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Inheritance Pattern of Achene Yield and Drought Stress Tolerance Related Traits in Sunflower

Thesis Info

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Author

Razzaq, Humera

Program

PhD

Institute

University of Agriculture

City

Faisalabad

Province

Punjab

Country

Pakistan

Thesis Completing Year

2017

Thesis Completion Status

Completed

Subject

Plant Breeding & Genetics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/13511/1/Humera_Razzaq_PB%26G_HSR_2017_UAF_07.06.2018.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726470088

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Sixty sunflower accessions were evaluated under Polyethylene glycol (PEG-6000) mediated drought stress. Selected tolerant and sensitive accessions were crossed in Line ´ Tester fashion and resultant F1 along with their parents were evaluated for drought tolerance in field and PEG mediated drought in lab. Data were recorded on morphological and physiological parameters to estimate genetic variability, general and specific combining ability effects, heterosis manifestation, gene action, correlation and path analyses. Genetic variation among the entries under normal and drought stress treatments, indicated that this breeding material may be used for the development of drought tolerant types. Combining ability analysis exhibited variable direction and magnitude of general combining (GCA) effects among line and testers and specific combining ability effects (SCA) among crosses. The lines A-23, G-33 and 017583 and testers HA-133 and 017577 were best general combiners under normal and drought stress treatments. Results of SCA indicated that crosses G G-61 × 017577, A-79 × CM-621, A-48 × CM-621, 017592 × CM-621, 017592 × 017577, 017566 × HA-341, G-33 × CM-621, G-33 × HA-342, A-79 × HA-133, 017592 × HA-124, A-48 × HA-341, A-48 × HA-342, G-61 × CM-621, HBRS-1 × 017577, A-23 × CM-621, 017566 × HA-124 and A-75 × 017577 were best specific combiners. Crosses G-61 × HA-124 and A-48 × HA-341 had also mid parent, better parent and commercial heterosis for various traits under treatments. Additive type of gene action was observed for germination percentage, days to 50% flowering, days to 50% maturity, stem diameter and oil content while other traits showing non-additive gene action. Association of traits based on correlation and path analyses suggested that seedling fresh weight, dry weight and hundred achene weight might be used as criteria for selection of sunflower for drought tolerance and high achene yield.
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حافظ محمد ابراہیم

حافظ محمد ابراہیم
افسوس ہے جنوری کے تیسرے ہفتہ میں حافظ محمد ابراہیم صاحب ایک طویل علالت کے دہلی میں وفات پاگئے۔ نماز جنازہ شاہ جہانی جامع مسجد میں پڑھی گئی اوراس کے بعد تدفین نگینہ میں ہوئی۔انتقال کے وقت عمر ۷۷۔ ۷۸ برس کی ہوگی۔ مرحوم علی گڑھ کی پرانی نسل کے ایک فرد تھے۔یہیں فلسفہ اور اقتصادیات کے مضامین کے ساتھ بی۔اے اورپھرایل۔ایل۔بی کیا۔اپنی ذہانت،طباعی اور لیاقت کے باعث اساتذہ اورطلباء میں ہمیشہ نیک نام اورہر دل عزیز رہے۔ دیوبند کے مکتبۂ فکر کے زیر اثر قوم پرورانہ خیالات اور جذبات شروع سے رکھتے تھے۔ چنانچہ جن لوگوں نے مرحوم کا عہد طالب علمی دیکھاہے ان کابیان ہے کہ مرحوم اس زمانہ میں بھی سرسید کے سیاسی افکار کے مخالف تھے اور اس پر اپنے ساتھیوں سے محبت کرتے تھے۔علی گڑھ سے فراغت کے بعد اپنے وطن نگینہ میں پریکٹس شروع کی اورایڈوکیٹ کی حیثیت سے بہت جلد صوبہ بھر میں مشہور ہوگئے لیکن نیشنلسٹ فطرتاًتھے۔اس لیے تحریک موالات شروع ہوئی تواُس میں بڑھ چڑھ کرحصہ لیااورپھر جنگ آزادی کادورآیا توہمیشہ اُس کے ہراوّل دستہ میں رہے۔اس سلسلہ میں جیل گئے اوردوسری پریشانیاں بھی اٹھائیں لیکن پائے ثبات میں لغزش نہ ہوئی۔ پھر جب قومی وزارتوں کا عہد شروع ہوا تو پہلے اتر پردیش میں اور پھر مرکز میں وزیر رہے، آخر میں پنجاب کے گورنر تھے۔ بیماری کے باعث اس سے مستعفی ہوکرگھر آ بیٹھے تھے اوریہی بیماری آخرجان لیوا ثابت ہوئی۔ نہایت خوش خلق، مہمان نواز اور فیاض و سیرچشم تھے۔اﷲ تعالیٰ مغفرت ورحمت کی نعمتوں سے سرفرازفرمائے۔آمین [فروری۱۹۶۸ء]

 

Historical Roots of Radicalization in Pashtun’s Society

This research article aims to trace the history of radical movements in the North-West frontier of sub-continent. Historically, radical movements have long roots in Pakhtun Society.  People recruited in different epochs from Pakhtun society branch into various freedom movements before the partition of sub-continent. Freedom movements against the Sikh, Hindu and the British lifted radical impact on Pakhtun Society before the partition of sub-continent.  Radical movements after the partition of sub-continent also established their roots in the North-West region of Pakistan. These radical movements engineered the pluralistic cultural values of Pakhtun Society. These movements have lifted radical trends in the North-West frontier of sub-continent. Pakhtuns and their cultural values were not only exposed to violence but the evolution of their culture had been disturbed.

