Morphological based screening and genetic diversity analysis of the local rice (Oryza sativa L.) landraces at the seedling stage for salinity tolerance

Eti, I.; Rasel, Md.; Hassan, Lutful; Ferdausi, Aleya

doi:10.18801/jbar.180118.185

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…2 A and B). Similar results were observed by Lang et al ( 2017 ) and Eti et al ( 2018 ), wherein greater root length was identified to be a promising trait with respect to salinity tolerance. Since Saltol QTL is associated with Na + /K + balance in the shoot tissues, the implicit mechanism of tolerance is attributed to Na + /K + homeostasis driven by OsHKT1 ;5 (Singh et al 2012 ).…”

Section: Discussionsupporting

confidence: 89%

DRR Dhan 58, a Seedling Stage Salinity Tolerant NIL of Improved Samba Mahsuri Shows Superior Performance in Multi-location Trials

Rekha

Kumar

Gokulan

et al. 2022

Rice

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Background Improved Samba Mahsuri (ISM) is an elite, high-yielding, bacterial blight resistant, fine-grained rice variety with low glycaemic index. It is highly sensitive to salt stress, particularly at seedling stage, which significantly reduces its yield potential in coastal areas. A salinity tolerant QTL, Saltol, associated with seedling stage tolerance was previously mapped on chromosome 1 (10.6–11.5 Mb) from the Indian landrace, Pokkali and is effective in different genetic backgrounds. The objective of this study was to enhance salinity tolerance of ISM by incorporating the Saltol QTL through marker-assisted backcross breeding using the breeding line, FL478 (Pokkali/IR29). Results Foreground selection was carried out at each generation using five Saltol-specific markers and three bacterial blight resistance genes, Xa21, xa13 and xa5. Background selection was conducted using 66 well distributed polymorphic SSR markers and at the BC3F2 generation, a single plant with maximum recurrent parent genome recovery (95.3%) was identified and advanced to the BC3F4 generation. Based on bacterial blight resistance, seedling stage salinity tolerance and resemblance to ISM, four advanced breeding lines were selected for testing in replicated experiments near Hyderabad, India. A promising near-isogenic line, DRR Dhan 58, was evaluated in multi-location trials-coastal salinity and it showed significant salinity tolerance, resistance to bacterial blight disease, high yield and excellent grain quality during the 2019 and 2020 trials. DRR Dhan 58 was 95.1% similar to ISM based on genotyping with the 90 K SNP chip. Whole genome resequencing analysis of Pokkali and FL478 which were salinity tolerant checks, ISM and DRR Dhan 58 showed a high degree of relatedness with respect to the candidate gene loci for Saltol and OsSKC1 (Shoot K+Concentration 1). Conclusion DRR Dhan 58, possessing Saltol and three bacterial blight resistance genes (Xa21, xa13 and xa5) in the genetic background of the Indian mega-variety of rice, Samba Mahsuri, was developed for potential cultivation in areas prone to seedling stage salinity, as well as areas with endemic bacterial blight disease. This entry had a 24% yield advantage over the recurrent parent ISM under coastal saline conditions in multi-location trials and was recently released for commercial cultivation in India.

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Section: Discussionsupporting

confidence: 89%

DRR Dhan 58, a Seedling Stage Salinity Tolerant NIL of Improved Samba Mahsuri Shows Superior Performance in Multi-location Trials

Rekha

Kumar

Gokulan

et al. 2022

Rice

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“…Gejala kerusakan visual yang ditemukan berupa ujung daun memutih, daun menggulung, dan daun kering kecokelatan. Kondisi kerusakan visual serupa pada padi yang mendapatkan cekaman salinitas juga dilaporkan pada hasil penelitian lain (Al-Amin et al, 2013;Mondal dan Borromeo, 2016;Eti et al, 2018), dengan genotipe toleran menunjukkan tanpa gejala kerusakan visual atau memiliki gejala kerusakan visual yang lebih ringan dibandingkan genotipe moderat dan genotipe peka. Berdasarkan evaluasi kerusakan bibit (Tabel 3), pembanding toleran Pokkali dan pembanding peka Inpara 4 memiliki skor masing-masing 3 dan 8.5.…”

Section: Hasil Dan Pembahasanunclassified

Respon Galur-galur Harapan Padi Sawah Dihaploid terhadap Salinitas pada Fase Bibit

