• Subject: HYB: pairing of TB and pumila chromosomes
• From: &* W* <i*@telp.com>
• Date: Fri, 1 Mar 2013 16:26:57 -0700

From _The World of Irises_, page 176:
"Cytological studies in plants of 36 (12 8 / 8 8) and 44 (12 12 / 12 8) 
chromosomes (Randolph and Heinig 1953) showed that in addition to the 
pairing of two of the matching sets, chromosomes of the odd sets of 8 and 
12 chromosomes often formed four additional pairs, indicating that four 
chromosomes in each set were enough alike to pair in the absence of more 
homologous partners."
I think this accounts for some IBs being more fertile than one would 
expect.


   

Tom Waters   


Telperion Oasis ~ www.telp.com/irises    


Cuyamungue, New Mexico, USA (zone 6)  

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