Combining ability analysis to identify suitable parents for heterosis in seed cotton yield,its components and lint % in upland cotton     

Naqib Ullah Khan  Gul Hassan  Moula Bux Kumbhar  Khan Bahadar Marwat  Muhammad Azim Khan  Aisha Parveen  Muhammad Saeed 《Industrial Crops and Products》2009,29(1):108-115

Combining ability and heterosis were studied in a 6 × 6 diallel cross to see the nature of gene action in Upland cotton (Gossypium hirsutum L.) during 2002 to 2004. Analysis of variance revealed highly significant differences among all the F₁ and F₂ hybrid means and their respective six parental values for all the traits examined. In both generations, the mean squares due to general combining ability (GCA) and specific combining ability (SCA) were also highly significant. SCA genetic variances were greater than GCA and more important for the traits, i.e. boll weight, boll number and seed cotton yield per plant, showing the predominance of non-additive gene action. Lint % in both generations and boll weight in F₂s only were controlled by additive type of gene action due to maximum GCA variances. Cultivar CIM-1100 was found to be the best general combiner and its utilization produced valuable hybrids with desirable SCA in both generations. F₁ and F₂ hybrids, viz., CIM-1100 × CRIS-9, CIM-1100 × FH-682, CIM-1100 × BH-36 and CIM-109 × CIM-1100 as high × low and low × high parents performed well in SCA determination, outstanding mean performance and heterosis. Better SCA effects associated with useful heterosis were more pronounced for yield traits. In F₁ hybrids, maximum heterosis was observed for seed cotton yield followed by boll number, boll weight and lint %. The heterosis over better parent was +3.13 to +65.63% for bolls per plant, +0.75 to +24.40% for boll weight, +0.82 to +115.22% for seed cotton yield and +0.27 to +3.88% for lint %. Involvement of CIM-1100 in most of the F₁ and F₂ hybrids resulted in the synthesis of superior genotypes for most of the traits studied. Inbreeding depression was elevated in good performing hybrids and was the highest for seed cotton yield. Highest yielding F₁ hybrids yielded lesser in the subsequent generation due to over-dominance and inbreeding depression, whereas moderate yielding F₁ hybrids were found more stable even passing through process of segregation due to additive gene action. The combined performance of F₁ and F₂ hybrids could be a good indicator to identify the most promising populations to be utilized either as F₂ hybrids or as a resource population for further selection.  相似文献   

Ophthalmic findings in a herd of Caspian miniature horses     

Houman Faghihi  Seyed Mehdi Rajaei  Ghazal Aftab  Saeed Ozmai  Salar Golabdar 《Equine Veterinary Education》2023,35(2):e105-e111

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Antibacterial activities of some constituents from oleo-gum-resin of Commiphora mukul     

Saeed MA  Sabir AW 《Fitoterapia》2004,75(2):204-208

The essential oil, chloroform extract and seven sesquiterpenoids compounds newly isolated from the oleo-gum-resin of Commiphora mukul showed a wide range of inhibiting activity against both Gram (+) and Gram (-) bacteria.  相似文献   

Generalized Nonlinear Mixed-Effect Model of Individual TREE Height to Crown Base for Larix Olgensis Henry in Northeast China     

Lei Pan  Guangyi Mei  Yifu Wang  Sajjad Saeed  Liping Chen  Yuanshuai Cao 《Journal of Sustainable Forestry》2020,39(8):827-840

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Effects of cow manure and sewage sludge on the activity and kinetics of <Emphasis Type="SmallCaps">l</Emphasis>-glutaminase in soil     

Saeed Hojjati  Farshid Nourbakhsh 《Biology and Fertility of Soils》2007,43(4):491-494

