BRS 500 B2RF is a high-yielding cotton cultivar with transgenic resistance to lepidopteran pests and tolerance to the herbicide glyphosate. Additionally, BRS 500 B2RF has resistance to Ramularia leaf spot and partial resistance to root-knot nematode. It represents an important contribution to sustainable cotton production in Brazil.
Keywords:
Fiber yield; Gossypium hirsutum; Mycosphaerella areola; Meloidogyne incognita.
| Traits | BRS 500 B2RF | BRS 432 B2RF |
|---|---|---|
| Fiber percentage (%) a | 40.3 | 40.0 |
| Boll weight (g) a | 5.6 | 5.3 |
| Appearance of the first flower (days)* | 50-55 | 50-55 |
| First boll (days)* | 110-120 | 110-120 |
| Fiber length (mm) a | 30.4 | 30.9 |
| Uniformity index (%) a | 84.0 | 84.6 |
| Fiber strength (gf tex-1) a | 30.8 | 30.7 |
| Micronaire indexa | 4.6 | 4.5 |
| Fiber elongation (%) a | 6.7 | 6.4 |
| Fiber reflectance (%) a | 78.8 | 79.8 |
| Yellowness a | 9.2 | 8.9 |
| SFI index (%) a | 7.5 | 7.1 |
| Ramularia leaf spot b | 1.1¥ | 2.9¥ |
| Root-knot nematode c | 0.2 | 10.1** |
| CY (kg ha-1) | LY (kg ha-1) | LP (%) | Len (mm) | Str (gf tex-1) | |
|---|---|---|---|---|---|
| Error | 468777 | 95620 | 1.05 | 0.59 | 2.31 |
| df | 1377 | 1020 | 1020 | 1071 | 1071 |
| N | 108 | 80 | 80 | 84 | 84 |
| BRS 500 B2RF | 5666.5 | 2578.8 | 40.3 | 30.4 | 30.8 |
| BRS 432 B2RF | 5186.9 | 2383.4 | 40.0 | 30.9 | 30.7 |
| t-value | 5.15** | 4.00** | 2.33* | -4.22** | 0.49 |
| Counties/Brazilian State | Seasons | BRS 500 B2RF | BRS 432 B2RF | PCC¥ | CV* | |||
|---|---|---|---|---|---|---|---|---|
| CY (kg ha-1) | LY (kg ha-1) | CY (kg ha-1) | LY (kg ha-1) | CY | LY | |||
| Luís Eduardo Magalhães - BA | 2017/18 | 8.420 | 3.500 | 7.734 | 3.165 | 108.9 | 110.6 | 8.4 |
| Riachão das Neves - BA | 2017/18 | 8.858 | 3.803 | 6.908 | 2.910 | 128.2 | 130.7 | 8.0 |
| São Desidério - BA | 2017/18 | 8.117 | 3.431 | 6.662 | 2.732 | 121.8 | 125.6 | 13.0 |
| Uruçuí - PI | 2017/18 | 5.624 | 2.258 | 5.004 | 2.003 | 112.4 | 112.7 | 13.3 |
| Barbalha - CE | 2018 | 6.762 | 2.852 | 5.969 | 2.505 | 113.3 | 113.8 | 22.9 |
| Santo Antônio de Goiás - GO | 2017/18 | 6.132 | 2.429 | 5.190 | 2.048 | 118.2 | 118.6 | 20.4 |
| Cristalina - GO | 2017/18 | 5.321 | 2.148 | 3.873 | 1.496 | 137.4 | 143.6 | 13.5 |
| Sorriso - MT | 2018** | 5.960 | 2.225 | 6.705 | 2.522 | 88.9 | 88.2 | 11.3 |
| Campo Verde - MT | 2017/18** | 6.186 | 2.466 | 5.120 | 1.935 | 120.8 | 127.4 | 9.9 |
| Sapezal - MT | 2018** | 7.026 | 2.594 | 6.086 | 2.174 | 115.5 | 119.3 | 10.8 |
| Chapadão do Sul - MS | 2018** | 5.423 | - | 4.874 | - | 111.3 | - | 10.6 |
| Cambará - PR | 2017/18 | 1.998 | - | 1.851 | - | 107.9 | - | 22.3 |
| Palmas -TO | 2018 | 6.185 | - | 4.409 | - | 140.3 | - | 12.2 |
| Boa Vista - RR | 2018 | 2.378 | - | 1.722 | - | 138.1 | - | 8.3 |
| Luís Eduardo Magalhães - BA | 2018/19 | 7.016 | 2.742 | 6.816 | 2.705 | 102.9 | 101.4 | 6.9 |
| Riachão das Neves - BA | 2018/19 | 6.951 | 2.781 | 6.537 | 2.577 | 106.3 | 107.9 | 11.9 |
| São Desidério - BA | 2018/19 | 8.400 | 3.392 | 9.501 | 3.885 | 88.4 | 87.3 | 7.9 |
| Uruçuí - PI | 2018/19 | 5.387 | 2.181 | 5.234 | 2.076 | 102.9 | 105.1 | 13.5 |
| Barbalha - CE | 2019 | 4.307 | 1.808 | 4.370 | 1.803 | 98.6 | 100.2 | 18.1 |
| Santo Antônio de Goiás - GO | 2018/19 | 5.346 | 2.123 | 5.184 | 2.069 | 103.1 | 102.6 | 9.9 |
| Sorriso - MT | 2019** | 5.279 | 2.199 | 6.048 | 2.559 | 87.3 | 85.9 | 11.2 |
| Campo Verde - MT | 2018/19** | 5.843 | 2.442 | 5.793 | 2.436 | 100.9 | 100.2 | 7.7 |
| Sapezal - MT | 2019** | 6.696 | 2.696 | 6.485 | 2.651 | 103.3 | 101.7 | 11.3 |
| Chapadão do Sul - MS | 2019** | 3.956 | 1.512 | 3.747 | 1.421 | 105.6 | 106.4 | 12.1 |
| Cambará - PR | 2018/19 | 2.378 | - | 1.853 | - | 128.3 | - | 24.1 |
| Palmas - TO | 2019 | 4.782 | - | 4.176 | - | 114.5 | - | 11.4 |
| Boa Vista - RR | 2019 | 2.273 | - | 2.201 | - | 103.3 | - | 12.8 |
| Mean | 5.667 | 2.579 | 5.187 | 2.383 | 111.4 | 109.5 | ||
