巴西南部两种不同环境下百喜草杂交种牧草积累

Marlon Risso Barbosa, E. A. Da Motta, J. Machado, Karine Cristina Kryck, I. F. Conterato, R. Weiler, M. Dall’Agnol, C. Simioni
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引用次数: 3

摘要

巴西南部的原生草原多年来一直维持着畜牧业;然而,放牧面积的减少导致了牧草物种遗传多样性的丧失。开发适应不同环境的牧草品种,将有助于形成新的栽培牧场或恢复退化地区。本研究旨在评价百喜草(P. notatum fl gge)种内杂交后代在两个不同环境下(中部和坎潘哈地区)的牧草积累情况,以评价其农艺价值。结果表明,各品种主要性状(叶干质量、茎干质量、花序干质量、总干质量、叶茎比、株高和分蘖种群密度)均存在变异。在南埃尔多拉多市,所有杂交种的牧草产量都高于“Pensacola”品种,在奥加布里埃尔市,大多数杂交种的牧草产量也高于“Pensacola”品种。饲料中叶片产量与总干质量相关(84%),表明对饲料质量的基因型选择也选择了叶片产量。选择的杂交种应指出,为新的评估步骤,在拟南芥育种计划。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Herbage accumulation of bahiagrass hybrids in two different environments in southern Brazil
The native grasslands of southern Brazil have sustained livestock farming for many years; however, decline in pasture areas has led to the loss of genetic diversity of forage species. The development of forage grass cultivars adapted to different environments, will contribute to forming new cultivated pastures or recovering degraded areas. The aim of this study was to assess the herbage accumulation of selected intraspecific hybrid progenies of bahiagrass (P. notatum Flügge) in two different environments (Depressão Central and Campanha region) to estimate their agronomic value. The results indicated variability for the main forage traits studied (leaf dry mass, stem dry mass, inflorescence dry mass, total dry mass, leaf: stem ratio, plant height and population density of tillers). All the hybrids producing more forage mass than the ‘Pensacola’ cultivar in the municipality of Eldorado do Sul and the majority also superior in the municipality of São Gabriel. The production of leaves in the forage was correlated with total dry mass (84%), suggesting that genotype selection for forage mass also selected for production of leaves. The selected hybrids should be indicated for new steps of assessment within the P. notatum breeding program.
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