scholarly journals Improvement and Selection of Honeybees Assisted by Molecular Markers

Author(s):  
Maria Claudia Colla Ruvolo-Takasusuki ◽  
Arielen Patricia Balista Casagrande Pozza ◽  
Ana Paula Nunes Zago Oliveira ◽  
Rejane Stubs Parpinelli ◽  
Fabiana Martins Costa-Maia ◽  
...  
2012 ◽  
Vol 58 (No. 3) ◽  
pp. 137-144 ◽  
Author(s):  
R. Mahajan ◽  
P. Gupta

Earlier breeders used phenotypic selection based on morphological characteristics to improve tree varieties. These selections often take many cycles of breeding and backcrossing in order to place desired characteristics. But today the knowledge has paved the way for a much deeper understanding of the mechanics of cell biology and the hereditary process itself. Breeders are presented with numerous possibilities of altering the behaviour of existing varieties. Linkage between molecular markers can be translated to genetic linkage maps, which have become an important tool in plant genetics. They may choose to use marker-assisted approaches in order to facilitate the selection of favourable combinations of genes that occur naturally within a tree species.  


2008 ◽  
Vol 78 (3) ◽  
pp. 455-461 ◽  
Author(s):  
Abdoulaye A. Djimdé ◽  
Bakary Fofana ◽  
Souleymane Dama ◽  
Bakary Sidibe ◽  
Issaka Sagara ◽  
...  

2015 ◽  
Vol 06 ◽  
Author(s):  
Yongzhong Chen ◽  
Baoming Wang ◽  
Jianjun Chen ◽  
Xiangnan Wang ◽  
Rui Wang ◽  
...  

2007 ◽  
pp. 117-122 ◽  
Author(s):  
A. Peil ◽  
M.-V. Hanke ◽  
H. Flachowsky ◽  
K. Richter ◽  
T. Garcia ◽  
...  

2015 ◽  
pp. 73-78 ◽  
Author(s):  
E. Zini ◽  
M. Raffeiner ◽  
G. Di Gaspero ◽  
R. Eibach ◽  
M.S. Grando ◽  
...  

2001 ◽  
Vol 67 (8) ◽  
pp. 3385-3390 ◽  
Author(s):  
Luis M. Larraya ◽  
Gúmer Pérez ◽  
Iñaki Iribarren ◽  
Juan A. Blanco ◽  
Mikel Alfonso ◽  
...  

ABSTRACT The edible fungus Pleurotus ostreatus (oyster mushroom) is an industrially produced heterothallic homobasidiomycete whose mating is controlled by a bifactorial tetrapolar genetic system. Two mating loci (matA and matB) control different steps of hyphal fusion, nuclear migration, and nuclear sorting during the onset and progress of the dikaryotic growth. Previous studies have shown that the segregation of the alleles present at thematB locus differs from that expected for a single locus because (i) new nonparental B alleles appeared in the progeny and (ii) there was a distortion in the segregation of the genomic regions close to this mating locus. In this study, we pursued these observations by using a genetic approach based on the identification of molecular markers linked to the matBlocus that allowed us to dissect it into two genetically linked subunits (matBα and matBβ) and to correlate the presence of specific matBα and matAalleles with differences in monokaryotic growth rate. The availability of these molecular markers and the mating type dependence of growth rate in monokaryons can be helpful for marker-assisted selection of fast-growing monokaryons to be used in the construction of dikaryons able to colonize the substrate faster than the competitors responsible for reductions in the industrial yield of this fungus.


Author(s):  
Luiz Sergio Costa Duarte Filho ◽  
Danielson Ramos Ribeiro ◽  
Allison Vieira da Silva

The species Myrciaria floridunda O. Berg, popularly known as cambuí, belongs to the Myrtaceae family. Cambui is a native, non-endemic species that occur in diverse environments in Central America and South America. They are slow-growing plants with a shrub or sub-shrub habit. The fruits, the product of interest of the species, are small, spherical berries orange or red in colorturning to wine colorwhen they are ripe. The exploitation of the species is still mostly extractivist, carried out by traditional local families who, in times of fruiting of the species, leverage their income by selling fruits at fairs. The fruits can be eaten fresh, in the form of jellies, liquor or wine. To study the genetic diversity of the species using ISSR-type molecular markers, it is necessary to first isolate DNA in sufficient quality and quantity. Here, leaves for DNA extraction were collected from the active germplasm bank of the Federal University of Alagoas, Brazil. The DNA of the species was extracted using CTAB detergent methodology with modifications adapted to the species. Twelve ISSR primers were tested on DNA from two cambui genotypes. Of the twelve primers, eight were selected due to their polymorphism index above 50%, namely: UFAL-2, UFAL-3, UFAL-5, UFAL-6, UFAL-7, UFAL-8, UFAL-9 and UFAL-10.


2007 ◽  
pp. 100-104
Author(s):  
Stella Molnár ◽  
Zsuzsanna Galbács ◽  
Gábor Halász ◽  
Sarolta Hoffmann ◽  
Anikó Veres ◽  
...  

Incorporation of competitive quality and resistance against the most important fungal diseases (powdery and downy mildew) in a cultivar is one of the most important aims of grapevine breeding. In the 20th century, the most advanced results in grapevine resistance breeding were achieved by French researchers. They used resistant cultivars in more than 30% of their growing areas. In these varieties, North American wild Vitisspecies were the resistance gene sources. The discovery of immunity-like resistance of Muscadinia rotundifolia opened new perspectives in resistance breeding. M. rotundifolia harbours a dominant powdery mildew gene, providing resistance in highquality cultivars after back-crosses with V. vinifera varieties. M. rotundifolia has been involved in the Hungarian grape breeding programs since 1996, thanks to a French-Hungarian variety exchange. In addition to traditional selection methods, application of MAS (Marker Assisted Selection) based on various types ofmolecular markers, can provide additional tools for these efforts. Run1 locus, responsible for powdery mildew resistance, was identified in Muscadinia rotundifolia. Molecular markers closely linked to this locus are very significant in screening progenies deriving from M. rotundifolia and V. vinifera crosses, making possible the discrimination between resistant and susceptible genotypes at DNA level. In our analyses BC5 progeny of {(M. rotundifola×V. vinifera) BC4}×Cardinal (V. vinifera) tested for powdery symptoms were analysed with PCR-RFLP (GLP1- 12P1P3) and microsatellite markers (VMC4f3.1, VMC8g9). Our results proved the applicability of the linked markers and reliability of marker assisted selection.


Sign in / Sign up

Export Citation Format

Share Document