NPAS2 and PER2 are linked to risk factors of the metabolic syndrome     

Ani Englund  Leena Kovanen  Sirkku T Saarikoski  Jari Haukka  Antti Reunanen  Arpo Aromaa  Jouko Lönnqvist  Timo Partonen 《Journal of circadian rhythms》2009,7(1):5-9

Background  

Mammalian circadian clocks control multiple physiological events. The principal circadian clock generates seasonal variations in behavior as well. Seasonality elevates the risk for metabolic syndrome, and evidence suggests that disruption of the clockwork can lead to alterations in metabolism. Our aim was to analyze whether circadian clock polymorphisms contribute to seasonal variations in behavior and to the metabolic syndrome.  相似文献   

一些竹种在不同季节不定根诱导的形式     

Singh S. Nain N.P.S. Meena S.L. Tripathi S. E 《世界竹藤通讯》2008,(3):48-48

考察了季节和植物激素、非植物激素生长调节剂对不定根形成的影响,以进行黄竹、孝顺竹、马甲竹和龙竹无性繁殖。在冬天,夏天和雨季的3个生长季节,将成熟秆截取成单节扦插方式,并用IAA,IBA、NAA、硼酸和水进行24h处理。之后,将扦插秆水平放置,盖上沙子,在喷雾箱中放2个月。  相似文献   

Nutrient losses from rain‐fed bench terraced cultivation systems in high rainfall areas of the mid‐hills of Nepal     

G. P. Acharya  M. A. McDonald  B. P. Tripathi  R. M. Gardner  K. J. Mawdesley 《Land Degradation \u0026amp; Development》2007,18(5):486-499

Between the elevations of 1000 and 2000 m in the mid‐hills of Nepal, over 12 million people subsist on land‐holdings of less than 0·5 ha. These farmers have limited access to commercial inputs such as fertilisers and are reliant on organic manures for soil fertility maintenance. Participatory research was conducted with farmers on bari land (upper slope rain‐fed crop terraces) in the hill community of Landruk (bench terraces 0–5° slope, 3000–3500 mm annual rainfall, which aimed to develop soil and water management interventions that controlled erosion without resulting in high leaching, and so were effective in minimising total nutrient losses. Interventions tested were the control of water movement through diversion of run‐on and planting fodder grasses on terrace risers on bench terraces. The interventions were effective in reducing soil loss from the bari land in comparison with existing farmer practices, but no effect was observed on nutrient losses in solution form through runoff and leaching. Losses of NO₃‐N in leachate ranged from 17·3 to 99·7 kg ha⁻¹ yr⁻¹, but only 0·7 to 5·6 kg ha⁻¹ yr⁻¹ in runoff. The overall nutrient balance suggests that the system is not sustainable. Fertility is heavily dependent on livestock inputs and if the current trends of declining livestock numbers due to labour constraints continue, further losses in productivity can be expected. However, farmers are interested in interventions that tie ecosystem services with productivity enhancement and farmers' priorities should be used as entry points for promoting interventions that are system compatible and harness niche opportunities. Copyright © 2007 John Wiley & Sons, Ltd.  相似文献   

Production and characterization of “second generation” somatic hybrids derived from protoplast fusion between interspecific somatohaploid and dihaploidSolanum tuberosum L.     

Veli-Matti Rokka  Jari P. T. Valkonen  Airi Tauriainen  Leena Pietilä  Renata Lebecka  Ewa Zimnoch-Guzowska  Eija Pehu 《American Journal of Potato Research》2000,77(3):149-159

