Screening eighty traditional and improved rice genotypes in Sri Lanka for salinity tolerance at the seedling stage in Yoshida solution 

IF 0.4 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
H.A.P.A. Shyamalee, A. Ranawake
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Abstract

A total of eighty different rice genotypes consisting of fifty-three traditional rice accessions and twenty-seven improved rice varieties were evaluated for salinity tolerance. To identify the tolerant genotypes and the relationship between tolerance level with plant height and dry matter accumulation, the seedlings were subjected to electrical conductivity (EC) ~12 dSm-1 for ten and sixteen days separately at the seedling stage. The salinity tolerance of the seedlings was evaluated by standard evaluation scores (SES). Plant height, and total, shoot, and root-dry matter were evaluated in stressed and controlled plants. Rathuheenati4992 was highly tolerant at salinity stresses, and Heenati4618, Kaluwee3728, Mawee (5531, 3618), and Pokkali3573 were highly tolerant at the 10-day and tolerant at the 16-day salinity stress. Pokkali3881 was moderately tolerant at both stress conditions. Improved rice varieties At354 and Bg250 were highly tolerant at 10-day salinity stress and tolerant at 16-day salinity stress. Cultivation of highly susceptible improved rice varieties, Bg360, At306, At362, Ld368 At405, At402, Ld371, Bw272-6b, Ld365, and Bg352 must be avoided in salinized soils. There was no correlation between plant height and salinity tolerance (r = -0.381, α = 0.000), salinity tolerance and total dry matter (r = 0.325 α = 0.002), salinity tolerance and root dry matter (r = 0.294, α = 0.008), or salinity tolerance and shoot dry matter (r = 0.061, α = 0.594). Plant height or dry matter accumulation can be considered unreliable parameters for salinity tolerance screening since they differ with the genotype. The highly tolerant and tolerant genotypes must be further studied at different growth stages.
在吉田溶液中筛选斯里兰卡八十个传统和改良水稻基因型的苗期耐盐碱能力
对由 53 个传统水稻品种和 27 个改良水稻品种组成的 80 个不同水稻基因型进行了耐盐性评估。为了确定耐盐基因型以及耐盐水平与株高和干物质积累之间的关系,在秧苗阶段分别对秧苗进行为期十天和十六天的 ~12 dSm-1 电导率(EC)测试。秧苗的耐盐碱能力通过标准评价分数(SES)进行评估。对受压和受控植物的株高、总干物质、芽干物质和根干物质进行了评估。Rathuheenati4992 对盐分胁迫的耐受性很强,Heenati4618、Kaluwee3728、Mawee(5531、3618)和 Pokkali3573 对 10 天盐分胁迫的耐受性很强,对 16 天盐分胁迫的耐受性很强。Pokkali3881 对这两种胁迫条件的耐受性一般。改良水稻品种 At354 和 Bg250 对 10 天的盐分胁迫具有高度耐受性,对 16 天的盐分胁迫具有耐受性。必须避免在盐渍化土壤中种植高感性改良水稻品种 Bg360、At306、At362、Ld368 At405、At402、Ld371、Bw272-6b、Ld365 和 Bg352。植株高度与耐盐碱性(r = -0.381,α = 0.000)、耐盐碱性与总干物质(r = 0.325 α = 0.002)、耐盐碱性与根干物质(r = 0.294,α = 0.008)、耐盐碱性与芽干物质(r = 0.061,α = 0.594)之间没有相关性。由于植株高度或干物质积累随基因型的不同而不同,因此可将其视为不可靠的耐盐性筛选参数。必须在不同生长阶段进一步研究高耐盐性和耐盐性基因型。
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来源期刊
CiteScore
0.90
自引率
0.00%
发文量
57
审稿时长
>12 weeks
期刊介绍: The Journal of National Science Foundation of Sri Lanka (JNSF) publishes the results of research in Science and Technology. The journal is released four times a year, in March, June, September and December. This journal contains Research Articles, Reviews, Research Communications and Correspondences. Manuscripts submitted to the journal are accepted on the understanding that they will be reviewed prior to acceptance and that they have not been submitted for publication elsewhere.
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