Leite Jhean Torres, Amaral Junior Antônio Teixeira do, Kamphorst Samuel Henrique, Lima Valter Jário de, Santos Junior Divino Rosa Dos, Alves Uéliton Oliveira, Azeredo Valdinei Cruz, Pereira Jacymara Lopes, Bispo Rosimeire Barboza, Schmidt Katia Fabiane Medeiros, Viana Flávia Nicácio, Viana Alexandre Pio, Vieira Henrique Duarte, Ramos Helaine Christine Cancela, Ribeiro Rodrigo Moreira, Campostrini Eliemar
Laboratory of Plant Breeding, Center of Agricultural Science and Technology, Darcy Ribeiro State University of Northern Rio de Janeiro, Av. Alberto Lamego, 2000, Campos dos Goytacazes 28013-602, RJ, Brazil.
Plants (Basel). 2022 Aug 31;11(17):2275. doi: 10.3390/plants11172275.
The search for productive germplasm adapted to adverse conditions is an important action to mitigate the harmful effects of climate change. The aim was to identify the yield potential of 50 popcorn inbred lines grown in field conditions, in two crop seasons (CS), and under contrasting water conditions (WC). Morphoagronomic, physiological, and root system traits were evaluated. Joint and individual analyses of variance were performed, in addition to the multivariate GT bip-lot analysis. Expressive reductions between WC were observed in 100-grain weight (100 GW), popping expansion (PE), grain yield (GY), expanded popcorn volume per ha (EPV), row number per ear (RNE), plant height (PH), relative chlorophyll content (SPAD), and nitrogen balance index (NBI). It was found that the SPAD, 100 GW, GY, PE, and grain number per ear (GNE) traits had the most significant impact on the selection of genotypes. Regardless of WC and CS, the ideal lines were L294 and L688 for PE; L691 and L480 for GY; and L291 and L292 for both traits. SPAD, 100 GW, and GNE can contribute to the indirect selection. Our work contributes to understanding the damage caused by drought and the integration of traits for the indirect selection of drought-tolerant popcorn genotypes.
寻找适应不利条件的高产种质是减轻气候变化有害影响的一项重要举措。目的是确定50个爆米花自交系在田间条件下、两个作物季节（CS）以及不同水分条件（WC）下的产量潜力。对形态农艺、生理和根系性状进行了评估。除了多变量GT双区分析外，还进行了联合和单独的方差分析。在100粒重（100 GW）、爆花膨胀率（PE）、籽粒产量（GY）、每公顷膨胀爆米花体积（EPV）、每穗行数（RNE）、株高（PH）、相对叶绿素含量（SPAD）和氮平衡指数（NBI）方面，观察到不同水分条件之间有明显降低。发现SPAD、100 GW、GY、PE和每穗粒数（GNE）性状对基因型选择的影响最为显著。无论水分条件和作物季节如何，对于PE来说，理想的品系是L294和L688；对于GY来说，是L691和L480；对于这两个性状来说，是L291和L292。SPAD、100 GW和GNE有助于间接选择。我们的工作有助于理解干旱造成的损害以及整合性状以间接选择耐旱爆米花基因型。
