绘制水稻品系耐盐策略相关表型参数

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY
Daniel Amorim Vieira, M. A. Toro‐Herrera, J. Pennacchi, A. Mendonça, P. Marchiori, F. B. S. Botelho, J. P. R. A. D. Barbosa
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引用次数: 0

摘要

当前位置盐度被认为是主要的非生物胁迫之一,它导致许多作物(如水稻)的产量下降。考虑到水稻作为主要粮食作物的重要性,全球土壤盐碱化的普遍模式以及作物对盐碱地的敏感性,本研究的目的是评估旱稻品系的敏感性/耐受性。这项工作中使用的旱稻品系来自拉夫拉斯联邦大学遗传改良计划。试验在温室内进行,采用区组设计和因子设计,设10个品系,在基质上分别施用0、3、15和45 mmol·L -1 NaCl处理。对出苗率、幼苗成活率、生长和结构、生物量分配、气体交换和生产力等参数进行了评价。盐度水平影响出苗率和成活率,特别是在NaCl水平最高时,L1、L4和L5系的成活率低于60%。这些品系被排除在试验之外,其他7个品系一直进行到作物周期结束。以单株粒重(GWP)作为耐盐性指标,L6、L7和L8系在增加NaCl处理下表现突出。随着NaCl剂量的增加,L6的GWP最高,而L7和L8的降低幅度较小。这3个品系可作为进一步研究NaCl对水稻生产影响的参考材料。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Mapping phenotypic parameters linked to salt stress tolerance strategies in rice lines
: Salinity is recognized as one of the main abiotic stresses, causing declines in the productivity of many crops, such as rice. Considering the importance of rice as a staple food crop, the generalized pattern of salinization in soils around the globe and the sensitivity of the crop to saline soils, the aim of this study was to evaluate the sensitivity / tolerance of upland rice lines. The upland rice lines used in this work were obtained from the Genetic Improvement Program of the Universidade Federal de Lavras. The experiment was carried out in a greenhouse, with a block design and factorial scheme, with 10 lines and four NaCl treatments (0, 3, 15 and 45 mmol·L -1 ) on the substrate. Parameters related to the emergence rate, seedling survival rate, growth and architecture, biomass allocation, gas exchange and productivity were evaluated. Salinity levels influenced the emergence and survival rates, especially at the highest levels of NaCl, with lines L1, L4 and L5 showing survival below 60%. These lines were excluded from the experiment, and the other seven lines were carried out until the end of the crop cycle. Grain weight per plant (GWP) was used as an indicator of greater tolerance to salinity, and lines L6, L7 and L8 showed outstanding performance under treatments with increased NaCl. L6 had the highest GWP, while L7 and L8 had less pronounced decreases with increasing NaCl doses. These three lines may be recommended for further studies about the impacts of NaCl on rice production.
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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