
02/02/2025
📝 𝙼𝚊𝚗𝚊𝚐𝚎𝚖𝚎𝚗𝚝 𝚘𝚏 𝚍𝚒𝚟𝚎𝚛𝚜𝚒𝚝𝚢 𝚊𝚗𝚍 𝚒𝚗𝚋𝚛𝚎𝚎𝚍𝚒𝚗𝚐 𝚠𝚑𝚎𝚗 𝚒𝚖𝚙𝚘𝚛𝚝𝚒𝚗𝚐 𝚗𝚎𝚠 𝚜𝚝𝚘𝚌𝚔 𝚒𝚗𝚝𝚘 𝚊𝚗 𝚒𝚗𝚋𝚛𝚎𝚍 𝚙𝚘𝚙𝚞𝚕𝚊𝚝𝚒𝚘𝚗
As a bridge to (or from?) my recent post about the rapid change in the longhair, here is a really cool and easy-to-understand study about how "new blood" would ideally be handled in in**ed populations.
Here are some bullet points:
─ Setting inbreeding limits on breeding pairs actually decreases long-term genetic diversity
─ New blood is badly managed, if it spreads to the whole population quickly
─ Instead, low MK (mean kinship) individuals should be paired with other low MK, and high with high, with occasional intermingling
─ In practice, this does mean the birth of differing bloodlines
─ Managing new blood like this would mean the benefit from it would last much, much longer
"An individual cannot pass its merit for inbreeding to its progeny—inbreeding is not heritable. Indeed, the current results show the potential danger in mate allocation to minimize progeny inbreeding without considering longer-term impacts."
"Valuable low–low MKi pairs would tend to be highly related, especially in smaller populations, and yet be rejected for allocation because of a limit on progeny inbreeding coefficient."
Let us remember that high inbreeding (in a population) is a symptom, not a cause! ☝️ The factors that cause high inbreeding (in a population) should be controlled in selection instead. A less in**ed combination is never automatically better for the breed, especially if the value came from data of just 5-6 generations. Let's not plan litters based on non-merits!
💌 https://pmc.ncbi.nlm.nih.gov/articles/PMC10445517/
Photo: AC THE FIVE FAR STARS "Brimi" (2012 Glen x Malta) & AC DRAGOS CAMBRIAN "Pip" (2019 Riddick x Sindi) demonstrating their "mean" 😈 kinship 😆