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Home > Genetics of Production Traits and Stripe Rust Resistance in Bread Wheat under Rainfed and Irrigated Conditions

Genetics of Production Traits and Stripe Rust Resistance in Bread Wheat under Rainfed and Irrigated Conditions

Thesis Info

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Author

Khan, Sher Nawab

Program

PhD

Institute

The University of Agriculture

City

Peshawar

Province

KPK

Country

Pakistan

Thesis Completing Year

2018

Thesis Completion Status

Completed

Subject

Plant Breeding & Genetics

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/10048/1/Sher%20Nawab%20Khan_PBG_UAP_PRR.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676726326088

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Understanding inheritance and biotic stress resistance is of crucial importance for the genetic improvement of any field crop. Wheat (Triticum aestivum L.) is one of the most important cereal crop. In the present studies, 8 × 8 diallel crosses were conducted in wheat during 2014-15. All the 56 F1 hybrids along with parental genotypes were evaluated during 2015-16 under irrigated and rainfed conditions to determine the genetic control of various traits and to find out resistance to stripe rust by using molecular markers. The experiment was conducted in completely randomized block design with 3 replications at the Department of Plant Breeding and Genetics, The University of Agriculture Peshawar-Pakistan. Molecular study was carried out in the Institute of Biotechnology and Genetic Engineering, The University of Agriculture Peshawar and at Plant Breeding Institute, The University of Sydney, Australia. Pooled analysis showed highly significant genotypes × environment interaction for all the studied characters except days to maturity, final rust severity (FRS) and relative area under disease progress curve (rAUDPC). Under both conditions among the genotypes significant differences were observed for the studied parameters. Among the parents, PS-13, JB and PS-05 performed well under both conditions. Under irrigated condition, cross combinations, Lal-13 × JB, KW ×PS-05 and JB × AH while under rainfed condition, cross combinations, PS-05 × PJ-11, Tat-96 × AH and JB × AH, showed best performance for yield and yield related characters. Under irrigated conditions maximum best parent heterosis was observed for cross combinations, KW × Lal-13, Lal-13 × PS-05, Tat-96 × PJ-11 and Lal-13 × JB, whereas, under rainfed conditions, JB × AH, PJ-11× Tat-96 and PS-13 × AH were best heterotic combinations for yield and yield contributing traits. Natural disease infestation was scored for disease infection under both conditions. Under irrigated condition cross combinations, Lal-13 × JB, KW × PS-05, JB × AH, KW × PS-13, Tat-96 × KW and PS-05 × AH and under rainfed condition cross combinations, PS-05 × PJ-11, Tat-96 × AH, JB × AH, Lal-13 × AH and Tat-96 × PS-05 showed best performance for most of the traits. Under both ii environments the genotypes were classified into different groups of high, moderate and low level of partial resistance on the basis of FRS, rAUDPC and average coefficient of infection (ACI) values. Through molecular study, using simple sequence repeats (SSRs) markers, the presence of yellow rust resistance genes, Yr5, Yr17 and Yr18, were confirmed in 76.5%, 78.1% and 37.5%, respectively, of the material studied. Under rainfed condition genotypes PS-05 × AH, PS-05 and PS-13 × PS-05 and under irrigated condition, Lal-13 × JB, PS-05 × Lal-13, PS-05 × Tat-96 and JB × PS-05 showed partial resistance in field. The rust resistant genes conferring partial resistance were present either individually or in combinations of two or three in the genotypes. In diallel analysis, under both irrigated and rainfed conditions highly significant dominant ‘b’ and additive ‘a’ genetic effects were observed for the studied characters except spikelets spike-1 having non-significant gene effects under both conditions and grains spike-1 having non-significant dominant gene effect under rainfed condition. Additive-dominance model was from complete to partially adequate for various characters under both environments. Similarly, for the studied characters both dominant (H) and additive (D) genetic components were significant under both environments. High broad and narrow sense heritability was estimated for all of the studied parameters except days to maturity, days to heading, 1000-grain weight and biological yield plant-1 which possessed low narrow sense heritability. Mean squares of SCA and GCA analysis were highly significant for the studied parameters except spikelets spike-1 and spike length which remained non-significant under both conditions, whereas, fertile tillers plant-1 remained non-significant under irrigated conditions only. SCA mean squares were smaller than GCA mean squares for yield and yield contributing traits indicating preponderance of additive genetic effects. Under irrigated condition cross combinations, PS-05 × JB, Tat-96 × PJ-11 and AH × PS-05 were best specific combiners while under rainfed condition AH × JB, AH × Tat-96 and PJ-11 × PS-05 were the best specific combiners for yield and yield associated traits. Based on overall results, crosses combinations, Lal-13 × JB, PS-13 × AH and PS-05 × AH were better yielders and had lower yellow rust severity and are recommended to be exploited in future breeding programs. These results suggested the significance of additive and dominant genetic variability and through integrated use of diallel crossing technique or pedigree method with recurrent selection, efficient improvement is possible.
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محمد امین مسعود صدیقی

