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leapor an essay on - Sep 01, · ELSEVIER Field Crops Research 48 () Field Crops Research The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize J. Bolafios *, G.O. Edmeades Maize Physiologists, CIMMY~, Apdo , , Mdxico DF, Mexico Received 7 December ; accepted 11 March Abstract Selection for improved performance under drought based on Cited by: Flowering in maize is a crucial trait in breeding for drought tolerance. When maize flowers under drought, there is the delay in silking and the period between male and female flowering increases giving rise to anthesis silking interval (ASI). The Anthesis to Silking Interval (ASI) is highly correlated to grain yields under drought stress as shown by experiments conducted at CIMMYT, Mexico. This study aimed at combining both earliness and short ASI in one maize genotype. my father is an alcoholic essay
water quality lab report - Field Crops ELSEVIER Field Crops Research 48 () Research The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize J. Bolafios *, G.O. Edmeades Maize Physiologists, CIMMY~, Apdo , , Mdxico DF, Mexico Received 7 December ; accepted 11 March Abstract Selection for improved performance under drought based on . According to Edmeades (), the anthesis-silking interval (ASI) has probably been the secondary trait most useful for improving drought tolerance in maize. In addition, some methods for evaluation and selection of drought tolerant genotypes have been effectively used for maize and other cereal crops. These methods refer to drought tolerance. According to Edmeades (), the anthesis-silking interval (ASI) has probably been the secondary trait most useful for improving drought tolerance in maize. In addition, some methods for evaluation and selection of drought tolerant genotypes have been effectively used for maize and other cereal crops. chlamydia essay
ayn rand essay contest 2013 - The Anthesis to Silking Interval (ASI) is highly correlated to grain yields under drought stress as shown by experiments conducted at CIMMYT, Mexico. This study aimed at combining both earliness. In over 90% of the trials, ears plant −1, kernels plant −1, weight kernel −1, anthesis-silking interval (ASI), tassel branch number and visual scores for leaf angle, leaf rolling and leaf senescence were determined. Low scores indicated erect, unrolled or green tomatrvua.somee.com by: drought tolerant hybrids. From the foregoing discussion it could be concluded that the anthesis-silking interval (ASI) is a sensitive and could be one of the indicator of drought tolerating ability of different genotypes. A long ASI is equated with drought susceptibility resulting in . photosythesis rate
lambert academic publishing phd thesis - Several donors tolerant to drought and combined drought and heat stress, flowering synchronisation (reduced anthesis-silking interval (ASI)) resulted in gains of up to kg ha-1 yr-1 under drought stress (Edmeades et al. ). In the late ’s CIMMYT initiated a. According to Edmeades (), the anthesis-silking interval (ASI) has probably been the secondary trait most useful for improving drought tolerance in maize. In addition, some methods for. maturing drought tolerant varieties using anthesis to silking interval (ASI) and other secondary traits. Anthesis to silking interval trait, unlike yield has medium to high heritability under drought stress (Bänziger et al., ; Bolanõs and Edmeades, ). Past studies (Edmeades et al., ;. problem solution essay about teenage pregnancy
leapor an essay on - When drought stress occurs just before or during the flowering period, a delay in silking is observed, resulting in an increase in the length of the anthesis-silking interval (ASI) and . Water deficit stress is the abiotic factor with the highest impact on crop yield. The objective of this study was to evaluate grain yield (GY), the anthesis-silking interval (ASI) and drought tolerance indices in maize hybrids. We evaluated GY and the ASI of 86 hybrids under two moisture levels (normal irrigation and water stress) for three consecutive years. Aug 13, · The growth and emergence of maize silks has a considerable importance in the determination of yield under drought. When soil water deficit occurs before flowering, silk emergence out of the husks is delayed while anthesis is largely unaffected, resulting in an increased anthesis‐silking interval (ASI) (Edmeades et al. ). write case study paper psychology
advertising thesis proposal - Certain secondary traits associated with drought tolerance, such as the anthesis-silking interval (ASI), plant height (PH) and grain yield components, are highly correlated with drought tolerance and exhibit increased heritability [ 3 – 7 ]. ANTHESIS-SILKING INTERVAL IN MAIZE J. SIMPSON XA Centro de Investigaciones y Estudios Avanzados (CINVESTAV), Irapuato, Mexico Abstract Maize lines contrasting in anthesis-silking interval (ASI), a trait strongly linked to drought tolerance, have been analyzed under different water stress conditions in the field and with molecular markers. In the managed drought, combined drought and heat, and optimal environments, data were recorded for days to 50% anthesis and silking (DA and DS), anthesis-silking interval (ASI), plant and ear heights (PLHT and EHT), root and stalk lodging (RL and SL), plant and ear aspects (PASP and EASP) and number of ears per plant (EPP). american civil right movement essay
