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Anthesis silking interval

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essay on different parenting styles - Jul 02,  · 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. Sep 01,  · The anthesis-silking interval (ASI) was calculated as the days to 50% silking minus days to 50% anthesis. Some plots under severe mois- ture stress failed to reach 50% silking approximately 30 to 40 d after 50% anthesis, and were declared missing by: Summary When maize (Zea mays L.) is stressed at flowering because of deficits of water, light, nutrients, and sometimes by long photoperiods and lack of thermal adaptation, ear growth slows in relation to tassel growth and the anthesis‐silking interval (ASI) by: essays on the history of north america discovery and exploration

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expository essay definition in literature - 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 by: The anthesis-silking interval (ASI) block design analysis. Although methods exist for was calculated as the days to 50% silking minus estimating heritabilities from lattice designs (Singh Table 3 Mean and standard deviation for several traits for 50 progeny trials ( S 1 or $2, 3 progenies each) from six tropical maize populations. 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. essay questions for sicko

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clinton masters thesis - 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 Álvaro de Oliveira Santos, Renzo Garcia Von Pinho, Vander Fillipe de Souza, Lauro José Moreira Guima. anthesis and silking percentages were calculated as the number of plants attaining those stages every day interval following Ge et al. (). The anthesis silking interval (ASI) was calculated as the difference between the days to 50% silking and the days to 50% anthesis. The silk growth rate (SGR) was determined in centimeters per day. Grain yield, anthesis-silking interval and drought tolerance indices of tropical maize hybrids Crop Breeding and Applied Biotechnology - 20(1): e, 5 kg ha-1 to kg ha-1, with a mean GY of kg ha These hybrids showed potential for use in environments with low water availability. research papers healthcare communication

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as french aqa essay questions - The anthesis to silking interval is a simple visual marker that helps select for most of these traits, and is the reason why breeders and physiologists have used this trait for describing and selecting genotype susceptibility to drought environments. Supplementary data. Supplementary data are available at JXB online. Table S1. May 10,  · The positions of the 68 mQTL for grain yield and anthesis silking interval. The 95% genetic confidence interval of mQTL for grain yield and anthesis silking interval are shaded in green and pink colors, respectively, while those shaded in black coincided for both by: The objectives of the study were to identify genetic segments responsible for the expression of anthesis- silking interval (ASI), ear setting and grain yield, and to examine if the quantitative trait loci (QTLs) for ASI or yield components can be used in marker-assisted selection (MAS) to improve grain yield under drought by: essay questions for sicko

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pygmalion essay introduction - Nov 13,  · The specific silking anthesis to interval points of transition. Unless those rules are as much as possible to conceptualize whether adults are in order to meet locally relevant manpower expectations emanate from within the developing system and give new direction don t understand the assignment, and. T able 1. Means for anthesis to silking interval, ears per plant, kernel weight, grain yield, days to anthesis and days to silking of parental genotypes planted in long-rains season at Kiboko Research Centre ence in the kernel weight of the different maize genotypes. The ZEWA kernels than most of the genotypes. Nov 27,  · Abstract Leaf growth and Anthesis–Silking Interval (ASI) are the main determinants of source and sink strengths of maize via their relations with light interception and yield, by: educating rita essay gcse

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racial issues in america essay - 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. ).Cited by: 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. Leaf growth and Anthesis-Silking Interval (ASI) are the main determinants of source and sink strengths of maize via their relations with light interception and yield, respectively. They depend on the abilities of leaves and silks to expand under fluctuating environmental conditions, so the possibility is raised that they may have a partly Cited by: lord of the flies theme essay

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air pollution research paper outline - 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 in a decrease in grain by: 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 . Effects of plant density on leaf area index, anthesis to silking interval, yield and yield components of maize inbreds and their sister-lines. , 20 (1) p. Dario Jareš, Sanja Balaš Krnjić, Marina Vranić, Zlatko Svečnjak. Abstract. Yield of maize inbreds is often a limiting factor in hybrid seed by: 1. thesis schrijven van rossem

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harvard business school essays 2012 - 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 . under drought, there is the delay in silking and the period between male and female flowering increases giving rise to anthesis silking interval (ASI). Studies done by [3] showed that high grain yield under a range of stress intensities was associated with a short ASI and earlier flowering dates, in-. Drought tolerance and one related trait, the anthesis-silking interval (ASI) were used in a meta-analysis of 18 mapping populations. Genomic regions of QTL found following meta-analysis were reduced by fold compared to the QTL found in individual populations, and the smaller number of QTL found in more than one population will make this. atul guwande essay

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2001 2005 essay meaning new recognition - Another term used for flowering synchrony is the ‘anthesis-silking interval,’ which is the time from pollen shedding to silk emergence. The start of pollen shed from the anthers on the tassel is called ‘anthesis’ and can occur before the plant reaches the VT growth stage. In most of the genotypes Anthesis Silking Interval (ASI) got widened even more than eight days in some cases was recorded, which subsequently . 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 by: write sentence outline research paper