محمد امین مسعود صدیقی
(ریاض الرحمن شروانی)
حبیب منزل، میرس روڈ، علی گڑھ،
۲۰۰۱-۳-۲۷ء۔
مکرمی و محترمی! السلام علیکم ورحمۃ اﷲ،
لکھنؤ سے کل ۲۵؍ مارچ کا ’’جدید مرکز‘‘ آیا تو اس میں محمد امین مسعود صدیقی صاحب کی اچانک وفات کی خبر پڑھ کر دلی صدمہ ہوا، اخبار میں اس خبر کی سرخی ’’مولانا آزادؒ کے عاشق تھے مسعود صدیقی‘‘ چھپی ہے اور اس سے بہتر سرخی کوئی اور نہیں ہوسکتی تھی۔ کیا عجیب عشق تھا کہ چاہتے تھے ہر فرد، ہر اخبار اور رسالہ اور ہر ادارہ اس عشق میں ان کا شریک ہوجائے۔ ہر ممکن طریقے سے مولانا آزادؒ کے پیغام کی اشاعت کے لئے سرگرداں رہتے تھے۔
ان میں اور بھی بہت سی خوبیاں تھیں، بہت دین دار، مخلص، متحرک اور بے نفس انسان تھے، میرا بہت لحاظ کرتے تھے۔ میں کسی معاملے میں ان سے اختلاف کرتا تھا تو خاموش ہوجاتے تھے، کبھی بحث نہیں کرتے تھے۔ مولانا آزادؒ پر کہیں کوئی چیز ان کی نظر سے گزرتی تھی تو اس کی فوٹو کاپی مجھے بھیج دیتے تھے۔ میں لکھنؤ جاتا تو انہیں مطلع کردیتا اور میرا جہاں کہیں قیام ہوتا وہ وہاں آکر مجھ سے ضرور ملتے تھے۔ مجھے ان کا آخری خط جو ۲۵؍ فروری کا لکھا ہوا تھا، ۲۸؍ کو ملا تھا۔ اس میں انہوں نے لکھا تھا: ’’معارف کا فروری ۲۰۰۱؁ء کا شمارہ آپ کو مل گیا ہوگا۔ اس میں اس ناچیز کا ایک مراسلہ شائع ہوا ہے۔ اس مراسلے پر حواشی میں جو باتیں تحریر فرمائی گئی ہیں۔ اس (کذا) سے نفس کی اصلاح کا موقع ملا ہے‘‘۔ ملاحظہ فرمایا آپ نے کس طرح اپنی کوتاہی کا اعتراف کیا ہے۔ میں نے کچھ غلط تو نہیں لکھا کہ کیسے بے نفس انسان تھے۔ اﷲ تعالیٰ مغفرت فرمائے اور درجات بلند کرے۔ بہت جلدی چلے گئے۔
امید ہے...

شاہ ولی اللہ كا نظریہ اخلاق و معاشرت

His distinction was that he reflected over the Islamic system and applied it upon the modem age. He proved that the teachings of Islam cover not only faith, beliefs and rituals of worship but also rule all the aspects of social and moral values of a Muslim. He proved with profound arguments that these fundamental principles prevail and govern the Muslim society and its ethics. Shah Waliullah had a broad vision and a versatile approach towards the different aspects of political, moral and social behaviors. The most important thing about his contributions is that his views are widely accepted and welcomed by the scholars who came after him.

