Caracterização e avaliação da cultivar pv1 alagoana rr de soja para registro e proteção no mapa

Abstract

Brazil is the world's largest producer of soybeans and still has great potential to expand its cultivation, especially in the new agricultural frontiers of the North and Northeast regions. Latitude and photoperiod influence crop phenology, which allows genetic improvement to explore genotypic variability and select genotypes that are better adapted to new production areas. The state of Alagoas, with its soil and climate characteristics, has potential for soybean cultivation. In this context, the company PV Sementes Ltda - EPP has developed soybean and corn varieties adapted to the local conditions of the State. The objective of this work was to evaluate the new soybean cultivar PV1 Alagoana RR, through Distinctness, Uniformity and Stability (DUS), Cultivation and Use Value (VCU) and Relative Maturity Groups (GMR) tests in the Coastal Tablelands region of Alagoas. The DUS experiment was developed in 2020 and 2021 in the municipality of Paripueira. The VCU experiments were conducted in the municipalities of Paripueira and Tanque d’Arca, in 2020 and 2021. The GMR experiments were conducted in the municipalities of Paripueira (2020 and 2021), Rio Largo (2020) and Tanque d’Arca (2020). In the DUS experiment, a cocooned block design was used, comparing the new cultivar PV1 Alagoana RR with the cultivars TMG 1180 RR, TMG 2185 IPRO, TMG 2381 IPRO, FTR 3190 IPRO, BRS 8781 RR, Brasmax Foco IPRO and Brasmax Ultra IPRO in a randomized block design, with three replications. For the VCU experiment, the new cultivar PV1 Alagoana RR was compared with the cultivars TMG 1180 RR, TMG 2185 IPRO, TMG 2381 IPRO, FTR 3190 IPRO, BRS 8781 RR, Brasmax Domínio IPRO and Brasmax Extra IPRO, in a randomized block design with three replications. Regarding the GMR experiment, the new cultivar PV1 Alagoano RR was evaluated in a randomized block design, with two replications, with the cultivars Brasmax Ultra IPRO, TMG 1180 RR, TMG 2185 IPRO and FTR 3190 IPRO. In relation to the DUS experiment in 2020 and 2021, the cultivars FTR 3190 IPRO, BRS 8781 RR and PV1 Alagoana RR have an average plant vegetative cycle. The cultivars TMG 2185 IPRO, FTR 3190 IPRO and PV1 Alagoana RR presented the highest grain yields; in 2021, the cultivars PV1 Alagoana RR, TMG 2381 IPRO and FTR 3190 IPRO presented the highest yields, with 5,122 kg/ha, 5,335.3 kg/ha and 5,589.3 kg/ha, respectively. In the VCU experiment, in the municipality of Paripueira, in 2020 and 2021, the cultivars did not show dehiscence of the threshing pods. The cultivars FTR 3190 IPRO, Brasmax Extrema IPRO and Brasmax Domínio IPRO presented the highest grain yields (2020), in 2021, the cultivars TMG 2381 IPRO, FTR 3190 IPRO, BRS 8781 RR, Brasmax Domínio IPRO and PV1 Alagoana RR stood out with the highest (P < 0.01) yields. In the municipality of Tanque d’Arca, the Brasmax Extrema IPRO cultivar presented the best grain yield (2020), in 2021, the Brasmax Extrema IPRO, Brasmax Domínio IPRO and PV1 Alagoana RR cultivars stood out. The PV1 Alagoana RR cultivar presents GMR 9.1, being indicated for the Coastal Tablelands region of Alagoas. Keywords: Glycine max L. Merrill; performance; yield; northeast.