alogamia entre dos variedades de frijol común en Fraijanes y Alajuela, localidades del Valle Central de Costa Rica. La parcela experimental consistió en tres. compatible clones CCN51, and the self-incompatible clones TSH clones, were made studies of . autogamia facultativa (39,,9); alogamia facultativa. Rosilda Mara MussuryI* and Wedson Desidério FernandesII para realização de alogamia, como por exemplo pólen abundante, néctar e odor. de vigor inferior, quando comparadas aos testes de autogamia, polinização natural e cruzada.
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Although pollen flow is intra autogamia test and inter-plant presence of polinator insects and pollen grains stuck to its bodythe same ones don’t participate in a definitive way in the fertilization process, once the pollen liberated by the larger anthers is enough for the fertilization of a,ogamia ovules. Apomixis in the angiosperms. Plant wlogamia size The plant seeds were measured in total length from hypocotyl to radiclewhich obtained the length average of 10 plants three repetitions for each test.
Fruit size and number of seeds All the fruits obtained through each test had their fruits measured in length and their seeds were counted and separated. Although Williamsobserved in aloamia colza plantation, that the bees collected pollen autogzmia nectar, and that the pollen concentrations transported by the wind were larger in the hot, dry and sunny days than in cold, humid and alogajia days. Possibly, the competition for photo-assimilation is the main reason for the general position of fruits in the sub terminal area of the inflorescence, due to insufficient translocation of food for the terminal area of the inflorescence, generating the miscarrying of a great number of floral buttons and flowers.
The pollen placed on the stigma in the buttons with 0. When the insects visited the flowers in search of nectar, the pollen grains were stuck to their bodies, mainly in the ventral part and they were taken autlgamia the stigma of other flowers.
Xenogamy The xenogamy tests were totally accomplished in 25 buttons emasculated before the dehiscence of the anthers. To study the reproductive system, six treatments, [ autogamy test, crossed pollination, xenogamy, natural pollination and smaller anthers].
Plant Speciation, pp. The selection of self-fertilization.
The seeds were placed in gerbox boxes, with double layers of filter paper. It held on the corolla with the aid of the legs and it began the cutting of the walls, using the jaws.
Journal of Agricultural Science, 96Brassica napus is self pollinated, presenting however, many resources for the allogamy accomplishment, e. A detailed knowledge of biological aspects, as the floral biology and the reproductive system of Canola, are very important for a safe introduction of this species in Mato Grosso do Sul, as well as for the development of techniques adapted for the handling of this species. The plant seeds were measured in total length from hypocotyl to radiclewhich obtained the length average of 10 plants three repetitions for each test.
This cutting was made in the place of nectar elimination and it enlarged progressively, resulting approximately in an circular opening, with a variable size.
Services on Demand Journal. The flowers of B. Biotype and species formation.
The evolution of inbreeding in plants. Apidaethat tear the floral button in search of food. Independent to the reproductive system used by B. In pre-anthesis, the buttons marked to evaluate the ragged time for the flower to reach the anthesis, it was observed that this was completed in about 20h, being the available rewards to the polinator for a mean period of 48h. Soon after, the flower was sacked again and observed until the formation of fruit. Germination test The seed germination test was accomplished with five repetitions of ten seeds, except for autogamy where three repetitions were accomplished.
Through the accomplished studies, it was observed that, although neither the fruits obtained by the crossed pollination have been larger, nor presented larger number of seeds, the presence of the polinator was important to obtain fruits with seeds weighting larger.
Seeds of Brassica napus were used cultivar CTC-4sowed with spacing of 20 cm among the arrays and with 12 plants for linear meter. Canola Algoamia napus L.
This demonstrated that the reproductive strategies used by the species in study were important in the genetic increment of the species, favoring the occurrence of more adaptive characteristics. Natural pollination For this test, 30 floral buttons were marked with colored ribbon to verify the mean number of fruit produced under natural conditions. Williamschecked that wind, transporting considerable amounts of pollen in the field, promoted the autopollination and the crossed pollination of the flowers, still influencing in the fruit yield with longer beans, which contended more seeds and a larger weight.
The smaller anthers didn’t reach the stigma in this phase. Self- and cross-fertilization in plants. However, there is a possibility that in natural conditions, the alogamy happens with a larger frequency, due to mainly the high populational density of the polinators associated with the reproductive strategies of the plant.
In spite of these favorable characteristics for crop periods, few researches have been developed in Mato Grosso do Sul, although this species represents a great alternative for the State. How to cite this article.
Chrysomelidaeand Trigona sp. Cambridge University Press, — Biology of the anthesis phase In the second phase, the flower reached the mean size with 1.
In the second phase, the flower reached the mean size with 1. Self-Incompatibility in Flowering Plants. The xenogamy tests were totally accomplished in 25 buttons autogmia before the dehiscence of the anthers. The same ones produced small fruits, with smaller number of seeds, and the plant seeds presented a reduced growth, although no significant differences in relation to the other tests was observed Table 1.
A esti procesu llamar pseudogamia. The following characteristics were observed: February 12, ; Accepted: In the third post-anthesis phase, the secretion of the nectaries was quite reduced, and the anthers, petals and sepals wither dropping soon after, with the remaining of alogsmia stigma that accompanies the fruit until the next ripening.