This is important because the rate of decrease of this donor fragment is slower than for unlinked regions and many undesirable genes that negatively affect crop performance may be linked to the target gene from the donor parent i. Curr Sci. Biotechnology, Biotechnological Equipment. Selection strategies for marker-assisted backcrossing with high-throughput marker systems. Jeffreys, Y. The end product of a backcrossing programme is to obtain lines that are as similar as possible to the RP but also possess the target traits. Development of rice introgression lines with brown plant hopper resistance and KDML grain quality characteristics through marker-assisted selection.
Marker assisted backcrossing (MABC) is one of the most promising approaches is the use of molecular markers to identify and select genes.
Marker-assisted backcrossing is routinely applied in breeding programs for gene introgression. While selection theory is the most important tool for the design of.
Selection Theory for MarkerAssisted Backcrossing
The world's population is increasing very rapidly, reducing the cultivable land of rice, decreasing table water, emerging new diseases and pests, and the climate.
While selection theory is the most important tool for the design of breeding programs for improvement of quantitative characters, no general selection theory is available for marker-assisted backcrossing.
Mol Gen Genet. Articles from Genetics are provided here courtesy of Genetics Society of America. Right, model of the sugar beet genome with 9 chromosomes of length 1 M.
Schematic representation of development of resistant rice variety through marker-assisted backcrossing MABC.
no. MQTL could be applied to improve inbred lines using marker-assisted selection. In plants, several population types [F2, recombinant inbred lines, backcross mid, approximately 45 pptv) is considerably greater than that expected.
After four backcrosses, the recovery ratios of the recurrent-parental genome at non-target loci for D and D were However at later generations i.
Genetic and physical analysis of the rice bacterial blight disease resistance locus Xa Marker-assisted breeding.
Video: Marker assisted backcrossing pptv Using nuclear science in marker-assisted plant breeding
Bacterial blight resistance A novel BB resistance gene, Xa23identified from Oryza rufipogon was introgressed into three popular restorer lines Minghui63, YR and Y for wild abortive cytoplasmic male sterility by marker-assisted backcross breeding approach in combination with artificial inoculation and stringent phenotypic selections.
National Center for Biotechnology InformationU.
After producing the BC 1 generation, 89 plants carrying the target gene were preselected and analyzed for the 25 markers.
Parental Selection B. Thus, VOCs can be used as phenotypic markers which can assist with a. Eight genetic lines of plants used and backcrossed for three generations On-line monitoring of volatile organic compounds at pptv levels by.
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Expected recovery of recurrent parent genome comparing conventional and marker assisted backcrossing in subsequent generations.
Abstract The world's population is increasing very rapidly, reducing the cultivable land of rice, decreasing table water, emerging new diseases and pests, and the climate changes are major issues that must be addressed to researchers to develop sustainable crop varieties with resistance to biotic and abiotic stresses.
A total of 75 polymorphic SSR markers distributed throughout rice genome were then used to determine the recurrent genetic background of the 50 selected ILs from the BC 3 F 4 generation.
Marker-assisted backcrossing mab for rice submegence tolerance in Mekong delta.
It should be emphasized that backcross progeny with the target trait must be selected based on phenotype during each round of backcrossing.