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Home > Grain Yield and Nutritional Quality of Commercial Maize Zea Mays L. Genotypes: Aspergillus Exposure and Aflatoxin Contamination

Grain Yield and Nutritional Quality of Commercial Maize Zea Mays L. Genotypes: Aspergillus Exposure and Aflatoxin Contamination

Thesis Info

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Author

Zafar, Sadia

Program

PhD

Institute

Government College University

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2019

Thesis Completion Status

Completed

Subject

Botany

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10856/1/Sadia%20Zafar_Botany_2019_GCU%28F%29_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726341926

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Maize, one of the world’s most important cereals is susceptible to an opportunistic pathogen, Aspergillus flavus and aflatoxin contamination, which ultimately causing both economic and human health related problems. The insufficient understandings of maize resistance to the fungus have made the selection of resistant genotypes difficult for scientists and cultivators. Fourteen different types of maize genotypes were investigated in the fields of Ayub Agricultural Research Institute, Faisalabad, Pakistan. The experiments were conducted in two maize growing seasons i.e., spring sowing (1st experiment) and autumn sowing (2nd experiment). The study was aimed to find out the maize host response to A. flavus exposure and its effect on the grain yield, quality (chemical composition) and aflatoxin accumulation during the spring and autumn seasons. For this purpose, A. flavus inoculum was applied in the cob during seed maturation. A. flavus inoculated plants produced some damage, however, these symptoms were negligible, but inoculated and non-inoculated cob were morphologically different that’s why visible symptoms of fungal infection on maize cob can be related to the infection by the A. flavus in maize genotypes. Fungal inoculation reduced the grains per cob, total grains weight/cob, protein, oil as well as carbohydrate contents of the grains. The maize genotype KSC-9663 produced better yield during spring season among all genotypes, used in this study. Maize genotype, FH1046 overall produced better yield during autumn season and maize genotype YH-1898 was better for chemical/nutritional quality (grain starch, fiber, ascorbic acid and carbohydrate contents) during spring as well as during autumn (grain fat, fiber, ash, carbohydrate, ascorbic acid and total free amino acid) seasons as compared to other genotypes. Maize genotype, KSC9618 produced highest phytochemicals (alkaloids, flavonoids, phenolic, proline, polyphenols) during spring season and R-2207 produced higher concentration of phytochemicals better during autumn season. Maize genotype, FH-1046 produced highest contamination of aflatoxins (AFG1 and AFB1), while, YH-1898 produced highest accumulation of AFB1 and Malka16 accumulated highest concentration of AFG2 in spring sowing experiment. Maize genotype, Pearl produced highest contamination of AFG1 and R-3305 produced highest aflatoxin contamination (AFB1) in autumn season. All genotypes showed resistance to AFB2 in both experiments, as did not produce or its level was lowered than the permissible limit for human consumption. 1st experiment (spring season) produced greater aflatoxin contamination as compared to 2nd experiment (autumn season). It is concluded that non-wounding A. flauvs inoculation could significantly affect the yield of maize genotypes under favorable weather conditions (for A. flauvs), which affected the yield and chemical composition of maize grains.
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۵۷۔کسے معلوم انجام محبت

کسے معلوم انجام ِ محبت
تیرے وعدوں کے خمیدہ رستے پر
میری نڈھال حسرتوں سے اور نہیں چلا جاتا
تم سے جڑی ہر آس بغاوت پراتر آئی ہے
تمھاری یہ محبت جفائوں کا آمیختہ ہے
تمھاری تسلیاں اور پیار کے دلاسے سب میرا آموختہ ہے
ہر صبح میری سرخ آنکھیں امیدِ نوکا سورج دیکھتی ہیں
مگر جب شام سرمئی اندھیرا پہن لیتی ہے
انتظار کے چراغوں کا دھواں آنکھوں کی پتلیاں پھیلا دیتا ہے
یہ انتظار کب مجھے نیند کی وادی میں دھکیل دیتا ہے، معلوم نہیں
خوابوں کی تتلیاں بو جھل پلکوں پر آبیٹھتی ہیں
رات بھر تیرے خوابوں کی ایک مجلس بپارہتی ہے
سَحرہونے سے ذرا پہلے ایک ماتمی جلوس برآمد ہوتا ہے
حسرتیں نوحہ کناں ہوتی ہیں
آہیں اورنالے زنجیر زنی کرتے ہیں
محبت اپنے ’’ہونے ‘‘ اور ’’نہ ہونے‘‘ کی مرثیہ خوانی میں مصروف ہے
دل ایک کونے میں پڑا کانپتا ہوا محوِ دعا ہے
منتظر ہے کسی سورج کی حدت بھری کرنوں کا
جو اس کے بدن میں استراحت بھر دیں