Protoplasts were fused to produce somatic hybrids between a triploid (2n=3x=32-34) interspecific somatohaploid betweenSolanum brevidens Phil. andS. tuberosum L., and a dihaploid (2n=2x=24) anther-derived line ofS. tuberosum cv. Van Gogh. A total of 265 plants were regenerated from protoplast fusion derived calli and their hybridity was verified using fusion partner specific RAPD markers. These “second generation” somatic hybrids were aneuploid pentaploids (2n=5x=51-65) with a 2C DNA content ranging from 3.36 to 4.43 pg, which corresponded to the sum of the 2C values of each of the fusion partners (somatohaploid: 2.22 pg; and the dihaploid line of cv. Van Gogh: 1.87 pg). Most of the “second generation” somatic hybrids were vigorous, but variable in morphology. They were extremely resistant to PLRV and they had tolerance to PVY infection derived from the somatohaploid fusion partner. Even though most of the “second generation” hybrids tuberized, the tuber morphology was variable and most were poorly shaped. InErwinia soft rot resistance tests, the tubers showed higher level of resistance than the tetraploidS. tuberosum cultivars, the dihaploidS. tuberosum fusion partners and the hexaploid somatic hybrids betweenS. brevidens andS. tuberosum. The “second generation” somatic hybrids were all male sterile and failed to produce berries or seeds.  相似文献   

Genomic prediction of grain yield in commercial Finnish oat (Avena sativa) and barley (Hordeum vulgare) breeding programmes     

Hanna Haikka  Timo Knürr  Outi Manninen  Leena Pietilä  Mika Isolahti  Esa Teperi  Esa A. Mäntysaari  Ismo Strandén 《Plant Breeding》2020,139(3):550-561

Genomic selection has been adopted in many plant breeding programmes. In this paper, we cover some aspects of information necessary before starting genomic selection. Spring oat and barley breeding data sets from commercial breeding programmes were studied using single, multitrait and trait-assisted models for predicting grain yield. Heritabilities were higher when estimated using multitrait models compared to single-trait models. However, no corresponding increase in prediction accuracy was observed in a cross-validation scenario. On the other hand, forward prediction showed a slight, but not significant, increase in accuracy of genomic estimated breeding values for breeding cohorts when a multitrait model was applied. When a correlated trait was used in a trait-assisted model, on average the accuracies increased by 9%–14% for oat and by 11%–28% for barley compared with a single-trait model. Overall, accuracies in forward validation varied between breeding cohorts and years for grain yield. Forward prediction accuracies for multiple cohorts and multiple years’ data are reported for oat for the first time.  相似文献   

Integrated breeding approaches for improving drought and heat adaptation in chickpea (Cicer arietinum L.)     

Pooran M. Gaur  Srinivasan Samineni  Mahendar Thudi  Shailesh Tripathi  Sobhan B. Sajja  Veera Jayalakshmi  Durdundappa M. Mannur  Adiveppa G. Vijayakumar  Nadigatla V. P. R. Ganga Rao  Chris Ojiewo  Asnake Fikre  Paul Kimurto  Robert O. Kileo  Nigusie Girma  Sushil K. Chaturvedi  Rajeev K. Varshney  Girish P. Dixit 《Plant Breeding》2019,138(4):389-400

Chickpea (Cicer arietinum L.) is a dry season food legume largely grown on residual soil moisture after the rainy season. The crop often experiences moisture stress towards end of the crop season (terminal drought). The crop may also face heat stress at the reproductive stage if sowing is delayed. The breeding approaches for improving adaptation to these stresses include the development of varieties with early maturity and enhanced abiotic stress tolerance. Several varieties with improved drought tolerance have been developed by selecting for grain yield under moisture stress conditions. Similarly, selection for pod set in the crop subjected to heat stress during reproductive stage has helped in the development of heat‐tolerant varieties. A genomic region, called QTL‐hotspot, controlling several drought tolerance‐related traits has been introgressed into several popular cultivars using marker‐assisted backcrossing (MABC), and introgression lines giving significantly higher yield than the popular cultivars have been identified. Multiparent advanced generation intercross (MAGIC) approach has been found promising in enhancing genetic recombination and developing lines with enhanced tolerance to terminal drought and heat stresses.  相似文献   

Clinicopathological findings of an episode of mycotoxicosis in horses     

R. K. Dedar  N. Virmani  P. A. Bala  J. Singh  R. K. Vaid  R. A. Legha  B. N. Tripathi 《Equine Veterinary Education》2019,31(5):236-241

