Santos Talles de Oliveira, de Oliveira Fábio Tomaz, Amaral Junior Antônio Teixeira do, de Almeida Filho Janeo Eustáquio, Bispo Rosimeire Barboza, de Freitas Marta Simone Mendonça, Amaral José Francisco Teixeira do, Kamphorst Samuel Henrique, de Lima Valter Jário, Viana Flávia Nicácio, Pena Guilherme Ferreira, Santos Pedro Henrique Araújo Diniz, Bernado Wallace de Paula, Pereira Messias Gonzaga, Oliveira Jurandi Gonçalves de, Bressan-Smith Ricardo Enrique, Trindade Roberto Dos Santos
Plant Genetic Breeding Laboratory, Center for Agricultural Sciences and Technologies (CCTA), Universidade Estadual do Norte Fluminense Darcy Ribeiro (UENF), Campos dos Goytacazes 28013-602, RJ, Brazil.
Bayer, Estrada da Invernadinha, 2000, Coxilha 99145-000, RS, Brazil.
Plants (Basel). 2022 Aug 26;11(17):2216. doi: 10.3390/plants11172216.
Phosphorus is a non-renewable natural resource that will run out of reserves in the upcoming decades, making it essential to understanding the inheritance of nutrient use efficiency for selecting superior genotypes. This study investigated the additive and non-additive effects of commercially relevant traits for the popcorn crop (grain yield-GY, popping expansion-PE, and expanded popcorn volume per hectare-PV) in different conditions of phosphorus (P) availability in two locations in Rio de Janeiro State, Brazil. Six S lines previously selected for P use-L59, L70, and P7, efficient and responsive; and L54, L75, and L80, inefficient and non-responsive-were used as testers in crosses with 15 progenies from the fifth cycle of intrapopulation recurrent selection of UENF-14, with adaptation to the North and Northwest regions of Rio de Janeiro State. Using the Griffing diallel analysis, P use efficiency was predominantly additive in the expression of PE, and non-additive effects were prominent for GY and PV. For obtaining genotypes that are efficient for phosphorus use, it is recommended that heterosis with parents that provide additive gene accumulation for PE be explored.
磷是一种不可再生的自然资源，在未来几十年内将耗尽储量，因此了解养分利用效率的遗传特性对于选择优良基因型至关重要。本研究调查了巴西里约热内卢州两个地点在不同磷（P）有效性条件下，爆米花作物商业相关性状（籽粒产量-GY、爆裂膨胀-PE和每公顷膨胀爆米花体积-PV）的加性和非加性效应。六个先前选择的磷利用S系——L59、L70和P7，高效且响应性好；以及L54、L75和L80，低效且无响应性——与来自UENF-14群体内轮回选择第五代的15个后代进行杂交，这些后代适应里约热内卢州的北部和西北部地区。采用格里芬双列杂交分析，磷利用效率在PE的表达中主要表现为加性效应，而对于GY和PV，非加性效应较为突出。为了获得磷利用高效的基因型，建议探索与能为PE提供加性基因积累的亲本的杂种优势。
