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Home > Qtls Conferring Root Architecture in an Interspecific Gossypium Hirsutum X Gossypium Barbadense Population

Qtls Conferring Root Architecture in an Interspecific Gossypium Hirsutum X Gossypium Barbadense Population

Thesis Info

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Author

Muhammad Babar

Program

PhD

Institute

Quaid-I-Azam University

City

Islamabad

Province

Islamabad.

Country

Pakistan

Thesis Completing Year

2009

Thesis Completion Status

Completed

Subject

Applied Sciences

Language

English

Link

http://prr.hec.gov.pk/jspui/handle/123456789/332

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727051210

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Genetic modification of the rooting system may lead to more drought tolerant upland cotton. A number of different root and physiological traits have been suggested as important mechanism of drought tolerance of cotton. This study was conducted to identify and map quantitative trait loci (QTLs) conferring root architecture in an interspecific cross Gossypium hirsutum x Gossypium barbadense population. An F 2 population was developed which differed greatly in root characteristics. A genetic map covering 3190.50 cM, with 219 marker loci and 26 linkage groups, was constructed by using this F 2 population. The Two F 2 populations were grown in tube and pots experiments. Tap root traits (length, weight, and lateral root numbers) were evaluated. QTL analysis via composite interval mapping detected 17 QTLs, for three root traits including 3 QTLs for fresh root weight, 6 QTLs for lateral root numbers, and 2 QTLs for tap root length in tube experiment, while in pot experiment, 3 QTLs for fresh root weight and 3 QTLs for lateral root numbers were identified. Individually the QTLs accounted for 11-28% of phenotypic variation. Common QTLs were indentified for fresh root weight and lateral root numbers on chr. 18 & chr. 25 respectively, in both pot and tube experiments. The QTLs for root traits, firstly detected in Gossypium, may provide a basis for marker-assisted selection to improve productivity in root-crop breeding.
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چودھری خلیق الزماں

چودھری خلیق الزماں
افسوس ہے کہ گزشتہ مہینہ چودھری خلیق الزماں مرحوم کا کراچی میں انتقال ہوگیا، مرحوم ان لوگوں میں تھے جن کی پوری زندگی سیاسی اور قومی کاموں میں گزری، سیاست کا چسکا ان کو طالب علمی ہی کے زمانہ سے تھا، چنانچہ جنگ بلقان کے زمانہ میں ہندوستان سے جو طبی وفد ڈاکٹر انصاری مرحوم کی قیادت میں ٹرکی گیا اس میں جو نوجوان شامل ہوئے تھے ان میں ایک چودھری صاحب بھی تھے، کئی مرتبہ لکھنو میونسپلٹی کے چیرمین ہوئے ان کی چیرمینی کا دور ایک یادگار دور تھا، اسی زمانہ میں خلافت اور ترک موالات کی تحریک شروع ہوئی، اس میں اس سرگرمی سے حصہ لیا کہ صوبے کے لیڈروں میں ان کا شمار ہونے لگا، ایک مدت تک کانگریس میں رہے، پنڈت موتی لال کے معتمد علیہ اور جواہر لال کے خاص رفقاء میں تھے، کانگریس میں بھی نمایاں مقام حاصل کیا، چنانچہ ۱۹۲۹؁ء میں جب کانگریس کے لیڈروں کی گرفتاری کا سلسلہ شروع ہوا تو آخر میں ان کو کانگریس کا ڈکٹیٹر مقرر کیا گیا تھا۔
پھر مسلم لیگ میں شامل ہوگئے اور پاکستان کی تحریک میں چند دنوں میں آل انڈیا لیڈر کی حیثیت حاصل کرلی چنانچہ پاکستان کے بانیوں میں ان کا شمار ہوتا ہے، قیام پاکستان کے بعد کراچی چلے گئے، یہاں بھی ان کو بڑے بڑے عہدے حاصل ہوئے مختلف اوقات میں مسلم لیگ کے صدر مشرقی پاکستان کے گورنر اور انڈونیشیا کے سفیر مقرر ہوئے مگر مسٹر جناح ان سے خوش نہ تھے اس لئے وہ پاکستان کی سیاست پر اثر انداز نہ ہوسکے اور آخر میں گوشہ نشینی کی زندگی اختیار کرلی تھی اور اسی پر ان کا خاتمہ ہوا، چودھری صاحب کی زندگی قلندرانہ تھی، وہ وکیل تھے، ان کے ماموں اور خسر مولوی محمد نسیم صاحب لکھنو کے چوٹی کے وکیل اور...