Anindyajati

Purwoko

Dewi³

et al. 2021

J. Agron. Indonesia

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Tantangan pemulia padi ke depan bertambah seiring dengan terjadinya perubahan iklim yang menyebabkan peningkatan salinitas lahan pertanian. Salinitas dapat mengakibatkan penurunan pertumbuhan dan kehilangan hasil yang besar dalam produksi padi. Tujuan penelitian ini ialah mengevaluasi toleransi salinitas galur-galur harapan padi sawah doubled-haploid /dihaploid (DH) hasil kultur antera pada fase bibit. Penelitian dilaksanakan di rumah kaca dari bulan Desember 2018 sampai Januari 2019. Penelitian dilakukan secara hidroponik dan disusun berdasarkan split plot rancangan kelompok lengkap teracak dengan empat ulangan. Petak utama ialah konsentrasi NaCl (0 mM dan 120 mM) dan anak petak berupa genotipe padi yang terdiri atas 14 galur DH, 4 VUB, pembanding toleran (Pokkali), dan pembanding peka (Inpara 4). Evaluasi pertumbuhan bibit dan skoring kerusakan visual bibit dilakukan 14 hari sesudah pemberian NaCl. Hasil penelitian menunjukkan konsentrasi NaCl 120 mM menyebabkan penurunan tinggi bibit, panjang akar, jumlah daun, jumlah anakan, bobot basah tajuk, bobot basah akar, bobot kering tajuk, bobot kering akar, bobot basah biomassa, dan bobot kering biomassa. Penurunan tinggi bibit dapat dipertimbangkan sebagai karakter penting dalam penapisan toleransi salinitas pada fase bibit. Hasil skoring terhadap kerusakan visual menghasilkan 11 galur DH dan 2 VUB toleran serta 3 galur DH dan 2 VUB moderat toleran. Kata kunci: hidroponik, kultur antera, penapisan, toleransi

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“…Higher variation in SES occurred between rice genotypes under salinity tolerance [33]. Application of 7 and 12 EC stress showed greater variation (From highly tolerant to highly susceptible) in SES of 25 rice genotypes [34]. The data on root shoot ratio had negative trend with increasing salinity and tolerant genotypes recorded higher ratio than susceptible genotypes.…”

Section: Leaf Drying Score and Root Shoot Ratiomentioning

confidence: 99%

Physiological Evaluation of Different Rice Genotypes to Two Salinity Level during Seedling Stage under Hydroponic System

Lakshmi

Ravichandran

Arul

et al. 2020

IJPSS

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Hydroponics study was conducted to screen eight rice genotypes (CO 51, ADT 53, ADT 37, IR 64, CO 43, ASD 16, Pokkali; TRY 3) under salinity stress on early seedling stage. Two Saline treatments (75 and 100 mM NaCl) were given at 15 days old seedling; observations were recorded at 10 days after salt stress. Results showed that shoot length, root length, total fresh and dry weight, shoot and root fresh weight, shoot and root dry weight and root- shoot ratio were reduced under saline conditions compared to control. Na+ ion Concentration and Na+/ k+ ratio was higher in saline treatments than control. However, K+ ion absorption decreased with increasing salinity level. Electrolyte leakage and osmotic potential had increasing trend with increasing level of salinity. In this study, rice genotypes Pokkali, TRY 3 and CO 43 perform as tolerant; CO 51, ADT 53 and ASD 16 perform as moderately tolerant; ADT 37 is susceptible and IR 64 is highly susceptible. This type of study is required to develop salt tolerant genotypes at salt stress during seedling stage; to increase the growth and yield of rice there by satisfy the need of country’s requirement.

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Morphological based screening and genetic diversity analysis of the local rice (Oryza sativa L.) landraces at the seedling stage for salinity tolerance

Cited by 7 publications

References 13 publications

DRR Dhan 58, a Seedling Stage Salinity Tolerant NIL of Improved Samba Mahsuri Shows Superior Performance in Multi-location Trials

DRR Dhan 58, a Seedling Stage Salinity Tolerant NIL of Improved Samba Mahsuri Shows Superior Performance in Multi-location Trials

Respon Galur-galur Harapan Padi Sawah Dihaploid terhadap Salinitas pada Fase Bibit

Physiological Evaluation of Different Rice Genotypes to Two Salinity Level during Seedling Stage under Hydroponic System

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