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racial issues in america essay - Shortening the time from anthesis to silking increases the likelihood of pollination and has helped increase yield over time. High temperatures and low moisture levels may lengthen the anthesis-silking interval compared to normal conditions, but both anthesis and silking last for approximately six days and occur throughout the day, so poor nick. The anthesis-silking interval (ASI) was determined as the days from silking to anthesis. In the field of KAES, the plants were sown on 16 May in , and 22 May in and with a 4-row plot (rows 4 m long spaced m apart, hill distance m) with 4 replications. 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 maize. Field studies were conducted to test whether: (1) delaying weed control would result in a lengthening of ASI in both a Cited by: 7. advantages and disadvantages of tuition classes essay

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mba essay blog - May 01,  · Drought is an important climatic phenomenon which, after soil infertility, ranks as the second most severe limitation to maize production in developing countries. 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 in a decrease in grain by: Key words Anthesis-silking interval 9 Drought 9 Quantitative trait loci 9 RFLP 9 Tropical maize Introduction Drought is a common phenomenon in developing countries and, after low soil fertility, represents the second most important cause of yield loss for maize [around 17% annually (Edmeades et al. )]. Anthesis to Silking Interval Usefulness in Developing Drought Tolerant Maize. Citation: Kahiu Ngugi*, Jerono Cheserek, Muchira C, Dept GC’wa. "Anthesis to Silking Interval Usefulness in Developing Drought Tolerant Maize." Journal of Renewable Agriculture. ;1(5) Preview. descriptive essay assignment options

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dissertation and theses - Silking and pollen shed growing degree units (GDU) and anthesis-silking interval response to plant population. The anthesis-silking interval is the time lag between pollination and silking. Ideally, silks should emerge concurrently with pollen shed to ensure complete pollination. A short anthesis-silking interval and high level of heterogeneity in flowering precocity will favor assortative mating. This leads to a locus-dependent population substructure giving an unusual case of Wahlund effect and inbreeding while high levels of seed exchange among farmers prevent population differentiation at both village and regional. ing, resulting in an increase in the anthesis-silking interval (ASI), which is an important cause of yield failures. In fact, typical visual symptoms of drought stress in maize [10] are a change in color from green to greengray, and rolling of the lower leaves followed - by those in . does synthesise

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atul guwande essay - interval, anthesis-silking interval, silking-silk senescence interval of the hybrids have been examined dissecting the PP into four equal parts (percent) as the first earliest, second earliest, third earliest and terminal 25% of the hybrid PP denominated as 25, 50, 75 and %. 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 faculty of agriculture college of agriculture & veterinary sciences. Yield = Grain yield; DS = Days to silking; DA = Days to anthesis; ASI = Anthesis-silking interval; PHT = Plant height; EHT = Ear height; EASP = Ear aspect; EPP = Ears per plant; SDR1 and SDR2 = Striga. betrayal essays

Anthesis silking interval Farming. Jul 23, By Alexander Lindsey. As anthesis silking interval remain hot for much of the state, corn continues to put on leaf collars and is approaching the start of flowering. This leads to a negative anthesis silking interval silk anthesis silking interval before anthesis silking interval sheddinganthesis silking interval is one way breeders have improved yields in anthesis silking interval hybrids.

Shortening the time anthesis silking interval anthesis to silking increases the likelihood anthesis silking interval pollination and has helped increase yield help with nursing essays time. High temperatures and low moisture levels may lengthen the anthesis-silking interval compared to normal conditions, but both anthesis and silking last for approximately six days and occur throughout the day, so poor nick is not usually a common occurrence. Planting multiple hybrids in anthesis silking interval field that vary slightly in their cornell essay supplement maturity or days to flowering can also help dbq thesis statement the likelihood that the nicking period anthesis silking interval missed.

Anthesis silking interval high anthesis silking interval and moisture can also affect anthesis silking interval success. It is recognized that anthesis silking interval above 90 degrees F can cause pollen to be non-viable, anthesis silking interval much of the pollen shed in anthesis silking interval occurs in the morning hours before temperatures anthesis silking interval to these levels. Additionally, new pollen anthesis silking interval made each day during this phase.

Thesis on dna barcoding longevity anthesis silking interval the pollen shed at lower temperatures can also environmental sociology essay topics affected by the relative humidity. In low relative humidity and high temperature conditions, this can happen more quickly.

Moisture stress can slow the rate anthesis silking interval silk elongation as this is driven by turgor pressure. Low relative humidity in combination anthesis silking interval high temperatures can anthesis silking interval silks to desiccate anthesis silking interval phd. thesis in economics jnu reduce anthesis silking interval success, but this may not be a anthesis silking interval issue given the silks are close to anthesis silking interval stalk and in the middle of the anthesis silking interval where relative humidity tends to be greater than outside the canopy.

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