A study was conducted to investigate the effects of cow manure and sewage sludge application on the activity and kinetics of soil l-glutaminase. Soil samples were collected from a farm experiment in which 0, 25, and 100 Mg ha⁻¹ of either cow manure or sewage sludge had been applied annually for 4 consecutive years to a clay loam soil (Typic Haplargid). A chemical fertilizer treatment had also been applied. Results indicated that the effects of chemical fertilizer and the solid waste application on pH in the 18 surface soil (0–15 cm) samples were not significant. The organic C content, however, was affected significantly by the different treatments, being the greatest in soils treated with 100 Mg ha⁻¹ cow manure, and the least in the control treatment. l-Glutaminase activity was generally greater in solid-waste applied soils and was significantly correlated (r = 0.939, P < 0.001) with organic C content of soils. The values of l-glutaminase maximum velocity (Vmax) ranged from 331 to 1,389 mg NH₄ ⁺–N kg⁻¹ 2 h⁻¹. Values of the Michaelis constant (K _m) ranged from 35.1 to 71.7 mM. Organic C content of the soils were significantly correlated with V _max (r = 0.919, P < 0.001) and K _m (r = 0.763, P < 0.001) values. These results demonstrate the considerable influence that solid waste application has on this enzymatic reaction involved in N mineralization in soil.  相似文献   

The use of receiver operating characteristic (ROC) analysis to assess the diagnostic value of serum amyloid A, haptoglobin and fibrinogen in traumatic reticuloperitonitis in cattle     

Nazifi S  Ansari-Lari M  Asadi-Fardaqi J  Rezaei M 《Veterinary journal (London, England : 1997)》2009,182(2):315-319

Acute phase proteins (APPs) such as serum amyloid A (SAA), haptoglobin (Hp), and plasma fibrinogen (Fb) are diagnostic and prognostic biomarkers. This study determined the pattern of SAA in traumatic reticuloperitonitis (TRP) in cows, and compared the findings with Hp, and plasma Fb concentrations in the differential diagnosis of TRP using receiver operating characteristic (ROC) analysis. Blood samples were collected from 89 cows: 53 cases of TRP, 16 animals with other internal disorders and 20 healthy controls.SAA and Hp had a similar pattern and magnitude of changes in TRP. Using the ROC method, the optimal cut-off for the diagnosis of TRP was 68 μg/mL for SAA and 0.74 g/L for Hp, with 100% sensitivity and 86.1% specificity; either of these parameters may therefore be used as a sensitive and relatively specific tool for the differential diagnosis of TRP in cattle. The diagnostic accuracy of plasma Fb was significantly lower than either SAA or Hp (P < 0.01). The combined use of these APPs (whilst aware of their conditional interdependence) may not provide any additional diagnostic information than can be obtained using either SAA or Hp alone.  相似文献   

Disease Progress Based on Effects of Verticillium dahliae and Pratylenchus penetrans on Gas Exchange in Russet Burbank Potato     

Saeed IA  Macguidwin AE  Rouse DI 《Phytopathology》1997,87(4):440-445

ABSTRACT The interactive effects of concomitant infection by the nematode Pratylenchus penetrans and the fungus Verticillium dahliae on symptom expression in Russet Burbank potato was studied in growth chamber experiments. Treatments were P. penetrans at three initial densities, V. dahliae at one inoculum density, the combination of the nematode at these three densities and the fungus, and a noninfested control. Gas exchange was measured nondestructively in leaf cohorts of different ages, one to three times weekly, with a LI-COR portable photosynthesis system. The single-pathogen treatments had no effect on assimilation or transpiration rates, but joint infection had a significant impact. In concomitant infection, photosynthesis was impaired more than transpiration, so estimates of leaf health were based on carbon assimilation rates only. Reductions in assimilation rate were apparent before the onset of visual symptoms. Assimilation rates decreased as much as 44% in the top, and newest, leaves of concomitantly infected plants, compared to rates in control plants. Even so, the health of newly produced leaves did not become progressively worse through time. With light use efficiency less than 0.20 mol of CO(2) fixed per mol of photosynthetically active radiation used as the criterion for disease incidence, disease progressed acropetally from the oldest to the youngest leaves. In plants infected with P. penetrans (0.8 nematodes per cm(3) of soil) in combination with V. dahliae, all leaves in cohorts 1 and 2 were symptomatic by 45 days after planting, and leaves in cohorts 3 to 6 became symptomatic at weekly intervals thereafter. For the control and single-pathogen treatments, the first time that light use efficiency fell below 0.20 in all leaves in cohort 1 was 71 days after planting. Concomitant infection reduced leaf life span by about 3 weeks. Both visual and physiological symptom expression were invariant to differences in initial nematode inoculum densities ranging from 0.8 to 2.5 nematodes per cm(3) of soil in one experiment and from 1.3 to 4.1 nematodes per cm(3) of soil in a second experiment.  相似文献   

