The success of using the sterile insect technique (SIT) for Mediterranean fruit fly, Ceratitis capitata (Wiedemann), suppression programmes is dependent on the release into the field of sterile males that survive and compete successfully with wild males for matings with wild females. The effects of pre‐release aromatherapy using ginger root oil (GRO) and the addition of hydrolysed yeast (protein and other nutrients) to the fly diet, on sterile male dispersal, survival, sexual maturation and mating performance under laboratory and field conditions were evaluated. The interaction between providing protein and/or GRO treatment was also evaluated. Under field cage conditions, male mating performance was significantly higher in treatments with GRO but was unaffected by the provision of protein. There was no interaction between them. However, after releases under field conditions, survival of protein‐fed sterile males was significantly longer compared with protein‐deprived sterile males. The use of GRO should be incorporated into the sterile male–handling protocol for SIT programmes. In combination with the validation of the provision of these supplements, two new cage systems developed in the Madeira‐Med Programme were tested in comparison with the standard plastic adult rearing containers boxes for a more cost‐effective sterile male emergence, feeding, holding and collecting process at fly emergence and release facilities. This selected cages systems can handle approximately 1 million pupae and reduces manual labour and other costs while maintaining good sterile male quality.
RESUMO: O objetivo deste trabalho foi determinar a herança de formato e produção de frutos imaturos de 2 novas linhagens de C moschata. Para tal obtiveram-se as gerações Fl, F2 e retrocruzamentos para ambos os progenitores. Para a avaliação das diferentes gerações utilizou-se o delineamento em blocos ao acaso com 4 repetições e número variável de plantas por repetição. As estimativas dos parâmetros genéticos foram obtidas segundo o modelo de MATHER & JINKS. Foram avaliados o peso, comprimento e diâmetros próximos das extremidades peduncular e estilar dos frutos. Observou-se dominância para maior velocidade de crescimento dos frutos, caracterizada pelos maiores comprimentos, diâmetros e peso médio na geração F1. Observou-se também dominancia para frutos mais bojudos e com menor relação entre o comprimento e a média dos diâmetros. Devido ao maior peso médio de frutos, e não ao número, obteve-se heterose significativa (20,5%) para produção total por planta. Descritores: abobrinha (C moschata), herança, formato de fruto, produção INHERITANCE OF IMMATURE FRUIT SHAPE AND PRODUCTION IN SUMMER SQUASH (Cucúrbita moschata)ABSTRACT: Two inbred lines of C. moschata were crossed to obtain Fl, F2 and F1BC1 for both parental generations to study the inheritance of immature fruit shape and production. Four replications for each generation were choosen in a randomized block design. For each one of the eleven harvestings, the following parameters were evaluated: weight, length and diameter near peduncle and style ends of the immature fruits. Through the results it is concluded that there is dominance for higher growth speed of the fruits, which determines greater length, diameters and weight, when they were harvested at the same age, and, therefore, greater yield per plant.
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