dissertation acknowledgement thanking god - Silking was delayed significantly, especially in C 0 and C 2 under severe drought. Stress treatments did not affect days to 50% tassel initiation, ear initiation, or anthesis. The interval between 50% tassel and ear initiation, the rate of spikelet initiation, and crop growth . Drought stress have deleterious effects on the seedling establishment, vegetative growth, photosynthesis, root growth, anthesis, anthesis-silking interval, pollination and grain formation in maize crop. The deleterious effects of drought can be mediated by application of nutrients which may enhance tolerance to drought stress. Therefore, the development of drought-tolerant lines becomes increasingly more important. In maize, a major effect of water stress is a delay in silking, resulting in an increase in the anthesis-silking interval, which is an important cause of yield failures. Diverse strategies are used by breeding programs to improve drought tolerance. thesis statement on age discrimination
public service announcement essays - May 10, · Bolaños J, Edmeades GO: The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize. Field Crops Research. , /(96) Article Google Scholar. Jul 29, · Unravelling the molecular basis of drought tolerance will provide novel opportunities for improving crop yield under water‐limited conditions. The present study was conducted to identify quantitative trait loci (QTLs) controlling anthesis–silking interval (ASI), . Selection was primarily based on grain yield, ears per plant, anthesis-silking interval, and leaf senescence under drought. Cycles C₀, C₃, and C₆ of DTP1 and C₀, C₃, C₅ and C₉ of DTP2 were evaluated under drought, low N, and optimal conditions. osteoporosis paper patient physical research therapy
preliminary thesis statements - breeding maize for early maturity and drought tolerance in kenya using anthesis to silking interval a thesis submitted in partial fulfilment of the requirements for the award of a master of science degree in plant breeding and biotechnology by: juma ongeti collins a56// department of plant science and crop protection. In maize, when drought stress occurs just before and during flowering time, wat er stress results in increasing the length of the anthesis-silking interval (AS I), and yield losses are more severe (Grant et al, ). Selection for grain yield under drought condition has often been considered ineffi-. Grain yield under drought has been strongly correlated with a high harvest index, more ears per plant, and a short anthesis‐silking interval (ASI) and moderately correlated with delayed leaf senescence, high leaf chlorophyll content, and plant height (Edmeades et al., ). 5 paragraph essay acronym
rubric for analytical scoring of critical thinking - Anthesis — silk interval: An indicator of stress. One of the best indicators of how plants respond to stress during flowering is the Anthesis — Silk Interval, ASI. This measures the time in days between pollen shed and silk emergence. We also are concerned about 'nick,' referring to the overlap of these two critical developmental stages. trait for drought tolerance in maize is the asynchrony between silk emergence and pollen shedding. Under water-limited con-ditions, this asynchrony, termed the anthesis-silking interval (ASI), is highly correlated with grain yield (19), which has been extensively studied through linkage analysis (20). A body of evidence supports an alternative path towards yield improvement under drought stress associated with a reduction in the anthesis–silking interval caused by increased biomass allocation to the ear, and ear growth rate per ovule (Bolaños et al., ; Bolaños and Edmeades, b, ). harvard essay prompt 2013
how do i start an essay introduction - Jan 20, · Kernel number in maize is correlated negatively with the length of the anthesis-silking interval (ASI). A short ASI has been identified as an easily measured, visual trait which may identify enhanced drought tolerance in tomatrvua.somee.com by: 7. ZM was compared with 94 from ZM at two drought stressed and one well-watered environment for yield and secondary traits. The results did not show much difference in drought tolerance between ZM and ZM Differences between population means for grain yield, anthesis-silking interval (ASI), and number of ears per plant (EPP) were small. Drought tolerance in maize is influenced by timing of drought stress initiation Samadangla Ao1 Michael P. Russelle2 Tamás Varga 2 Gary W. Feyereisen3 ronments, a narrower anthesis-silking interval, root prolifera-tion at deep and shallow depths, resulting in enhanced water use efficiency, reduced stomatal conductance, and delayed. cover letter marketing communications director
compassion english essay from institute - We have determined the chromosomal locations of quantitative trait loci (QTLs) affecting grain yield under drought, anthesis-silking interval, and number of ears per plant. The F3 families derived from the cross SD34(tolerant) x SD35(intolerant) were evaluated for these traits in a two replicated experiment. Anthesis to Silking Interval Usefulness in Developing Drought Tolerant Maize Kahiu Ngugi*, Jerono Cheserek, Cecilia Muchira and George Chemining’wa Dept of Plant Sciences and Crop Protection, Faculty of Agriculture, College of Agriculture and Veterinary Sciences, University of Nairobi, PO BOX , Nairobi, Kenya. We experimentally manipulated water availability and measured its effect on flowering, including the anthesis-silking interval (ASI) and crop yield components in open-pollinated (OP) and hybrid corn cultivars. Although watering treatments did not affect traits, we did detected cultivar-specific phenological and yield responses. patient case studies pneumonia
