Assessment of salt tolerance potential at the germination and seedling stages in pigeonpea (Cajanus cajan L.)

IF 1 4区 生物学 Q3 PLANT SCIENCES
R. Joshi, N. Ramawat, R. P. Sah, Anita Gogia, A. Talukdar, Shraddha Sharma, A. Kumar, R. Raje, A. Patil, Durgesh Kumar
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引用次数: 0

Abstract

Identification of salt-tolerant genotypes and their subsequent utilization in producing salt tolerant varieties would be the most appropriate and cost-effective strategy for improving the yield of pigeonpea (Cajanus cajan L.) in salt-affected areas of the country. The present study assessed fifty diverse pigeonpea genotypes for their responses to salt (NaCl) concentrations of 60, 80 and 100 mM at seed germination and seedling stage (21-days-old). The tested genotypes were assessed for their changes in 11 morpho-physiological traits under salt stress and the phenotypic scores of the genotypes were analyzed statistically. Statistically, significant variations were observed among the genotypes for all the morpho-physiological traits under study including the germination percentage and seedling survivability. The genotypic and phenotypic correlation among the traits and the Principal Component Analysis (PCA) revealed that the seedling stage of the crop and 80 mM Nacl concentration are optimum for identifying pigeonpea genotypes tolerant to salt stress under controlled conditions. Out of the 50 genotypes, 10, namely, BDN-708, AKTM 16-41, AKTE 16-09, JKM-7, TV-1, BDN-716, PT 0607-5-1, JKM-189, Phule Rajeshwary, BDN-711 and AKTE-12-04 were found to be tolerant to salt stress and rest were sensitive. The salt tolerant genotypes clustered together under UPGMA, indicating their genetic relatedness for the trait. The salt tolerant genotypes identified in this study would be useful in the development of a mapping population for mapping the salt stress, and breeding for high-yielding pigeonpea varieties with tolerance to salt stress.
木豆(Cajanus cajan L.)发芽和幼苗期耐盐性的评价
鉴定耐盐基因型并随后将其用于生产耐盐品种将是在该国受盐影响地区提高木豆产量的最合适和最具成本效益的策略。本研究评估了50种不同基因型的木豆在种子萌发和幼苗期(21天龄)对60、80和100mM盐(NaCl)浓度的反应。对受试基因型在盐胁迫下11个形态生理性状的变化进行了评估,并对基因型的表型得分进行了统计分析。从统计数据来看,在所研究的所有形态生理特征(包括发芽率和幼苗存活率)的基因型之间都存在显著差异。性状之间的基因型和表型相关性以及主成分分析(PCA)表明,在受控条件下,作物的苗期和80mM Nacl浓度是鉴定耐盐性木豆基因型的最佳条件。在50个基因型中,BDN-708、AKTM 16-41、AKTE 16-09、JKM-7、TV-1、BDN-716、PT 0607-1-1、JKM-189、Phule Rajeshwary、BDN-711和AKTE-12-04等10个基因型对盐胁迫具有耐受性,其余均敏感。耐盐基因型在UPGMA下聚集在一起,表明它们与该性状的遗传相关性。本研究中确定的耐盐基因型将有助于开发用于绘制盐胁迫图谱的作图群体,以及选育具有耐盐胁迫性的高产木豆品种。
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来源期刊
CiteScore
1.80
自引率
10.00%
发文量
0
审稿时长
6-12 weeks
期刊介绍: Advance the cause of genetics and plant breeding and to encourage and promote study and research in these disciplines in the service of agriculture; to disseminate the knowledge of genetics and plant breeding; provide facilities for association and conference among students of genetics and plant breeding and for encouragement of close relationship between them and those in the related sciences; advocate policies in the interest of the nation in the field of genetics and plant breeding, and facilitate international cooperation in the field of genetics and plant breeding.
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