Price and Wage Setting Behaviour of Firms in Industrial Estates of Khyber Pakhtunkhwa, Pakistan

Price and wage setting behaviour is a crucial issue in the economic literature, especially for the knowledge of monetary policy transmission mechanism. The present study analyzes the price and wage setting behaviour of firms from Industrial estates of Khyber Pakhtunkhwa, using survey-based data. The survey is conducted in the year 2017 in four major industrial estates of Khyber Pakhtunkhwa, namely, Hayatabad, Nowshera, Gadoon and Hattar Industrial Estates. A sample of 342 firms is selected through stratified random sampling and respondents are the managers of the firms. Price setting behavior is measured through frequency of price change, length of price contract and importance of demand and cost shocks for price change. The wage setting variable is measured through frequency of wage change. To estimate the effects of determinants of price change/rigidity, models are estimated through ordinary least squares technique in case of frequency of price change as dependent variable while binary logistic technique is used in all other cases. It is found that 70% of the firms have more than five competitors. Most of the firms have only regular customers or a combination of both regular and occasional customers. 60.8% of the firms set the price of their main product, so most of firms operate in imperfectly competitive market structure. 70.8% firms involve in price discrimination, in which 50% of the firms adopt first degree price discrimination. Most of the firms use current information (44%) or a combination of all information (40%) for price-setting of their product, which means that the firms practice is not aligned with traditional Philips curve rather it is consistent with hybrid Philips curve. 26% of the firms in our sample follow time-dependent pricing policy, 21% of the firms follow state-dependent rule and 52.6% firms use a combination of both time and state-dependent pricing policies, i.e. they practice mixed strategy. A relatively high proportion of firms change prices at the change of new calendar year with most of the firms changing prices at the start of fiscal year or calendar year. The most important factors for price stickiness are implicit and explicit price contracts, and minimum price volatility and less uncertainty. Imperfect competitive market structure of firms, number of regular customers, backward-looking behavior, and credibility of central bank and size of the firm are important determinants of price rigidity. While economic literacy and information set regarding expected inflation make the prices flexible. Firms‘ likelihood of price increase higher than that to price decrease in response to both demand and supply shocks. Furthermore, supply-side factors lead to higher frequency of price change than demand-side factors do. The cost of raw material and cost of energy are the most important causes of price change, both for the price increase and decrease. Demand and cost shocks are important determinants of price change for imperfectly competitive firms, backward-looking firms, firms run by managers having more information about economic conditions, while credibility of central bank is important determinant of price change in case of demand shocks only. Size of firms and information set regarding expected inflation do not have any effect. Most of the firms change wage rate once in a year both for permanent workers and daily wagers. Majority of the firms follow time-dependent wage policy. Half of the firms, which are following time-dependent wage policy, change the wage rate at the end or start of the fiscal year. Most of the firms are not found to index wages for permanent workers and daily wagers. Moreover, the percentage of firms not involved in wage indexation is higher for daily workers than for permanent worker. Labor productivity, employment level in the economy, government regulations, taxes, demand for the product, and inflation are important factors of wage change but the most important factor is the labour productivity and least important is pressure from the labour union. Imperfect competition and size of the firms are the important determinants of wage flexibility, because they increase the frequency of wage change, while wage indexation, information set of expected inflation and fringe benefits provided to workers are the important determinants of wage rigidity, because these factors decrease the probability of a firm to change the wage rate. Owing to weak traditional channel of monetary policy, it is important for monetary policy of Pakistan to focus on other channels of monetary transmission mechanism, like asset price channel, balance sheet channel or credit channel; credibility of central bank has to be established to stabilize prices; pre-emptive measures should be taken on the part of central bank to counter supply shocks; wage cuts at the times of recession be avoided; and disinflationary policies be carefully designed as sacrifice ratio, albeit moderate, is not zero.