Indian Agricultural Statistics Research Institute

About: Indian Agricultural Statistics Research Institute is a facility organization based out in New Delhi, India. It is known for research contribution in the topics: Population & Small area estimation. The organization has 454 authors who have published 870 publications receiving 7987 citations.

Drought responsiveness in black pepper (Piper nigrum L.): genes associated and development of a web-genomic resource.

Abstract: Black pepper (Piper nigrum L.; 2n= 52; Piperaceae), the king of spices, is a perennial, trailing woody flowering vine and has global importance with widespread dietary, medicinal, and preservative uses. It is an economically-important germplasm cultivated for its fruit and the major cash crop in >30 tropical countries. Crop production is mainly affected by drought stress. The present study deals with the candidate gene identification from drought-affected black pepper leaf transcriptome generated by Illumina Hiseq2000. It also aims to mine putative molecular markers (namely SSRs, SNPs and InDels) and generate primers for them. The identification of transcription factors and pathways involved in drought tolerance is also reported here. De novo transcriptome assembly was performed with trinity assembler. In total, 4914 differential expressed genes, 2110 transcriptional factors, 786 domains and 1137 families, 20124 putative SSR markers and 259236 variants were identified. At2g30105 (unidentified gene containing leucine-rich repeats and ubiquitin-like domain), serine threonine protein kinase, Mitogen-activated protein kinase, NBS-LRR, Myeloblastosis related proteins, Basic helix-loop-helix are all found upregulated and are reported to be associated with plant tolerance against drought condition. All these information are catalogued in the Black Pepper Drought Transcriptome Database (BPDRTDb), freely accessible for academic use at http://webtom.cabgrid.res.in/bpdrtdb/. This database is a good foundation for the genetic improvement of pepper plants, breeding programmes and mapping population of this crop. Putative markers can also be a reliable genomic resource to develop drought-tolerant variety for better black pepper productivity. This article is protected by copyright. All rights reserved.

Response of wheat cultivars to foliar potassium fertilization under irrigated saline environment

Abstract: A field experiment with split-split plot design (SSPD) was conducted to study the response of two winter wheat (Triticumaestivum L.) cultivars (viz. salt tolerant cultivar KRL-1-4 and salt non-tolerant cultivar HD-2894) under saline irrigation regimes with and without foliar potassium fertilization on growth and grain yield of wheat during rabi 2011-12 and 2012-13. Potassium in the ratio of K+: Na+ (1: 10) was applied as foliar application during the heading stage of the crop. Results showed that the grain yield of KRL-1-4 and HD-2894 cultivars with foliar potassium fertilization at the heading stage increased by 6.5 to 22% and 3 to 15% during rabi 2011-2012, respectively under different saline irrigation regimes as compared to the control. Moreover, the results of rabi 2012-13 showed an increase in grain yield ranging from 4.5 to 20% for KRL-1-4 as compared to the control. Statistical analysis of grain yield parameter showed that the foliar potassium application in both varieties resulted in significant yield difference at 0.05 probability level as compared to the non-foliar application. Overall, it was observed that the foliar potassium fertilization increased the grain yield of both wheat cultivars, while the salt tolerant cultivar performed better than the salt non-tolerant cultivar under irrigated saline regimes.

Quality matrix reveals the potential of Chak-hao as a nutritional supplement: a comparative study of matrix components, antioxidants and physicochemical attributes

Abstract: In the current trend of increased health consciousness in response to increased incidence of lifestyle disorders, functional foods, and nutritional supplements got immense acceptance globally. Whole grain foods rich in functional bio-actives being a better substitute for supplements, there is an emerged interest in exploring potential candidates like pigmented rice. The present study thus aims to evaluate the natural variability in matrix composition owing nutritional and antioxidant potential of pigmented niche rice varieties like Matta (red) and Chak-hao (black) compared to non-pigmented (NJ 72 and PB 1509). Comprehensive NQM developed indicated that Chak-hao, geographical indication (GI) rice has stout nutritional makeup in terms of phenolics (2.5 mg/g GAE), anthocyanins (0.65 g/kg), proanthocyanidins (54 mg/100 g), antioxidant activity (36 µmol TE/g) and resistant starch (4.13%) compared to Matta. The content of high-quality fatty acids like oleic (38.8%), linoleic (29%), and anthocyanin forms like cyanidin-3-glucoside (C3G)- 304 mg/Kg, delphinidin-3-glucoside (D3G)- 220 mg/Kg and peonidin-3-glucoside (P3G)- 120 mg/Kg was also most expressive in the black pigmented rice Chak-hao. Highly significant (p < 0.05) antioxidant activity and positive correlation with total phenolics, anthocyanins and proanthocyanidins content were most evident in pigmented varieties. Physicochemical attributes endorsing cooking time, water uptake ratio, grain elongation ratio, gruel solid loss and swelling ratio varied between 15–35 min, 2.17–3.2, 1.5–2.3, 0.28–1.25 and 1.75–2.66 respectively. The correlation between nutritional attributes endorsing antioxidant potential being strongly positive and most significant for Chak-hao, it could be the stellar addition for functional food industry as a nutritional supplement for addressing the ever-increasing pandemics like diabetes, obesity and other chronic diseases.

Response of combined abiotic stresses on maize (Zea mays L.) inbred lines and interaction among various stresses.

Abstract: In tropics, maize is largely grown as rain fed crop in marginal areas often faces drought and waterlogging simultaneously in same season that critically affects plant growth and development. The aim of the research was to study the response of combined abiotic stresses and the interaction among various stresses on maize inbred plants. In the present study, eighty maize (Zea mays L.) inbred lines were screened, for multiple abiotic stresses at the vegetative stage. All the traits, observed were severely affected, in drought x low-N stress compare to waterlogging x low-N stress. However in both the stress combinations (drought x low-N and waterlogging x low-N) chlorophyll content decreases significantly, low-N stress has synergistic effect on the maize plants. Hence the overall effect of stress combination was negative causing enhanced damage to plants. Whereas, interaction of drought x waterlogging stress showed the antagonized each other response that primarily enhanced growth parameters (leaf area, plant height and stem diameter) and it has improved the tolerant mechanism of maize plants. Therefore we concluded, the response of maize various plants exposed to combinations of stresses is depend on interaction of stresses.