干旱条件下战略种植马来西亚籼稻基因型的发芽性能和幼苗早期生长评估

IF 1.5 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Chilean Journal of Agricultural Research Pub Date : 2023-06-01 DOI:10.4067/s0718-58392023000300281
Fatematuz Zuhura Evamoni, Rosimah Nulit, Chee Kong Yap, Mohd Hafiz Ibrahim, Noorhazira Binti Sidek
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引用次数: 0

摘要

干旱是制约马来西亚水稻(Oryza sativa L.)生产的主要非生物因素。到目前为止,马来西亚农业研究与发展研究所(MARDI)已经发布了50多种籼稻基因型。然而,对其耐旱性的研究却很少。本研究旨在评价15个水稻基因型在聚乙二醇(PEG) 6000诱导的干旱胁迫下的萌发和早苗生长性能。PEG 6000采用4种渗透电位(0、-0.3、-0.6、-0.9 MPa)分别表示为对照、低、中、重度胁迫。测定种子发芽率、萌发指数、萌发能、发芽率、幼苗高度、幼苗活力I和II、幼苗鲜重和干重等指标。不同渗透胁迫下基因型间的研究参数差异较大。结果表明,在所有胁迫下,大多数水稻基因型的萌发和生长性状均明显下降,而MR211的下降幅度较小。多变量聚类将基因型分为5个不同的聚类,其中聚类V (MR220、MR269、MR253、MR297、MR303和MR284)包含6个基因型,在不同渗透势下萌发和生长较好,聚类IV (MR211和MR307)次之。集群II纳入了一个基因型MARDI WARNA98,其萌发和生长特性最小。主成分分析(PCA)表明,前两个成分对多样性的贡献最大,分别为81.8%和7.7%。因此,peg6000可作为水稻抗旱性判别和鉴定的有效工具。
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Assessment of germination performance and early seedling growth of Malaysian indica rice genotypes under drought conditions for strategic cropping during water scarcity
Drought is a major abiotic constraint on rice (Oryza sativa L.) production in Malaysia. Malaysian Agricultural Research and Development Institute (MARDI) has released more than 50 indica rice genotypes so far. However, little has been studied about their drought tolerance. The study aimed to evaluate the germination and early seedling growth performances of 15 rice genotypes under polyethylene glycol (PEG) 6000-induced drought stresses. Four osmotic potentials of PEG 6000 (0, -0.3, -0.6, -0.9 MPa) were used in the study denoted as control, low, moderate and severe stresses respectively. Data on seed germination percentage, germination index, germination energy, germination rate, seedling height, seedling vigor I and II, fresh and dry weight of seedlings were measured. Studied parameters varied greatly among genotypes with different osmotic stresses. The findings suggested most of the rice genotypes showed an apparent reduction in germination and growth traits, while MR211 showed less reduction under all of the stresses. The Multivariate clustering grouped genotypes into five different clusters, where cluster V (MR220, MR269, MR253, MR297, MR303 and MR284) incorporated six genotypes showed better germination and growth under different osmotic potentials, followed by cluster IV (MR211 and MR307). Cluster II incorporated one genotype MARDI WARNA98 which had minimal germination and growth attributes. Principal component analysis (PCA) was performed to identify the maximum contributing variables for diversity, revealed maximum variation by first two components (81.8% and 7.7%) respectively. Therefore, PEG 6000 can be used as an efficient tool for discrimination and identification of drought tolerance in rice.
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来源期刊
Chilean Journal of Agricultural Research
Chilean Journal of Agricultural Research AGRICULTURE, MULTIDISCIPLINARY-AGRONOMY
CiteScore
3.10
自引率
11.80%
发文量
60
审稿时长
6-12 weeks
期刊介绍: ChileanJAR publishes original Research Articles, Scientific Notes and Reviews of agriculture, multidisciplinary and agronomy: plant production, plant protection, genetic resources and biotechnology, water management, soil sciences, environment, agricultural economics, and animal production (focused in ruminant feeding). The editorial process is a double-blind peer reviewing, Editorial Office checks format, composition, and completeness, which is a requirement to continue the editorial process. Editorial Committee and Reviewers evaluate relevance and scientific merit of manuscript.
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