Frequency and Psychosocial Determinants of Gender Discrimination Regarding Food Distribution among Families

Due to male dominance in society as well as in households, the rights of females are ignored. Hence, there exists gender discrimination while giving food to family members which in turn results in poor health status for females. Therefore, it is important to explore the causes of this unequal distribution of food among family members Objective: To determine psychosocial factors causing gender discrimination regarding food distribution among families Methods: Data collected from fifty females aged 15-80 years, selected from the urban community using non-probability consecutive sampling, were used for analysis. Females with malnutrition, psychological disorders, with laparotomy and major surgery were excluded. Gender discrimination was assessed as males or male children were preferred for better and more food items like fresh food, meat, fruits, milk, dairy products and multivariate logistic regression analysis was done to see the impact selected factors on gender discrimination Results: The large family size (> 6 members) showed significantly higher odds of discrimination (OR=3.89; 95% CI= 1.03-15.26) than smaller families. The odds of food discrimination were 4 times more for the families, with males being earning hand (OR=4.57; 95% CI= 1.19-18.31). Similarly, there exist higher odds of gender discrimination in low-income families (OR=5.10; 95% CI= 1.18-23.87). While maternal education reduces the chances of food discrimination (OR=0.10; 95% CI= 0.02-0.42)  Conclusions: Psychosocial factors such as large family size, low monthly income, males being earning hand and maternal education were found to be associated with gender discrimination regarding food distribution among family members.

Comparative Study of Treated and Untreated Wastewater on Morpho-Anatomical, Chemical and Essential Oil Contents of Fragrant Rosa Species in Peri-Urban Area

The work was carried out to assess the effects of treated and untreated wastewater on morpho-anatomical, physio-chemical and essential oil contents of four widely cultivated fragrant Rosa species of Pakistan during 2012 and 2013 in peri-urban area. Water analysis showed that all minerals and chemicals were in permissible level in canal water and treated wastewater whereas, untreated water contained higher EC, BOD, COD and heavy metals like Cd, Co, Cu, Pb. Morphological studies showed that treated wastewater has a pronounced effect on floral attributes of Rosa species. Rosa Gruss-an-Teplitz produced the maximum number of flowers per plant, increased bud and flower diameter, number of petals per flower and took minimum days to produce flowers. Whereas, plant height and number of leaves per branch was high in R. bourboniana and leaf area was found maximum in R. damascena. Anatomical study showed that R. Gruss-an-Teplitz showed remarkable variations in root anatomical characteristics under treated wastewater. A significant variation was recorded in R. Gruss-an-Teplitz in terms of large cortical cell area, large vascular bundle area, large xylem and phloem area, large pith area and large cross sectional area while thick epidermis and large metaxylem area was recorded in R. bourboniana. Stem anatomical characteristics showed that large cortical cell area was recorded in R. damascena under untreated wastewater treatment and R. Gruss-an-Teplitz showed thick epidermis and large xylem area in untreated and treated wastewater respectively whereas R. bourboniana showed large pith area in treated wastewater. Rosa Gruss-an-Teplitz showed significant variations in leaf characteristics under treated and untreated wastewater treatment such as, large cortical cell area, vascular bundle area, large spongy cell area and thicker midrib whereas a remarkable increase in epidermal thickness was recorded in R. centifolia. Large palisade cell area, large phloem area and thick leaves (lamina) were found in R. damascena in treated wastewater. Physiological attributes revealed that in treated wastewater, high photosynthetic rate, transpiration rate and chlorophyll content of R. bourboniana was recorded and stomatal conductance was high of R. Gruss-an-Teplitz. Minerals and other chemicals concentration of all plant parts were highest under untreated wastewater. Higher nitrogen contents were found in roots of R. bourboniana; R. centifolia’s roots contained maximum Ca, Na, Zn, Cu, Cr, Ni and Co concentration while roots of R. damascena retained maximum K and Pb level whereas, P and Fe contents were highest in roots of R. Gruss-an-Teplitz. In stems, N, K and xv Fe contents were higher in R. Gruss-an-Teplitz, Na level was maximum in R. bourboniana. P, Ca, Cu and Cr contents were highest in R. centifolia whereas, Zn, Pb, Cr, Ni and Co contents were high in stems of R. damascena. In leaves, N and Na level was high in R. bourboniana while P, Ca, Fe, Zn and Ni contents were highest in R. Gruss-an-Teplitz. K and Pb level was high in leaves of R. damascena whereas Cu, Cr and Co contents were high in R. centifolia. In flowers, R. bourboniana contained high concentration of N and Na while P, Cu and Co contents were high in R. centifolia. Calcium and Zn level was at the top in leaves of R. Gruss-an-Teplitz whereas K, Fe, Pb, Cr and Ni contents were high in flowers R. damascena. Lead was the only chemical whose concentration was high in flowers of R. centifolia and R. damascena under untreated wastewater than the maximum recommended values set by WHO while other minerals and chemical levels were in permissible limit. Out of 12 essential oil components found in this study, citronellol which is the principal constituent for fragrance was highest in essential oil of R. damascena under untreated wastewater while its percentage was lowest in R. Gruss-an-Teplitz. Phenyl ethyl alcohol was main component of essential oil and its percentage was highest in R. Gruss-an-Teplitz under treated wastewater and minimum level was found in R. damascena. The other components of essential oil of all Rosa species were found in traces under all irrigation water treatments. Although statistically no significant effect of irrigation water treatments on oil components was observed however, there was quantitative difference in chemical composition and aroma constituents of essential oil of all fragrant Rosa species. From the results of present studies, it can be concluded that R. Gruss-an-Teplitz showed high degree of tolerance against contaminated water and is strongly recommended to cultivate in peri-urban areas. Moreover, treated wastewater can serves as an alternative source of canal water after management of toxic elements to save water and environment.