Inheritance and allelic relationship among gene(s) for blast resistance in pearl millet [Pennisetum glaucum (L.) R. Br.]          下载免费PDF全文

Shweta Singh  Rajan Sharma  Bheemavarapu Pushpavathi  Shashi Kumar Gupta  Ch. V. Durgarani  Chandramani Raj 《Plant Breeding》2018,137(4):573-584

Six blast‐resistant pearl millet genotypes, ICMB 93333, ICMB 97222, ICMR 06444, ICMR 06222, ICMR 11003 and IP 21187‐P1, were crossed with two susceptible genotypes, ICMB 95444 and ICMB 89111 to generate F₁s, F₂s and backcrosses, BC₁P₁ (susceptible parent × F₁) and BC₁P₂ (resistant parent × F₁) for inheritance study. The resistant genotypes were crossed among themselves in half diallel to generate F₁s and F₂s for test of allelism. The F₁, F₂ and backcross generations, and their parents were screened in a glasshouse against Magnaporthe grisea isolates Pg 45 and Pg 53. The reaction of the F₁s, segregation pattern of F₂s and BC₁P₁ derived from crosses involving two susceptible parents and six resistant parents revealed the presence of single dominant gene governing resistance in the resistant genotypes. No segregation for blast reaction was observed in the F₂s derived from the crosses of resistant × resistant parents. The resistance reaction of these F₂s indicated that single dominant gene conferring resistance in the six genotypes is allelic, that is same gene imparts blast resistance in these genotypes to M. grisea isolates.  相似文献   

Development of Jatropha hybrids with enhanced growth,yield and oil attributes suitable for semi-arid wastelands     

Aruna R. Prakash  Sarnam Singh  Ch. Ravi Prakash  Arup Ghosh  Pradeep K. Agarwal 《Agroforestry Systems》2016,90(3):541-553

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Prediction of root zone water and nitrogen balance in an irrigated rice field using a simulation model     

Ch. Jyotiprava Dash  A. Sarangi  D. K. Singh  A. K. Singh  Partha Pratim Adhikary 《Paddy and Water Environment》2015,13(3):281-290

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Highly diverse type of equine arteritis virus (EAV) from the semen of a South African donkey: short communication     

Stadejek T  Mittelholzer Ch  Oleksiewicz MB  Paweska J  Belák S 《Acta veterinaria Hungarica》2006,54(2):263-270

Equine arteritis virus (EAV) was detected by RT-nested PCR in semen samples from a naturally infected South African donkey. Sequence analysis of the amplified ORF5 fragment revealed only 60 to 70% nucleotide identity to a panel of EAV reference sequences. The unique donkey EAV sequence was also found to be stable during passage in horses. The sequence data reported in this study indicate that the South African donkey variant might represent a new genotype of EAV. The distinct genetic properties of the South African asinine strain of EAV suggest a divergent evolution of this arterivirus in various host species or, alternatively, a possible role for African donkeys in the emergence of EAV in horses.  相似文献   

Effect of synthetic insecticides on the larvae of <Emphasis Type="Italic">Coccinella septempunctata</Emphasis> from Greek populations     

Panagiotis J. Skouras  George J. Stathas  Costas Ch. Voudouris  Anastasios I. Darras  John A. Tsitsipis  John T. Margaritopoulos 《Phytoparasitica》2017,45(2):165-173

Coccinella septempunctata L. is one of the most abundant ladybird species in Greece, preying on several aphid species and other arthropods, of which many are pests of cultivated plants. These pests are usually controlled with chemical insecticides. During this process, however, beneficials are also exposed to pesticides. The development of Integrated Pest Management (IPM) programs against aphids requires the evaluation of the effects of insecticides on beneficial insects. We evaluated the LD₅₀ of imidacloprid, acetamiprid, bifenthrin and deltamethrin on first, second, third and fourth instar larvae of C. septempunctata by topical application. Moreover, we studied their sublethal effects (LD₁₀) on the development, weight and prey consumption of fourth instar larvae. The topical application bioassays showed that deltamethrin and bifenthrin were highly toxic to all larval instars, whereas imidacloprid and acetamiprid were less toxic to fourth instar larvae. The LD₁₀ dose significantly affected, developmental time, adult weight and daily predation. These results show the importance of assessing potential effect of insecticides on C. septempunctata for developing effective IPM programs of aphids in Greece.  相似文献   

Alleviation of Salt Stress in Durum Wheat (Triticum durum L.) Seedlings Through the Application of Liquid Seaweed Extracts of Fucus spiralis     

Salma Latique  Chernane Halima  Hannachi Chérif  El Kaoua Mimoun 《Communications in Soil Science and Plant Analysis》2017,48(21):2582-2593

Many research studies have shown the importance of seaweed extract (SWE) in alleviating stress damage to plants. In this study, we examined the effect of liquid SWEs made from brown seaweed, Fucus spiralis, on germination, growth, antioxidant enzymes and some biochemical attributes of durum wheat under different levels of NaCl concentrations. Application of SWE at different concentrations (5, 10, 25, and 50%) significantly enhanced seed germination and growth parameters under salt stress, especially with 25% of seaweed liquid extract. Results show that the activity of antioxidant enzymes increased with increasing the algal extract concentration to 50%. Therefore, algal treatment is proved to be an effective technique to improve the growth of wheat seedlings under salt stress conditions. This study provides important information on the identification and utilization of seaweed resources for agriculture and it is the first study to report on the uses of this macroalgae as biostimulants in agriculture.