This report of mycotoxicosis in horses describes the clinical signs, post-mortem findings, histopathological findings and prognosis following the accidental feeding of mycotoxin contaminated fodder to the horses at a farm over a 3-year period. Variable clinical signs viz. weight loss, height retardation in foals, episodes of sudden weakness and staggering gait, ulceration in the oral cavity and at mucocutaneous junctions, yawning, decreased appetite to complete anorexia, rectal prolapse, and failure of blood clotting were observed in many horses at an organised equine farm over a period of 2–3 years. Post-mortem examination of these cases revealed liver cirrhosis and pathological changes in other organs too. On examination of the fodder, it was observed that pearl millet fodder fed to the animals had ergot infestation. On laboratory investigation of the fodder, aflatoxins levels ranged from 24 ppb to 70 ppb in pearl millet fodder. The analysis eventually led to discontinuation of the pearl millet fodder. On follow-up for 2 years, no new cases of hepatic cirrhosis were seen. Most of the horses at the farm including those that had shown high levels of serum gamma glutamyl transferase (GGT) and weight loss, recovered completely. The present episode demonstrates that there is a need for regular monitoring of cereal fodders of horses in subtropical and tropical areas to avoid mycotoxicosis. In the present episode, monitoring serum/plasma GGT levels was found to be a sensitive biochemical indicator to identify liver damage caused by mycotoxins.  相似文献   

Potential Inhibitors for SARS-CoV-2 and Functional Food Components as Nutritional Supplement for COVID-19: A Review     

Singh  Pushpendra  Tripathi  Manish Kumar  Yasir  Mohammad  Khare  Ruchi  Tripathi  Manoj Kumar  Shrivastava  Rahul 《Plant foods for human nutrition (Dordrecht, Netherlands)》2020,75(4):458-466

Plant Foods for Human Nutrition - The severe acute respiratory syndrome is a viral respiratory infection and commonly called as COVID-19, caused by severe acute respiratory syndrome coronavirus-2...  相似文献   

Effects of timing of soil frost thawing on Scots pine     

Repo T  Kalliokoski T  Domisch T  Lehto T  Mannerkoski H  Sutinen S  Finér L 《Tree physiology》2005,25(8):1053-1062

Effects of the timing of soil thawing in the spring on Scots pine (Pinus sylvestris L.) were studied under controlled laboratory conditions. Sixteen 6-year-old saplings were lifted from the field, replanted in containers and placed in four treatments in controlled environment (CE) chambers with four replicate saplings per chamber. The saplings were held in the CE chambers during one simulated winter and one simulated growing season. The soil was frozen to -2 degrees C during a second simulated winter in the CE chambers, and the soil thawing treatments began at the end of the second simulated winter. Soil thawing began at various times before (no delay in thawing) and after (delay in thawing) chamber air conditions were changed from simulated winter to simulated summer. Delayed soil thawing subjected saplings to stress, with the severity of stress depending on the length of the delay in thawing. If there was no delay or only a short delay in soil thawing, stress was minor and reversible. A 2-week delay in soil thawing led to death of the saplings. Stress was apparent as decreases in the variable to maximal chlorophyll fluorescence ratio (Fv/Fm), chlorophyll a/b ratio and needle water potential. In needles of stressed saplings, apoplastic electrical resistance first decreased and then increased and there were anomalies in the electrical impedance spectra of the stems. Stress from the soil thawing treatments affected both root and shoot growth.  相似文献   

Freeze-dried powder of cow urine reduces the viability of the snail Lymnaea acuminata     

Ruchi Tripathi  V. K. Singh  D. K. Singh 《Journal of pest science》2006,79(3):143-148

Molluscicidal activity of cow urine alone and with different additives was studied against Lymnaea acuminata. The toxicity of cow urine kept for 15 days in sunlight (8 h/day) or ambient laboratory conditions against the snail was time- and concentration-dependent. The pH of fresh cow urine is 7.4 which changes to 10.9 when kept for 15 days in laboratory; exposure to sunlight for the same period alter the pH to 10.85. Binary combinations (1:1) of freeze-dried cow urine kept for 15 days separately with each of Allium sativum (Liliaceae) bulb powder, Azadirachta indica (Meliaceae) oil, Annona squamosa (Annonaceae) seed powder, Ferula asafoetida (Apiaceae) root latex and tea leaves, and Camellia sinensis (Theaceae) were more toxic to the snail than treatment with urine alone. Additives to cow urine in sunlight were more effective than those under laboratory conditions.  相似文献