> Why would a Chiannina have more
> heat tolerence then any other
> continental breed?
I'm not really certain that it does. I initially got interested in Chiangus some years ago after viewing straight Chianina bulls and some Romagnola bulls at the Houston Livestock Show. (Certainly didn't want anything as large as a straight Chianina)
I did a little checking back then and found that Chianina apparently were developed in areas of Italy that were a good bit hotter than the "homeland" of many of the other continental breeds (or at least that's my impression). And I also read a few reports from test stations, ranch to rail, etc. that showed the Chiangus to have a lot of merit from an overall carcass standpoint --- but I just stayed with Beefmaster and Brangus cattle at the time. (I acknowledge that those reports may have just been self-serving, cherry picked results put out by someone with a particular agenda).
I went to replacement bull auction earlier this year with the intention of buying a black Brangus bull. But I viewed the pen of Chiangus for quite some time, liked their dispositions, butts, etc. And they were raised in a part of South Texas that is even more inhospitable than my area. Then, when nobody seemed to want to bid on these guys I picked up one for what I thought was a real good price. Time will tell.
I have to admit that, based on my observations and discussions with a lot of cattlemen in my general area, the continental breeds seem to do just fine here as well. For example, I have neighbors that run straight Simmental and Charolais and they seem to do just fine in the summer. I suspect that I, and many others in these parts, am a little too hung up on the issue of heat & humidity tolerance. Probably I got into that mindset some years ago when early in the summer a neighbor put 45 fresh Simmental heifers in a big pasture next to me, along with two young straight black Angus bulls. It turned out to be a particularly hot and opressive summer and it seemed like every time I looked the Angus bulls were standing in the shade of pecan trees (maybe they were just smart). Anyway, the following spring the guy's calf crop wasn't nearly what I thought it should have been and I attributed that to the bulls, perhaps wrongly so. Some of the heifers may have been problems. But I know that in recent years a lot more breeders in southeast Texas are offering straight black Angus cattle and they seem to be doing well, so maybe the heat thing is not really a valid issue.
Sorry for the long winded reply!