ExperimentalSchistosoma mansoni infection in sheep     

A. A. Saeed  G. S. Nelson 《Tropical animal health and production》1974,6(1):45-52

Summary Sheep are partially susceptible toSchistosoma mansoni infection. However, development of worms is slow and they are reduced in size. No anaemia is produced in the infected animals, but a moderate degree of eosinophilia occurs at a late stage. The peculiar pathological lesions observed in the liver of ruminants is recorded and a simple technique suitable for perfusion of adult schistosome worms in large animals is described.

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Sumario Los ovinos son parcialmente susceptibles a la infección conSchistosoma mansoni. Sin embargo, el desarrollo de los parásitos es lento y tambien estan reducidos en tama?o. No se produce anemia en los animales infectados pero si ocurre un grado moderado de eosinofilia en los estadíos finales. Las lesiones patológicas peculiares observadas en el hígado de los rumiantes son descritas y tambien una tecnica simple adecuada para la perfusión de schistosomas adultos en animales mayores.

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Résumé Les moutons sont fablement sensibles à l'infection àSchistosoma mansoni. Toutefois, le développement des vers est lent et ceux-ci ont une taille réduite. Les animaux infectés ne présentent pas d'anémie, mais une éosinophilie modérée se produit à un stade avancé. Les lésions pathologiques spécifiques observées dans le foie des ruminants sont décrites, ainsi qu'une technique simple de perfusion de schistosomes adultes chez les grands animaux.

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Incorporated maize residues will induce more accumulation of new POC in HF compared with that in LF soils: a comparison of different residue types     

Wang  Yang  Li  Shuangyi  Xu  Yingde  Li  Ming  Shan  Te  Zhang  Weijun  Liu  Xu  Saeed  Muhammad Farhan  Wang  Jingkuan 《Journal of Soils and Sediments》2020,20(11):3941-3950

Journal of Soils and Sediments - The distribution and dynamic of residue-derived carbon after incorporation into soil at different fertility levels have been well documented. However, the...  相似文献   

Biochemical diversity in wild and cultivated pomegranate (Punica granatum L.) in Pakistan     

Muhammad Nafees  Muhammad Jafar Jaskani  Saeed Ahmad  Muhammad Shahid  Zaffar Malik  Moazzam Jamil 《The Journal of Horticultural Science and Biotechnology》2017,92(2):199-205

The present study was conducted to screen out elite pomegranates through determination of biochemical diversity in wild and cultivated genotypes for a breeding program and for fresh/processed use in industry. The results showed high morphological diversity in accessions of wild pomegranate fruits as compared to cultivated genotypes. The first six principal components covered 80.75 and 75.49% diversity in 53 wild and 62 cultivated pomegranate genotypes, respectively. High values of the coefficient of variance (10.78–18.62%), and a high range of minimum to maximum values of total soluble solids, titratable acidity, ascorbic acid content, total soluble sugars, and total phenolic content (0.10–1.25, 5.88–29.96, 9.69–19.85 and 175.05–595.42), respectively, were recorded in the studied genotypes. Ascorbic acid content had a strong correlation with antioxidant activity (0.952%), super dismutase oxides (0.94%), catalase (0.921%), and titratable acidity (0.91%). Peroxides had a strong correlation (0.88%) with catalase, and 0.81% each with super dismutase oxides and antioxidant activity. Wild and cultivated pomegranates were clustered successfully in separate groups, based on biochemical traits. A variety improvement program and selection of high-quality pomegranate genotypes could help to reduce pomegranate-related malnutrition issues in the human diet.  相似文献