Download scientific diagram | Análisis mendeliano de la autofecundación de una planta transgénica, que porta una copia del transgene que confiere tolerancia. A utilização da AI no melhoramento de plantas é feita há bastante tempo, mas .. a auto-incompatibilidade possa limitar a possibilidade de se autofecundar e. En Fitogenetecnia, se refiere a al capacidad de autofecundación de una planta, o al cruzamiento entre plantas, sin existir impedimento genético, morfológico o.

Author: Tadal Gardabar
Country: Syria
Language: English (Spanish)
Genre: Medical
Published (Last): 23 January 2016
Pages: 467
PDF File Size: 4.25 Mb
ePub File Size: 7.35 Mb
ISBN: 705-5-21448-554-1
Downloads: 30610
Price: Free* [*Free Regsitration Required]
Uploader: Samull

SIS may be homomorphic, when there are no floral modifications related to the SI process, or heteromorphic, when floral modifications occur together with the SI process. On the other hand, the progeny SP Table 3which has moderate diameter size, parental mean, 2.

Sexual Plant Reproduction, v.

Inbreeding in sugarcane varieties

This study was undertaken to obtain and evaluate first-generation inbred lines that may be used for further crosses and determine the extent of autofecundacoin depression in sugarcane. Existen mecanismos que impiden ou reducen a autogamia nas anxiospermas, tales como a autoincompatibilidadea heterostiliaa hercogamia e a dioecia.

Sugarcane species are allogamous, i. Trends in Plant Sciencev. Columbia University Press, New York. Crop Sciencev. The Plant Journalv. Most autogamous plants need the intervention of pollinators to transfer the pollen from the anther to the stigma of the flower because they are unable to self-pollinate.

Change the order of display of the official languages of Canada Plzntas first French first Option to display the non-official languages Spanish or Portuguese Neither Spanish Portuguese Display definitions, contexts, etc. How does self-pollination evolve?

Yield components as indicators of drought tolerance of sugarcane. It is important to verify the plantad viability of higher plants in segregated and clone-derived populations. Biotype and species formation.


Precision requires that the term self-pollination be restricted to those plants that accomplish pollination without an external pollinator. Stalk height values were 9. A line which has autofecundaciln selfed for several generations resulting in a high degree of homozygoty. Apomixis in higher plants.

Bioscience, Biotechnology and Biochemistryv. The inbreeding depression estimates Table 4 obtained for soluble solids, stalk number, stalk height, stalk diameter and stalk weight were compatible with the reported estimates in the literature for yield characters in other crops.

autofecunndacion In the absence of over dominance in the genetic control of characters, it is theoretically possible to select plnatas individuals with superior performance than the parental clone, within the segregated populations derived from clones.

The wide segregation for stalk height and stalk diameter permitted the selection of Existem casos de controle bifatorial e mesmo polifatorial da AIG. But, selfing a variety with high number of stalks e. At flowering, stalks were isolated in the crossing house to avoid foreign pollen and obtain only self-pollinated seeds. A one-way ANOVA was performed with five variables to determine the existence of variability between parents and self.

Reprodución das plantas – Wikipedia, a enciclopedia libre

Os musgos poden ser dioicos ou monoicos. A collection of writing tools that cover the many facets of English and French grammar, style and usage.

Twelve months after planting the levels of soluble solids and stalk number, height, diameter and weight were evaluated. According to VEGAcrosses between inbred lines produce high gains although hybrid vigor may also be obtained in crosses between varieties, as in sugarcane.

Existem diversos maneiras de superar a barreira da AI. Do homomorphic and heteromorphic self-incompatibility systems have the same sporophytic mechanism? The soluble solids segregation observed in low and even high-Brix varieties increases the possibility of quick improvement in this trait. Number of incompatibility alleles in clover and other species Heredity, v.


A stalk puncher was used to obtain a juice sample from the center of the mid portion internodes, in each millable stalk per row. Embryology of Angiosperms, B.

Reprodución das plantas

A mucilaxe atrae os anterozoides por quimiotaxe. Plantzs self-incompatibility by CO 2 gas treatment in Brassica campestris: The SI reaction may occurr from pollen germination impairing up to pollen tube breakdown. The different amount of number of stalks for self and parents for the soluble solids analysis was due to difference between the genetic stability of the plants from self and parents.

Superiority can be attributed to the accumulation of dominant effect genes dominance hypothesis or to the heterozygotic condition at several loci of favorable characteristic over dominance hypothesis HALLAUER, Diversity and evolutionary biology of tropical flowers Cambridge tropical biology series.

Inbreeding depression estimates allow the inference of population genetic structure and predominant gene action in the genetic control of characters. Cell-cell signaling in the self-incompatibility response. Auxin modification of the incompatibility response in Theobroma cacao. The transfer of pollen from the anther of a flower to the stigma of the same flower Nowadays, the research has put emphasis on the identification and understanding of the molecular and cellular processes leading to the recognition and rejection of the self-incompatible pollen, including the identification, localization and sequencing autofecundaicon proteins, enzymes and genes involved.

Planhas, no null values were obtained for inbreeding in stalk diameter, and only the self-pollination of SP resulted in higher depression