Oligo-painting and GISH reveal meiotic chromosome biases and increased meiotic stability in synthetic allotetraploid Cucumis ×hytivus with dysploid parental karyotypes

Table 2 Meiotic chromosome behavior in S₄ and S₁₄ generations of the synthetic allotetraploid Cucumis ×hytivus

Plant group	No. of PMCs at MI	No. (%) of PMCs with 19 homologous bivalents	No. (%) of PMCs with univalents		No. (%) of PMCs with lagged bivalents		No. (%) of PMCs with inter-genomic pairings	No. of PMCs at AI	No. (%) of PMCs with chromosome lagging
Plant group	No. of PMCs at MI	No. (%) of PMCs with 19 homologous bivalents	C	H	C	H	No. (%) of PMCs with inter-genomic pairings	No. of PMCs at AI	C	H
S₄	143	49 (34.3)	34 (23.8)	93 (65.0)	22 (15.4)	105 (73.4)	35 (24.5)	95	26 (27.4)	75 (79.0)
S₁₄	131	98 (74.8)^**	9 (6.9)^**	31 (23.7)^*	6 (4.6)^**	68 (51.9)^**	13 (9.9)^**	113	11 (9.7)^*	63 (55.8)^*

MI metaphase I, AI anaphase I, PMC pollen mother cell, C C-subgenome, H H-subgenome; statistical test for comparisons with S₄ (t-test): ^*, p < 0.05; ^**, p < 0.01

ISSN: 1471-2229