Table 1.

Proportion of ovules showing a functional germline and/or aposporous-like activity in the surrounding somatic tissue at the end of sporogenesis and gametogenesis in Ranunculus species and hybrids of different ploidy and origin

Taxa	n	Sporogenesis			n	Gametogenesis
		Fm (range)	pAI (range)	Abov (range)		MfG1 (range)	Ab/uG2 (range)
Parentals
R. notabilis 2x	86	0.96 (0.94–1.00)	0.0	0.04 (0.0–0.05)	66	0.96 (0.88–1.0)	0.04 (0.00–0.12)
R. carpaticola 2x	135	0.84 (0.83–0.90)	0.0	0.16 (0.10–0.18)	89	0.95 (0.93–0.96)	0.05 (0.00–0.06)
R. cassubicifolius 4x	98	0.95 (0.94–1.00)	0.0	0.05 (0.00–0.06)	103	0.94 (0.85–0.96)	0.06 (0.00–0.08)
Synthetic hybrids
R. carpaticola × R. notabilis 2x	257	0.67 (0.44–1.00)	0.11 (0.00–0.33)	0.22 (0.00–0.56)	289	0.41 (0.08–0.80)	0.59 (0.20–0.92)
R. cassubicifolius × R. notabilis 3x	191	0.69 (0.54–0.87)	0.15 (0.07–0.32)	0.15 (0.00–0.29)	173	0.21 (0.00–0.48)	0.79 (0.48–1.00)
Natural hybrids
R. carpaticola × R. cassubicifolius 6x	218	0.69 (0.56–0.96)	0.67 (0.50–0.87)	0.07 (0.00–0.13)	285	0.48 (0.17–0.75)	0.52 (0.25–0.81)

n, number of ovules analysed; Fm, functional megaspores; pAI, putative aposporous initial cells; Abov, aborted ovules; MfG, mature female gametophytes; Ab/uG, aborted/undeveloped gametophytes.

¹Embryo sacs with 8N just before cellularisation process were considered as mature.

²See details about classes of undeveloped gametophytes in the text.