Molecular and Genetic Characterization of Hiv and its Correlation With Antiretroviral Drug Resistance Among Aids Patients

Introduction: HIV is a retrovirus that replicates slowly and is responsible for acquired immunodeficiency syndrome (AIDS) in humans. Immune system is weakened ultimately making infected individuals more vulnerable to numerous secondary infections. According to an estimate, HIV has infected more than seventy million people since 1981 and is responsible for the death of 35 million people so far. By the end of year 2016, 36.7 million population were found to be living with HIV worldwide. Pakistan, a developing nation of 200 million inhabitants, is witnessing an increase in the number of HIV infected individuals. The improved use of antiretroviral therapy (ART) has reduced the morbidity and mortality linked with HIV, however, at the cost of the emergence of HIV drug resistance strains (HIVDR). No significant data exist about the epidemiology of HIV-1 genotypes and the drug resistance mutations. Objectives: To determine the molecular epidemiology of HIV-1 and its correlation with antiretroviral drug resistance among AIDS patients. Study design: Cross-sectional, prospective multi-centre study. Duration: January 2015 – June 2018. Setting: Department of Blood Transfusion Services, Shaheed Zulfiqar Ali Bhutto Medical University, Islamabad; Department of Pathology, Jinnah Postgraduate Medical Complex, Karachi; and Department of Biotechnology and Molecular Biology, International Islamic University, Islamabad. Methods: A total of 410 HIV-positive patients (both on treatment and treatment naïve) were recruited in the study. From the Voluntary Counselling and Treatment Centre (VCTC), Jinnah Postgraduate Medical Centre (JPMC), Karachi, blood samples were collected from 298 HIV/AIDS patients on antiretroviral therapy (ART). For the treatment of naïve individuals, a community based survey on 387 high risk group individuals was conducted in different cities yielding 37 HIV positive samples. In addition, 54,877 blood donors were screened for HIV-1&2 at the Department of Blood Transfusion Services, SZAB Medical University, of which, 75 were found reactive. HIV screening was performed by rapid point of care HIV screening device (AlereDetermineTM HIV-1/2, Alere North America Inc. USA). All samples were confirmed by the chemiluminescence immunoassay using fully automated Abbott Architect i2000SR system. The samples tested positive were re-tested using Abbott’s CLIA system. Using standard questionnaire, the study subjects were also interviewed regarding their living conditions, daily routines, travel history and sexual behaviour. Using standard methods, viral RNA of HIV was extracted from the blood specimens of positive patients, and was converted to cDNA. HIV cDNA of all positive patients was then analysed for the presence of various HIV genotypes (types and sub-types) by employing subtype-specific primers in a nested PCR (polymerase chain reaction). Sanger sequencing standard protocols was followed to detect the mutations in the genes related to drug resistance in HIV. All the data and samples were kept confidential and anonymous. HIV analyses was performed according to the conditions of “5-Cs”: comprising of informed consent, be confidential, involve counselling, deliver correct test results and connections to prevention, treatment and care services. Informed written consent was received from all study subjects participating in this study. Results: A total of 387 subjects from selected high risk groups (HRGs) agreed to provide blood sample. Out of 387, a total of 149 subjects tested positive for syphilis (38.5%), whereas 37 tested positive for HIV (9.6%). Syphilis co-infection was found in 22 of the HIV infected subjects (59.5%; odd ratio 2.53; p=0.008). The HIV screening of 54,877 blood donors initially yielded 77 reactive cases. A repeat testing showed 0.13% (n=75) positive cases (Fig 4.2), with 95% confidence intervals 0.0014 (0.0011 – 0.0018). No female donor was reactive for HIV. From the genotypic analysis of 410 HIV positive individuals, the predominant HIV-1 subtype was A (n=376) (91.7%) followed by subtype B (n=34) (8.3%). The results of reverse transcriptase region analysis for resistance mutations exhibited that 89% of the sequences do not have major and minor mutations. The percentage of sequences showing a major mutation was 11%. The major mutation was Y115F, where the patient sample is having Tyrosine (Tyr) at position 115, while the normal individual have Phenylalanine (Phe). The results of PR region analysis showed no major mutations. On the other hand, minor mutations were exhibited by six sequences. Two of the mutations were categorized as L10V, and the remaining four included A71AV, L10FL, G48GR and L10I. Conclusions: The present study has provided a complete baseline data on the molecular and genetic characterization of HIV/AIDS epidemic in Pakistan. Further studies of antiretroviral drug resistance mutations would help in streamlining resistance pattern and subsequent alternate therapies.