o “mauka” Mirabilis expansa; Se obtuvieron 60 marcadores polimórficos con 9 de 19 iniciadores decaméricos. Se calcularon los índices de iniciador RAPD, obteniéndose los valores más altos con los iniciadores OPA04, OPA09 y OPA13, lo cual sugiere su uso valioso en futuras investigaciones con RAPD en colecciones más grandes o para especies de Mirabilis. Con el coeficiente de Simple Matching y el algoritmo UPGMA se obtuvo un dendograma del cual, a un coeficiente de 1, se observan 31 grupos. Esto indicaría unos 16.216 % de posibles duplicados en la colección de Germoplasma. Con un índice de similitud de 0.85 se encontró que se forman 8 clusters o grupos, sin coincidir en su mayoría con los 5 morfotipos reportados. Además se realizó un...

El yacón es un cultivo de origen andino caracterizado por almacenar principalmente fructooligosacáridos en sus raíces; sin embargo, no se conoce aún cuanta diversidad genética a nivel molecular existe en la especie. En el presente estudio se caracterizó 30 accesiones de yacones cultivados provenientes del norte, centro y sur del Perú mediante la técnica de RAPDs, utilizando 34 iniciadores decaméricos; con los cuales se muestrearon 166 fragmentos genómicos, de las cuales el 30.7% fueron polimórficos. Al 0.58 de similitud se formaron 7 grupos de yacones. El primero de ellos con 22 accesiones agrupa a todas las provenientes del norte y del sur, y algunas del centro, los grupos restantes solamente contienen accesiones del centro. No se logró encontrar material duplicado y la mayor diversidad estuvo concentrada en las accesiones provenientes del centro del Perú. El AMOVA...