Abbreviations TG: total germination (%); SL: shoot length (cm); SFW: seedling fresh weight (g); SDW: seedling dry weight (g); TC: total carotenoids (mg/g.FW); TSP: total soluble proteins (mg/g.FW); SSC: soluble sugars content (mg/g.FW); TPC: (µg equivalent AG/mg DW); CAT: catalase (U mg^?1 protein); SOD: superoxide dismutase (U mg^?1 protein); APX: ascorbate peroxydase (U mg^?1 protein).  相似文献   

Identification of a virus naturally infecting sorghum in India as <Emphasis Type="Italic">Sugarcane streak mosaic virus</Emphasis>     

K. P. Srinivas  Ch. V. Subba Reddy  B. Ramesh  P. Lava Kumar  P. Sreenivasulu 《European journal of plant pathology / European Foundation for Plant Pathology》2010,127(1):13-19

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A remote irrigation monitoring and control system (RIMCS) for continuous move systems. Part B: field testing and results     

José L. Chávez  Francis J. Pierce  Todd V. Elliott  Robert G. Evans  Yunseop Kim  William M. Iversen 《Precision Agriculture》2010,11(1):11-26

Precision irrigation systems can have inherent errors that affect the accuracy of variable water application rates controllers, as well as affect the controllers’ performance when evaluated on different continuous move irrigation systems configurations. The objective of this study was to assess the performance of a remote irrigation monitoring and control system (RIMCS) installed on two separate linear move (LM) irrigation systems. The RIMCS varies water application rates by pulsing nozzles controlled by solenoids connected via relays to a single board computer (SBC) with wireless Ethernet connection to a remote server. The system also monitors irrigation system flow, pressure, position and wireless field sensor networks. The system was installed on a LM irrigation system in Prosser, Washington, USA and on a LM in the Nesson Valley of North Dakota, USA. For the LM at Prosser, four pre-defined irrigation patterns were imposed and variable rates were applied as a percentage of the nozzle base application rate. Each nozzle was pulsed across the span length and along the LM travel direction. For the LM at the Nesson Valley, a quadratic pattern was imposed pulsing banks of nozzles along the LM travel direction. Standard catch can tests were performed and the system performance was evaluated by comparing measured catch can water depths with pre-determined target values. The RIMCS accuracy was found to be in the range of the LM uniform water depth application uniformity coefficients of 88–96%. The RIMCS was successfully transferred to another LM in North Dakota as indicated by the relatively low variable rate application errors of –8.8 ± 8.1% and −0.14 ± 6.7% for the two spans.  相似文献   

Effect of Quinoa Seeds (Chenopodium quinoa) in Diet on some Biochemical Parameters and Essential Elements in Blood of High Fructose-Fed Rats     

Paśko P  Zagrodzki P  Bartoń H  Chłopicka J  Gorinstein S 《Plant foods for human nutrition (Dordrecht, Netherlands)》2010,65(4):333-338

The effect of Chenopodium quinoa seeds on lipid profile, glucose level, protein metabolism and selected essential elements (Na, K, Ca, Mg) level was determined in high—fructose fed male Wistar rats. Fructose decreased significantly LDL [42%, p < 0.01] and activity of alkaline phosphatase [20%, p < 0.05], and increased triglycerides level [86%, p < 0.01]. The analysis of blood of rats fed quinoa indicated, that these seeds effectively reduced serum total cholesterol [26%, p < 0.05], LDL [57%, p < 0.008] and triglycerides [11%, p < 0.05] when compared to the control group. Quinoa seeds also significantly reduced the level of glucose [10%, p < 0.01] and plasma total protein level [16%, p < 0.001]. Fructose significantly decreased HDL [15%, p < 0.05] level in control group but when the quinoa seeds were added into the diet the decrease of HDL level was inhibited. Quinoa seeds did not prevent any adverse effect of increasing triglyceride level caused by fructose. It was shown in this study that quinoa seeds can reduce most of the adverse effects exerted by fructose on lipid profile and glucose level.  相似文献   

Canine haemophilia A caused by a mutation leading to a stop codon     

Mischke R  Wilhelm Ch  Czwalinna A  Varvenne M  Narten K  von Depka M 《The Veterinary record》2011,169(19):496b

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