Carbohydrate metabolism and fertility related genes high expression levels promote heterosis in autotetraploid rice harboring double neutral genes

Rice

Table 2 Meiotic chromosome configurations at diakinesis and metaphase I in F₁ hybrid and parents

Material	Stage	No.	I	II	III	IV
Material	Stage	No.	I	II	III	ring shape	chain shape	X shape	frying pan shape	OK shape	Total
T449	Diakinesis	124	3.21 ± 2.87	5.73 ± 4.30	1.23 ± 1.50	2.91 ± 1.84	1.03 ± 1.04	2.13 ± 1.60	0.81 ± 1.03	0.52 ± 0.78	7.41 ± 2.02
T449	Metaphase I	53	4.13 ± 3.15	5.36 ± 3.42	1.26 ± 1.30	3.06 ± 1.94	1.28 ± 1.23	2.08 ± 1.48	0.49 ± 0.72	0.43 ± 0.69	7.34 ± 2.23
H1	Diakinesis	135	0.59 ± 1.41	6.10 ± 3.91	1.28 ± 2.29	4.79 ± 2.20	0.44 ± 0.80	2.33 ± 1.93	0.15 ± 0.41	0.14 ± 0.37	7.84 ± 2.13
H1	Metaphase I	53	2.51 ± 7.50	6.53 ± 4.52	0.92 ± 2.08	4.06 ± 2.28	0.43 ± 0.82	2.53 ± 1.85	0.17 ± 0.47	0.23 ± 0.42	7.42 ± 2.80
F₁	Diakinesis	98	0.51 ± 1.52	9.07 ± 4.45	0.08 ± 0.31	4.42 ± 2.15	0.28 ± 0.53	2.30 ± 1.53	0.18 ± 0.54	0.09 ± 0.29	7.28 ± 2.28
F₁	Metaphase I	99	0.65 ± 1.19	12.57 ± 5.36	0.08 ± 0.27	1.95 ± 1.79	0.42 ± 0.72	2.76 ± 1.61	0.14 ± 0.53	0.21 ± 0.44	5.49 ± 2.65

Note: No. represents the number of cells. I, II, III and IV represent univalent, bivalent, trivalent and tetravalent, respectively. Each number in columns I - IV represents the average number of chromosome configuration ± SD / cell