Friday , August 6 2021

North White Nose: A New Hope for Rescue of IVF



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Sudan was the last one

The new study raises hope to save one of the last animals of this kind.

The sacrifice of the bloodthirsty, northern white rhino population is reduced to only two females, which are not able to breed.

DNA evidence shows that Rhino is more closely related than previously thought to a southern white cousin.

Creating Rhino hybrids using IVF will probably have a positive outcome, scientists say, although this option is considered the last resort.

White rhymes are divided into two divided populations that live in the north and south of Africa about a million years ago.

But extensive analysis of DNA from live noses and museum patterns shows that the northern and southern populations are mixed and breed from time to time after that date, perhaps even 14,000 years ago.

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Najin (L) and Fatu: the only remaining northern white rinot

"Despite the fact that they began to unravel one million years ago, we show that they exchanged genes during that period, perhaps recently as the last ice age, when the African savannah expanded and re-united the two populations," said Dr. Michael Bruford of University of Cardiff for BBC News.

"So if you recently exchanged genes, that can mean I can do it now."

Cross-breeding with the help of reproductive technology can potentially act to save the northern white nose from the current situation, he said.

How many northern and southern white noses remain?

The northern white nose was once common in the north of the African continent, including Uganda, South Sudan, DRC and Chad.

Unlawful hunting in order to meet the requirements for wrestling wrestling caused a rapid fall in the wild, and the species of rape subsistence was declared extinct in the wild 2008.

Earlier this year, Sudan, the last male Northern White Rhino, died at the age of 45.

There are two women – his daughter and granddaughter, who live in conservation at Ol Peak in Kenya, where they are kept for 24 hours. However, both have their own health problems and naturally can not be raised.

South White White is located in South Africa, including South Africa, Namibia and Zimbabwe.

The numbers dropped to several hundred people a year ago, but conservation has led to recovery. About 20,000 people are in protected areas and private game reservations.

What Should Save the Northern White Rhinoceros?

The survival of the northern white nose looks pale and relies on conservation efforts, involved in IVF and cloning.

Unprecedented storage of frozen semen from male northern white noses still exists, but conservatives are divided around how to use it.

In July, one team took eggs from a female south american – about 20,000 in the wild – and fertilized them with frozen semen of white white northern male to create hybrid embryos.

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Southern White Rhino in Londolozi reserves in South Africa

A new study suggests that such type of access could be paid, given that the two rhinorrhoids are genetically closer than they once thought.

"We think it improves the chances," said prof. Bruford. "It's hard to predict what could happen if we cross two subspecies, but given the current opportunities for the northern white nose, it becomes more viable if other approaches fail."

Other options include the use of frozen tissue from a broad northern white rhinitis pool to create stem cells that have the ability to develop eggs and sperm.

This would avoid diluting the gene pool, but it is more challenging to achieve.

Research by scientists in the UK, South Africa, the Czech Republic, Austria, Germany and the United States was published in the journal Proceedings of the Royal Society of London B.

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