haploidy การใช้

• The combination of doubled haploidy and molecular marker provides the short cut.
• Combined with doubled haploidy it becomes more effective.
• The over-usage of doubled haploidy may reduce genetic variation in breeding germplasm.
• Hence one has to take several factors into consideration before deploying doubled haploidy in breeding programmes.
• Another disadvantage associated with the double haploidy is the cost involved in establishing tissue culture and growth facilities.
• The number of species amenable to doubled haploidy has reached a staggering 250 in just a few decades.
• Conventional inbreeding procedures take six generations to achieve approximately complete homozygosity, whereas doubled haploidy achieves it in one generation.
• This is possible with doubled haploidy organisms because of their true breeding nature and because they can conveniently be produced in large numbers.
• Chen " et al . " ( 1994 ) used marker assisted backcross conversion with doubled haploidy of BC1 individuals to select stripe rust resistant lines in barley.
• Here, backcrossing is carried out until a desired level of recombination has occurred and genetic markers are used to detect desired recombinant chromosome substitution lines in the target region, which can be fixed by doubled haploidy.
• Other hypotheses point to the function of imprinting as a way of establishing the proper amount of expression or functional haploidy, much like silencing the extra X-chromosome in females ( see section on Barr bodies ).
• More specific benefits include the possibility of seed propagation as an alternative to vegetative multiplication in ornamentals, and in species such as trees in which long life cycles and inbreeding depression preclude traditional breeding methods, doubled haploidy provides new alternatives.
• I attempted to fix the problem ( see " Revision history of Doubled haploidy " and " Talk : Doubled haploidy " ), but could not arrive at a consensus for any course of action that would bring the article up to Wikipedia standards.
• I attempted to fix the problem ( see " Revision history of Doubled haploidy " and " Talk : Doubled haploidy " ), but could not arrive at a consensus for any course of action that would bring the article up to Wikipedia standards.