Identification and evaluation of salt tolerance of rice recombinant inbred lines at bud and seedling stages

doi:10.6048/j.issn.1001-4330.2023.05.001

Xinjiang Agricultural Sciences ›› 2023, Vol. 60 ›› Issue (5): 1041-1049.DOI: 10.6048/j.issn.1001-4330.2023.05.001

• Special volume for green, yield increasing, quality improving and eficiencyimproving technologies for major grain crops in Xinjiang • Previous Articles Next Articles

Identification and evaluation of salt tolerance of rice recombinant inbred lines at bud and seedling stages

ZHANG Yanhong¹(), HOU Tianyu¹, BA Yinhua¹, ZHAO Caiyue¹, LYU Yuping², Buhalikeimu Abunzi¹, ZHAO Zhiqiang¹, LI Dong², DU Xiaojing², YUAN Jie¹, WANG Fengbin²()

1. The State Key Laboratory of Genetic Improvement and Germplasm Innovation of Crop Resistance in Arid Desert Regions (Preparation)/Xinjiang Key Laboratory of Crop Biotechnology/Institute of Nuclear Technology and Biotechnology, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China
2. Key Laboratory of Oasis-Desert Crop Physiology Ecology and Cultivation of Agricultural Ministry of Agriculture and Rural Affairs/Institute of Food Crops, Xinjiang Academy of Agricultural Sciences, Urumqi 830091, China

Received:2022-09-05 Online:2023-05-20 Published:2023-05-22
Correspondence author: WANG Fengbin (1968-), male, born in Jiangxi Province, master degree, researcher, engaged in rice genetic breeding and cultivation technology, (E-mail)xjnkywfb@163.com
Supported by:
Key R & D Program Project of Xinjiang Uygur Autonomous Region(2021B02002-3);Key S &T Project of Xinjiang Autonomous Region(2022A03004-3)

水稻重组自交系群体芽期和苗期耐盐性鉴定与评价

张燕红¹(), 侯天钰¹, 巴音花¹, 赵彩月¹, 吕玉平², 布哈丽且木·阿不力孜¹, 赵志强¹, 李冬², 杜孝敬², 袁杰¹, 王奉斌²()

1.新疆农业科学院核技术生物技术研究所/干旱荒漠区作物抗逆遗传改良与种质创新国家重点实验室(筹)/新疆农作物生物技术重点实验室,乌鲁木齐 830091
2.新疆农业科学院粮食作物研究所/农业农村部荒漠绿洲作物生理生态与耕作重点实验室,乌鲁木齐 830091

通讯作者: 王奉斌(1968-),男,江西人,研究员,硕士,研究方向为水稻遗传育种及栽培,(E-mail)xjnkywfb@163.com
作者简介:张燕红(1982-),女,甘肃武威人,副研究员,研究方向为水稻遗传育种,(E-mail)zhangyanhong9527@163.com
基金资助:
新疆维吾尔自治区重点研发项目(2021B02002-3);新疆维吾尔自治区重大科技专项(2022A03004-3)

Abstract

Abstract:

【Objective】 Which seriously restricts the production and development of rice, so it is of great significance to identify the salt tolerance of rice germplasm resources at bud and seedling stages.The results have provided germplasm resources and reference for further digging salt-tolerant rice germplasm and breeding new varieties.【Methods】 A total of 219 stable recombinant inbred lines were used as experimental materials to identify and evaluate the salt tolerance of rice at bud stage and seedling stage using 1.2% NaCl solution and 0.7% NaCl solution, respectively.【Result】 The results showed that the germination potential and germination rate decreased significantly after the treatment with 1.2% NaCl, and 4 salt-tolerant materials and 6 sensitive materials were screened.The germination potential, germination rate, bud length and root length of salt-tolerant materials decreased slowly, while the germination potential, germination rate, bud length and root length of sensitive materials decreased significantly.After 0.7% NaCl treatment at seedling stage, the survival rate of population materials decreased significantly.The comparison of phenotypes between salt-tolerant materials and sensitive materials showed that the plant height and survival rate of salt-tolerant materials decreased but did not reach a significant level, while the plant height and survival rate of sensitive materials decreased significantly, and the inhibition degree of salt-tolerant materials was less than that of sensitive materials.【Conclusion】 The relative germination potential, relative germination rate and survival rate of 219 materials decreased significantly after salt stress at bud stage.The salinity tolerance of salt-tolerant materials is different from that of sensitive materials.The salinity stress of salt-tolerant materials is lower than that of sensitive materials.Eighteen materials with strong salt tolerance at budding stage are screened and seedlings of strong salt tolerance material 2 are also obtained.