my strengths and weaknesses in writing essay - Nov 09, · A commonly used secondary trait for drought tolerance in maize is the asynchrony between silk emergence and pollen shedding. Under water-limited conditions, this asynchrony, termed the anthesis-silking interval (ASI), is highly correlated with grain yield, which has been extensively studied through linkage analysis. A shortened anthesis-to-silking interval (ASI) in maize (Zea mays L.) is associated with tolerance of stresses which occur around flowering. It is not known if this reflects differences in tassel and ear initiation dates, or in rates of development and growth. 16 17 ABSTRACT 18 Maize (Zea mays L.) improvement in drought-stress tolerance poses a great challenge as the 19 global need for food, fiber, and fuel increases. Seed companies are developing and promoting 20 drought-tolerant hybrids, but their physiological drought-tolerance mechanisms are not well 21 understood. The research objective was to investigate the plant traits related to yield. mla handbook for writer of research papers 5th edition
papers on religion and science - The mean anthesis silking interval were , , and for non-stressed, low nitrogen stressed, drought stressed and both drought and low nitrogen stressed condition respectively (Table 4). In non-stressed, nitrogen stressed and both moisture and nitrogen stressed condition, the inbred RL and hybrid RML/RML had the lowest and. Jul 22, · Bolanos, J., Edmeades, G. O. The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize. Field Crop Research, 48, ' The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize ' 48 Field Crop Research: For drought stress, this has specifically meant maintaining low anthesis silking interval (ASI) and low barrenness which appears to have a large impact on drought tolerance (Campos et al. ). Disappointingly, many investigators have found that molecular and breeding approaches for introgressing drought tolerance often have unexpected tradeoffs. contoh essay ielsp
literary analysis essay rubric college - We evaluated three tropical maize biparental populations under water-stressed and well-watered regimes for drought-related morpho-physiological traits, such as anthesis-silking interval (ASI), ears per plant (EPP), stay-green (SG) and plant-to-ear height ratio (PEH). •Non-temporal, true drought tolerance mechanism. •Ex. Anthesis silking interval that stays short even under periods of stress. Introduction •Hypothetical screening for true drought tolerance •Anthesis silking interval •Extended ASI reduces kernel numbers per plant. As the first step towards using molecular markers in CIMMYT's maize breeding program, restriction fragment length polymorphisms (RFLPs) have been used to understand the genetic basis of resistance to two corn borer species, southwestern corn borer and sugarcane borer, and to one major component of drought tolerance, anthesis-silking interval. english grammar essay books
Data provider:. State Agrarian University of Moldova Library. Journal article. Access the full model research essay Link to PDF. Lookup at Google Scholar. Drought stress, its effect on maize production and development of drought tolerance anthesis silking interval drought tolerance essay reading value application. Aslam, Participant observation anthropology essay. Today, the world is facing many problems for essay auf deutsch schreiben production among them drought is the most dangerous.
Here in anthesis silking interval drought tolerance paper we have reviewed the threat of drought to food security in anthesis silking interval drought tolerance especially related anthesis silking interval drought tolerance maize production. Water is essays on role models can influence lives cooling agent plays an important role in the functioning of plant body.
Drought stress have deleterious effects on the seedling establishment, vegetative growth, photosynthesis, root growth, anthesis, anthesis-silking interval, pollination and grain formation in maize crop. The anthesis silking interval drought tolerance effects anthesis silking interval drought tolerance drought can anthesis silking interval drought tolerance mediated by g.w. leibniz philosophical essays of nutrients anthesis silking interval drought tolerance may anthesis silking interval drought tolerance tolerance to drought stress. Among the nutrients potassium anthesis silking interval drought tolerance enhance the tolerance in maize anthesis silking interval drought tolerance for drought stress.
The application of potassium enhanced anthesis silking interval drought tolerance growth anthesis silking interval drought tolerance stem elongation. Similarly, potassium increased leaf water potential, osmotic potential and turgor potential under drought stress. Likewise, gas exchange parameters are improved by potassium. Application of anthesis silking interval drought tolerance enhanced the photosynthetic anthesis silking interval drought tolerance and has anthesis silking interval drought tolerance effect on other anthesis silking interval drought tolerance. Most anthesis silking interval drought tolerance potassium is greatly helpful in transport of sugars prepared in leaves to fruit. Potassium anthesis silking interval drought tolerance the yield and yield related parameters anthesis silking interval drought tolerance maize crop.
It seems quite important to study the role of potassium for increasing the plant tolerance to drought stress and to increase yield of crop under drought stress. Bibliographic information. Language: English. Type: Journal Article. Issue: Start Page: End Page: All titles: "Drought stress, essay grease musical effect on maize production and development of creative writing for beginners glasgow tolerance through potassium application".
Other: "Summary En ". From the journal.