. 2012 Jul;191(3):725–738. doi: 10.1534/genetics.112.140780

Table 2 . Means of chromosome numbers and ratios for no pairing, autosyndesis, and allosyndesis within each genome in hybrids.

	A genome			B genome			C genome
Hybrids	No pairing	Autosyndesis	Allosyndesis	No pairing	Autosyndesis	Allosyndesis	No pairing	Autosyndesis	Allosyndesis
A.B	4.74 (0.47^a)	1.93^b (0.19^b^,*)	3.33^b (0.33^c^,**)	3.53 (0.44^b)	1.15^c (0.14^c^,*)	3.33^b (0.42^b**)	—	—	—
A.C	2.64 (0.26^b)	3.50^a (0.35^a^,*)	3.86^b (0.39^c^,**)	—	—	—	2.23 (0.25^b)	2.91^d (0.32^b^,*)	3.86^b (0.43^b^,**)
B.C	—	—	—	4.72 (0.59^a)	1.23^c (0.15^c^,*)	2.06^c (0.26^c^,**)	4.72 (0.53^a)	2.23^a (0.25^b^,^c^,*)	2.06^c (0.23^c^,**)
A.C.B	0.64 (0.06^c)	3.68^a (0.37^a^,*)	5.68^a (0.57^b^,**)	4.32 (0.54^a^,^b)	1.00^c (0.13^c)	2.68^c^, ^b (0.34^c^,^b)	0.32 (0.04^c)	2.36^a^,^d (0.26^b^,^c^,*)	6.32^a (0.70^a^,**)
BB.A	5.65 (0.57^a)	1.68^b (0.17^b^,^c^,*)	2.68^c (0.27^c^,**)	1.56 (0.20^c)	1.06^c (0.13^c^,*)	2.68^b^,^c (0.34^b^,^c^,**)	—	—	—
CC.A	5.18 (0.52^a)	0.74^c (0.07^c^,*)	4.09^b (0.41^c^,**)	—	—	—	0.74 (0.08^c)	0.59^c (0.07^c^,*)	4.09^b (0.45^b^,**)
CC.B	—	—	—	4.80 (0.60^a)	1.40^c (0.18^c^,*)	1.80^c (0.23^c^,**)	1.60 (0.18^b^,^c)	1.20^b (0.13^b^,^c^,*)	1.80^c (0.20^c^,**)
Average	4.21 (0.42)	2.07 (0.21*)	3.72 (0.37**)	4.34 (0.54)	1.19 (0.15*)	2.47 (0.31**)	3.79 (0.42)	2.34 (0.26*)	2.87 (0.32**)

For the calculation of the total chromosome numbers involved in autosyndesis within each genome in hybrids (A.B, A.C, B.C, A.C.B), the bivalent, trivalent, and quadrivalent of the same genome mean two, three, and four chromosomes, while the trivalent of two genomes, such as A-A-C, is taken as 1.5 A-genome chromosomes for autosyndesis and 0.5 A-genome chromosome and 1 C-genome chromosome for allosyndesis, and the quadrivalent (A-A-A-C) is divided into 2.5 A-genome chromosomes for autosyndesis and 0.5 A-genome chromosome and 1 C-genome chromosome for allosyndesis. For the calculation of the total chromosome number for allosyndesis within each genome, the bivalent means one chromosome for one of two genomes, the chromosome shared by two associations in trivalent or quadrivalent is taken as one-half for one genome and another half for the other genome. The ratios of autosyndesis, allosyndesis, and no pairing within each genome are the observed chromosome numbers/the total chromosome numbers of each genome. In digenomic triploid hybrids (BB.A, CC.A, and CC.B), the homologous bivalents in Table 1 are excluded from the chromosomes for autosyndesis. For the division of pairing in trivalents, the B-B pairing in A-B-B of BB.A is assumed homologous pairing, and A-B pairing is allosyndetic pairing; for B-B-B, both homologous and autosyndetic pairings are assumed. The same calculation is made for CC.A and CC.B. Single (*) and double (**) asterisks indicate that the averages of autosyndesis or allosyndesis, respectively, from different genomes in each hybrid are insignificantly different (the chi-square test: α = 0.05).

^a,b,c

Groups significantly different by χ² -test, p < 0.05.