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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Columbia University PressNew York.

Journal of Agricultural Science, 91, A study developed by Williamsconfirmed that colza flowers produced nectar and pollen in abundance and they were extremely attractive to the bees. Cambridge University Press, — The matured nectaries secreted nectar, beginning the first phase of the floral opening pre-anthesis.

Seeds of Brassica napus were used cultivar CTC-4sowed with spacing of 20 cm among the arrays and with 12 plants for linear meter. Auttogamia weight of the seeds The mean weight of the seeds was obtained accurately through the evaluation of five lots of ten seeds in analytic scale of 0.

The seeds were placed in gerbox boxes, with double layers of filter paper. Probably, the scent developed an important role when provoking instinctive reactions, especially in insects.

Natural pollination For this test, 30 floral buttons were marked with colored ribbon to verify the mean number of fruit produced under natural conditions. Pollination mechanisms, reproduction, and plant breeding. Services on Demand Journal.

In reason of the asynchronism and intermittence during the opening of their flowers, the floral activity during one day, stays intense, promoting a constant flow of reward to the insects visitors. Immediately after the anthesis, the flowers were autotamia. After seven days, the boxes were placed in a germinator and maintained during a period of five days, the number of normal plant seeds was computed at the end.

Reproducción vexetal

Journal of Agricultural Science, 71This 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. The mean weight of the seeds was obtained accurately through the evaluation of five lots of ten seeds in analytic scale of 0.


Los mofos pueden ser dioicos o monoicos. A esti procesu llamar pseudogamia. Por eso dizse qu’estos sacos embrionarios surden por un procesu de apomeiosis “ensin meiosis”.

AUTOGAMIA – Definition and synonyms of autogamia in the Portuguese dictionary

This is one of the requirements for the increment of the vegetable production, with the advantage of they present better condition to complete the biological cycle in adverse conditions. Gametophytic apomixis and evolution in plants. The activity of the nectaries was evaluated every two hours, and the schedule of larger nectar production was evaluated autogama the observation of the polinators occurrence.

Tese Mestrado Rio de Janeiro.

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Biology of the anthesis phase In the second phase, the flower reached the mean size with 1. Pueden granar cuando hai mugor, inclusive n’ausencia de nutrientes. Otra manera, el miceliu que presenta un solu nucleu haploide denominar monocarionte. This fact was confirmed through the sacking of the floral button and posterior transformation in fruit.

N’otres pallabres, la autogamia nestes especies coesiste cola alogamia nun equilibriu adaptativu. It held on the corolla with the aid of the legs and it began the cutting of the walls, using the jaws. Plant Speciation, pp. According to Alberts et al.

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 the stigma that accompanies the fruit until the next ripening. Evolution above the Species Level. 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.

With the objective of understanding the mechanism of canola reproduction, in order to obtain subsidies for its handling and appliance, its floral biology and reproductive system were studied. There are nectaries located in the center of the flower, two between the ovary and the short stamens and two between the long stamens and the petals Fig 1.


Meaning of “autogamia” in the Portuguese dictionary

Monographs on Theoretical and Applied Genetics non. The intra-floral nectaries produced nectar in great amount during the whole pre-anthesis phase.

To observe the fertility of the pollen grains of the smaller anthers, the larger anthers of 20 floral buttons were removed with 0. Apomixis in higher plants. The evolution of inbreeding in plants. The crossed autogamla was evaluated in 20 floral buttons, emasculated before the dehiscence of the anthers. In agreement with Williams and Eisikowtichthe flowers of B. Autogamy The autogamy was evaluated through the sacking of 20 inflorescences and of 20 individualized floral buttons of 0.

The pollen put down the stigma with high concentration of starch, which represented a primary source of energy for the polinators.

Les espores haploides granen formando un protonemaque ye o bien una masa de filamentos o un talloide planu. Biotype and species formation. November 23, ; Revised: Inferences from floral ecology and molecular genetic variation. Academia Mexicana de Ciencies.

Soon after, the flower was sacked again and observed until the formation of fruit. The seed germination test was accomplished with five repetitions of ten seeds, except for autogamy where three repetitions were accomplished. Revista Brasileira de Sementes, 9 3: 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.

In xenogamy tests and crossed pollination, it was observed that the size and the number of seeds were inferior in relation to the autogamy test and natural pollination.