شرعی امور میں آسانی اور سہولت کا تصور، قرآنی احکام کی روشنی میں

Islam is considered to be the religion of nature due to its originality and suitability to human nature for all times or centuries. It continues to be successful in the developed world, and elsewhere, because its call is in accordance with the fitrah or natural inclinations of mankind. Allah, subhanahu wata'aala, is the creator of mankind and therefore knows his nature more intricately than mankind himself. Allah has therefore chosen for us a religion best suited to the nature of mankind, a religion that goes neither to the extremes of hardship nor of laxity, but instead provides a middle path; in other words, a religion of ease. Islam does not lay on people tasks that they cannot do or they will have difficulty in doing. Whenever, there is any difficulty performing any religious obligation faced by Muslims, they have provided an element of ease and comfort. In this regard, the focus of this paper is to throw light on the notion of ease and leniency of Islam.  

Developemnt and Validation of Model of Aural Rehabilitation of Profound Hearing Impaired Children in Punjab- an Experimental Study

Persons with hearing loss have been seen, but the problems and frustration imposed by this loss in their lives have not been imagined. Only diagnosis of hearing loss and providing amplification is not enough to ensure the development of communication potentials of the hearing impaired children (HIC). Aural habilitation/rehabilitation services for children are the dire need of all those suffering from hearing loss, especially for those having severe and profound hearing loss. In Pakistan the rehabilitative plans merely cover speech therapy and special education services employing sign language and total communication as a medium of instruction. The efforts are not being focused on auditory development of the children, which is the base of all problems of HIC. Therefore, the researcher aimed to target this entirely neglected area of provision of aural rehabilitation services through a model in order to bring change in the lives of HIC in Pakistan. The objectives of the study were to collect data about current provisions of aural rehabilitation for hearing impaired children in Punjab, to develop a model of aural rehabilitation for deaf children in Pakistan, to develop a standardised tool to be used during experimentation and to validate the proposed model of aural rehabilitation via experimentation. The study carries immense significance from different angles in the context of the planning and management of educational cum rehabilitative plans of children with hearing loss. The model may serve as a guide to policy makers, administrators of special schools, speech therapists, teachers and parents. The design of the study was the pretest-posttest control group design. Sample groups were selected through random sampling technique. Data regarding current rehabilitation practices was obtained through questionnaires for teachers, speech therapists, audiologists, principals and parents of HIC. A framework of the proposed model was made with the help of logic model development guide and by incorporating the recommendations of the stakeholders obtained via questionnaires. Pakistani experts’ opinions were obtained through questionnaire for further modification required in the model. The model was validated through experimentation. A speech perception test was developed and its reliability and validity were established after conducting a pilot study. This test was used as the tool of experimentation i.e. to obtain the pretest and posttest scores of the HIC. The difference in mean speech perception scores of the control group and experimental group profound HIC at posttest level was significant at 0.01 level. It was concluded that aural rehabilitation is feasible as well as necessary for educational and vocational rehabilitation of HIC in Pakistan. Multidisciplinary approach in special schools to be served as preparatory schools for mainstreaming, provision of digital hearing aids from government, auditory training, integrated curriculum development, follow-up of IEP’s focusing on aural mode of communication, development of assessment tools in national and regional languages, efforts for screening and prevention of hearing loss and parental training cum involvement in planning and implementation of individual plans were considered as the necessary ingredients, to bring change in current educational cum aural rehabilitation programme of HIC in Punjab.