Key words: rice; bud stage; seedling stage; salt tolerance; evaluation

摘要：

【目的】鉴定水稻种质资源芽期和苗期耐盐性,筛选耐盐性优良的种质资源,为挖掘水稻耐盐种质和培育耐盐新品种提供种质资源和参考依据。【方法】采用前期构建稳定的219份重组自交系为试验材料,在水稻的芽期和苗期分别利用1.2% NaCl和0.7% NaCl溶液鉴定和评价耐盐性。【结果】芽期用1.2% NaCl处理后发芽势和发芽率显著降低,筛选出4份耐盐材料和6份敏感材料。耐盐材料的发芽势、发芽率、芽长、根长下降缓慢,敏感材料发芽势、发芽率、芽长、根长显著下降。苗期用0.7% NaCl处理后,群体材料的存活率显著降低;耐盐材料和敏感材料的表型比较发现,耐盐材料株高和存活率有所下降但未达到显著水平,敏感材料株高和存活率显著下降,耐盐材料相比敏感材料受抑制程度较轻。【结论】219份材料的芽期受到盐胁迫后,相对发芽势、相对发芽率和存活率显著降低;耐盐材料和敏感材料的耐盐性不同,耐盐材料受盐胁迫的程度低于敏感材料;筛选出芽期耐盐性强材料18份;苗期耐盐性强材料2份。

关键词: 水稻, 芽期, 苗期, 耐盐性, 评价

CLC Number:

S511

ZHANG Yanhong, HOU Tianyu, BA Yinhua, ZHAO Caiyue, LYU Yuping, Buhalikeimu Abunzi, ZHAO Zhiqiang, LI Dong, DU Xiaojing, YUAN Jie, WANG Fengbin. Identification and evaluation of salt tolerance of rice recombinant inbred lines at bud and seedling stages[J]. Xinjiang Agricultural Sciences, 2023, 60(5): 1041-1049.

张燕红, 侯天钰, 巴音花, 赵彩月, 吕玉平, 布哈丽且木·阿不力孜, 赵志强, 李冬, 杜孝敬, 袁杰, 王奉斌. 水稻重组自交系群体芽期和苗期耐盐性鉴定与评价[J]. 新疆农业科学, 2023, 60(5): 1041-1049.

Figures/Tables 11

Tab.1 Salt tolerance evaluation criteria of rice during germination

评价级别 Rating	耐盐指数 Salt tolerant coefficient	耐盐性 Salt tolerant ability
1	≤20	高耐
3	20.1~40.0	耐盐
5	40.1~60.0	中
7	60.1~80.0	敏感
9	80.1~100.0	高敏

Tab.2 Salt tolerance evaluation criteria at seedling stage of rice

评价级别 Rating	盐害症状 Symptoms of salt damage	耐盐性 Salt tolerant ability
1	生长分蘖基本正常,叶片无受害症状	高耐
3	生长分蘖近正常,但叶尖或上部叶片1 /2发白或卷曲;或生长分蘖受抑制,有些叶片卷曲	耐盐
5	生长分蘖严重抑制,多数叶片卷曲, 仅少数叶片伸长	中
7	生长分蘖停止,多数叶片干枯	敏感
9	植株死亡或接近死亡	高敏

Fig.1 Comparison of germination potential and germination rate of population materials under different treatments Note: Different lowercase letters indicate significant differences in the same material under different treatments (P<0.05), the same as below

Tab.3 Seedling stage traits of 219 rice population materials under salt stress

性状 Trait	处理 Treatment	平均值 Mean	最大值 Max	最小值 Min	极差 Range	标准差 SD	变异系数 CV(%)
发芽势 Germination potential (%)	CK	87.9	99.2	31.4	67.8	10.5	11.9
发芽势 Germination potential (%)	NaCl	4.5	66.3	0.0	66.3	7.5	169.2
相对发芽势 Relative germination potential(%)		4.9	68.5	0.0	68.5	8.0	163.8
发芽率 Germination rate (%)	CK	96.8	99.4	82.2	17.2	3.1	3.2
发芽率 Germination rate (%)	NaCl	27.4	92.2	0.0	92.2	19.4	70.8
相对发芽率 Relative germination rate(%)		28.2	93.1	0.0	93.1	19.8	70.3
发芽势相对盐害率 Germination potential relative salt damage rate(%)		73.9	100.0	32.0	68.0	8.0	16.7
发芽率相对盐害率 Germination rate relative to salt damage rate(%)		48.1	98.3	21.3	78.7	18.2	24.7

Fig.2 Comparison of seedling survival rate of population materials under different treatments

Fig.3 Distribution of salt tolerance levels at bud and seedling stages of rice population Note: a:the bud stage, b:the seedling stage

Fig.4 Comparison of growth conditions of salt-tolerant and sensitive materials under different treatments Note:A: salt-resistant material, B: sensitive material, the same as below

Fig.5 Comparison of germination potential and germination rate of different salt-tolerant materials under salt stress Note: The same uppercase letter means significant difference between different materials under the same treatment, and different lowercase letter means significant difference between the same materials under different treatment (P<0.05), the same as below

Fig.6 Effect of different treatments on sprout growth of salt-tolerant and sensitive materials

Fig.7 Salt-tolerant and sensitive materials under 0.7% NaCl stress

Fig.8 Changes of plant height and survival rate of salt-tolerant and sensitive materials under different treatments

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Identification and evaluation of salt tolerance of rice recombinant inbred lines at bud and seedling stages

水稻重组自交系群体芽期和苗期耐盐性鉴定与评价

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