return to main index

  mobile - desktop
follow us on facebook follow us on twitter follow us on YouTube link to us on LinkedIn
 
Click here for LLL Reptile & Supply
This Space Available
3 months for $50.00
Locate a business by name: click to list your business
search the classifieds. buy an account
events by zip code list an event
Search the forums             Search in:
News & Events: Herp Photo of the Day: Bearded Dragon . . . . . . . . . .  Tinley Reflections: An open letter from Mom . . . . . . . . . .  Greater Cincinnati Herp Society Meeting - Apr 02, 2024 . . . . . . . . . .  Calusa Herp Society Meeting - Apr 04, 2024 . . . . . . . . . .  Southwestern Herp Society Meeting - Apr 06, 2024 . . . . . . . . . .  Hamburg Reptile Show - Apr. 13, 2024 . . . . . . . . . .  St. Louis Herpetological Society - Apr 14, 2024 . . . . . . . . . .  San Diego Herp Society Meeting - Apr 16, 2024 . . . . . . . . . .  Suncoast Herp Society Meeting - Apr 20, 2024 . . . . . . . . . .  DFW Herp Society Meeting - Apr 20, 2024 . . . . . . . . . .  Colorado Herp Society Meeting - Apr 20, 2024 . . . . . . . . . .  Chicago Herpetological Society Meeting - Apr 21, 2024 . . . . . . . . . . 
Join USARK - Fight for your rights!
full banner - advertise here .50¢/1000 views
Layne Labs - Natural Diets for Pets & Wildlife
pool banner - $50 year

RE: C. bottae taxonomy

[ Login ] [ User Prefs ] [ Search Forums ] [ Back to Main Page ] [ Back to Taxonomy Discussion ] [ Reply To This Message ]
[ Register to Post ]

Posted by: RichardFHoyer at Fri May 16 18:23:34 2008  [ Report Abuse ] [ Email Message ] [ Show All Posts by RichardFHoyer ]  
   

CK,
Concerning your next to last paragraph and the results of crosses that have been made thus far, I suggest ignoring the point about large and dwarf morphs. In other words, both reciprocal crosses (3 each) were made between boas of the Sierra Nevada and Northwestern subcades. All such crosses proved to be viable in that full term neonates were produced. Since these crosses occurred in recent years, insufficient time has elapsed in order to determine if the F-1 offspring are fertile.

However with respect to reproductive compatibility, it should be noted that the original cross in 1996 was between a Southern Clade male and Northern Clade female which produced 4 full term neonates. Of the two surviving male and female F-1 progeny, the F-1 female has been determined to be fertile. That a cross between specimens that have been isolated from between 4.4 to 12.3 million years (according to Javier's paper) can reproduce, produce full term neonates, and produce progeny that are themselves fertile does not lend support to any assumption that matings between members of the two subclades would result in infertile progeny.

Secondly, F-1 results between crosses of the two large morph populations would not likely shed any light on the factor(s) that produce the large morph condition. That is because regardless of the male parent, large morph females of the Northwestern subclade have produced only large morph progeny. Nothing of certainty can be mentioned about what large morph females of the Sierra Nevada subclade would produce but odds are that they too would produce only large morph progeny if mated to males the Northwestern subclade or males of the Southern Clade. One would have to take such crosses to either backcross or F-2 generations to potentially reveal differences that may occur.

Richard F. Hoyer


   

[ Reply To This Message ] [ Subscribe to this Thread ] [ Show Entire Thread ]


>> Next Message:  RE: C. bottae taxonomy - CKing, Fri May 16 21:00:17 2008

<< Previous Message:  RE: C. bottae taxonomy - CKing, Thu May 15 02:58:19 2008