In what groups we can divide the Bengal Tiger?

[Rishi]

Assumptions & opinions aside..how much CONCRETE INFORMATION do we have till  now on this topic..?? 
(I am producing all the info i have, with sources)

• NE population was confirmed to be genetically unique & expected to possibly have Indo-Chinese blood. ( https://www.telegraphindia.com/1160208/j...QWi2ORX5oM )
  

• Tigers residing the high hills of Bhutan might or might not show any local adaptation, no studies done..only speculations.
  

• Tigers of Sunderban are visibly different in size & stature..They also weigh less, with ever recorded max. being a megre 172kg. BUT were confirmed to be genetically similar to the central India population. ( http://indiasendangered.com/sundarban-ti...ral-india/ )
  

• As far as the rest of India is concerned, it's more-or-less confirmed, that the Northernmost population (contagious to the rest until recent artificial segregation by expansion of Technosphere in India's northern plains) are of greater average size, that keeps reducing towards India's Southern tip. No data on genetic differences..yet.
  

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PS: The "Western Indian Tiger Landscape" of Ranth (~60), Kuno(10+) & Sariska(20-25) populations have ALL tigers sourced from only a dozen cats...

( https://bigcatrescue.org/wild-tigers-bec...oo-inbred/ )

( http://www.ranthamborenationalpark.com/b...nthambore/ ) ..& thus, looks similar. Reply