The liquid in which the material is stored also is important. For example, freezing removes some chemicals from the membrane that surrounds the sperm cells from poultry. Those compounds had been important. They helped the sperm cell recognize an egg. Adding certain sugars and lipids to the solution in which bird sperm are stored may replace the lost chemicals, Long says. Altering the protective fluid and freezing solution also may improve a sperm cell’s survival — and fertility. Long’s team reported promising research with turkey sperm in December 2013 and again in June 2014 in the journal Cryobiology.
A gene bank can hold many different types of materials. There may be seeds that will grow into whole plants, or eggs and sperm that can be united to create an animal. Or there may be animal embryos, which can be implanted into surrogate mothers. Some gene banks store stem cells, which scientists may one day use to produce eggs and sperm. Banks can even store reproductive organs, such as ovaries and testes. After thawing, these organs can go into animals of other breeds or even other species. Later, when mature, these organs will produce sperm or eggs with the genes of the animal from which they had been harvested.
Gene banks are a backup for the future, but they’ve already proven useful. In 2004, for instance, SVF took a few frozen embryos from a rare breed, the Tennessee fainting goat, and implanted them into a more common Nubian goat. That work produced Chip, known as “Chocolate Chip” at birth. Chip proved that the process could work, and now he’s a sign of hope for rare breeds.
The liquid in which the material is stored also is important. For example, freezing removes some chemicals from the membrane that surrounds the sperm cells from poultry. Those compounds had been important. They helped the sperm cell recognize an egg. Adding certain sugars and lipids to the solution in which bird sperm are stored may replace the lost chemicals, Long says. Altering the protective fluid and freezing solution also may improve a sperm cell’s survival — and fertility. Long’s team reported promising research with turkey sperm in December 2013 and again in June 2014 in the journal Cryobiology.A gene bank can hold many different types of materials. There may be seeds that will grow into whole plants, or eggs and sperm that can be united to create an animal. Or there may be animal embryos, which can be implanted into surrogate mothers. Some gene banks store stem cells, which scientists may one day use to produce eggs and sperm. Banks can even store reproductive organs, such as ovaries and testes. After thawing, these organs can go into animals of other breeds or even other species. Later, when mature, these organs will produce sperm or eggs with the genes of the animal from which they had been harvested.Gene banks are a backup for the future, but they’ve already proven useful. In 2004, for instance, SVF took a few frozen embryos from a rare breed, the Tennessee fainting goat, and implanted them into a more common Nubian goat. That work produced Chip, known as “Chocolate Chip” at birth. Chip proved that the process could work, and now he’s a sign of hope for rare breeds.
การแปล กรุณารอสักครู่..