Table 4.
Spike characters of the four genotypes of the F2:3, F3:4, and F4:5 lines.
| Progeny | Genotype/variety |
||||||
|---|---|---|---|---|---|---|---|
| RRPP | RRpp | rrPP | rrpp | Jinmai47 | Karcagi | ||
| F2:3 (2014–2015) | Spikelets spike-1 | 19.2 ± 1.3a | 19.6 ± 1.5a | 20.7 ± 1.0b | 21.0 ± 1.7b | 22.3 ± 1.6 | 19.0 ± 1.0 |
| Florets initiated spikelet-1 | 9.5 ± 1.3a | 10.0 ± 1.1a | 9.4 ± 0.8a | 9.8 ± 1.0a | 9.3 ± 1.0 | 9.4 ± 1.2 | |
| Florets initiated spike-1 | 186.4 ± 5.0c | 193.0 ± 4.6b | 200.1 ± 7.1a | 206.2 ± 6.2a | 210.1 ± 5.4 | 183.7 ± 6.0 | |
| Fertile florets spike-1 | 52.0 ± 1.8b | 58.1 ± 2.0a | 47.0 ± 1.6c | 52.1 ± 2.2b | 53.6 ± 2.4 | 57.0 ± 2.8 | |
| Fertility∗ | 0.28 ± 0.01b | 0.31 ± 0.01a | 0.23 ± 0.01d | 0.25 ± 0.01c | 0.26 ± 0.01 | 0.31 ± 0.02 | |
| F3:4 (2015–2016) | Spikelets spike-1 | 19.0 ± 1.0a | 19.3 ± 1.2a | 20.2 ± 1.5b | 20.6 ± 1.0b | 21.0 ± 1.2 | 20.0 ± 1.3 |
| Florets initiated spikelet-1 | 9.1 ± 0.5a | 9.0 ± 1.0a | 9.5 ± 0.8a | 9.2 ± 1.1a | 9.6 ± 0.6 | 8.9 ± 0.5 | |
| Florets initiated spike-1 | 171.0 ± 3.2c | 176.1 ± 5.0c | 183.6 ± 4.5b | 190.7 ± 3.3a | 200.1 ± 6.0 | 181.4 ± 5.1 | |
| Fertile florets spike-1 | 47.2 ± 2.0b | 52.1 ± 2.3a | 42.2 ± 2.4d | 45.0 ± 3.0c | 50.0 ± 3.4 | 53.1 ± 4.1 | |
| Fertility∗ | 0.28 ± 0.01b | 0.30 ± 0.02a | 0.23 ± 0.01d | 0.24 ± 0.01c | 0.25 ± 0.01 | 0.29 ± 0.01 | |
| F4:5 (2016–2017) | Spikelets spike-1 | 19.0 ± 1.5a | 19.5 ± 1.0a | 20.8 ± 1.6b | 21.3 ± 1.2b | 21.2 ± 1.4 | 19.4 ± 1.1 |
| Florets initiated spikelet-1 | 9.0 ± 0.5b | 9.7 ± 1.0a | 9.6 ± 1.0a | 9.9 ± 0.7a | 9.0 ± 1.0 | 9.5 ± 0.6 | |
| Florets initiated spike-1 | 170.3 ± 4.2d | 177.6 ± 5.3c | 192.5 ± 4.6b | 197.1 ± 5.5a | 190.5 ± 5.0 | 195.4 ± 4.3 | |
| Fertile florets spike-1 | 50.0 ± 3.2b | 55.1 ± 4.0a | 47.6 ± 3.7c | 50.5 ± 2.6b | 49.5 ± 2.9 | 55.0 ± 3.6 | |
| Fertility∗ | 0.29 ± 0.01b | 0.31 ± 0.01a | 0.25 ± 0.01d | 0.26 ± 0.01c | 0.26 ± 0.01 | 0.28 ± 0.01 | |
∗Fertility is estimated as the ratio of fertility florets to total florets per spike of the main shoot spike. All data are the mean of each genotype. Different letters (“a,” “b,” “c,” and “d”) within rows indicate differences significant at P < 0.05; parents were not included.