Drought stress has detrimental effects on the seedling development, vegetative/ reproductive growth, photosynthesis, root proliferation, anthesis, anthesis-silking interval (asi), pollination and grain yield in maize typically, two weeks before silking through pollination are an important time in maize life here we reviewed the. Theor appl genet 1996 may92(7):905-14 doi: 101007/bf00221905 identification of quantitative trait loci under drought conditions in tropical maize 1 flowering parameters and the anthesis-silking interval ribaut jm(1), hoisington da, deutsch ja, jiang c, gonzalez-de-leon d author information: (1)cimmyt, apartado. Similarly, pahari and iqbal showed highly significant difference for days to anthesis, days to silking, days to maturity and grain yield minimum (57 days, 59 days, 2 days and 94 days) days to anthesis, days to silking, anthesis to silking interval (asi) and days to maturity was recorded by azam-3, azam-5, azam-1 and azam-4. Maize, drought tolerance, anthesis-silking interval, qtl analysis, ssr, mas 1 summary introduction: drought is an important climatic phenomenon, which is the second most severe constraint to maize production in developing countries, after low soil fertility maize (zea mays l) is particularly sensitive. Summary among the agronomically important grasses, maize is the most susceptible to drought at flowering drought stimulates a protandrous pattern of development, increasing the anthesis-silking interval because maize has a short period of flowering and pollen remains viable for only a short period of time, each day. Drought-induced changes in anthesis-silking interval are related to silk expansion: a spatio-temporal growth analysis in maize plants subjected to soil water deficit avan fuad-hassan, françois tardieu & olivier turc inra and montpellier supagro, umr 759 laboratoire d'ecophysiologie des plantes sous. 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 early-maturing, open pollinated varieties (opvs) from kenya agricultural research. 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) increases this ap- pears to be a general response by the plant to a reduction.
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 leaves canopy temperature, leaf chlorophyll concentration and. Aerial growth and subsequently caused a slight delay in anthesis and silking in pioneer 30b80 albeit the plant and silk growth rates during the bracketing- flowering stage were higher in pioneer 30b80 (even under combined stresses, which shortened the anthesis-silking period and interval (asi) that caused more kernel. Which, after soil infertility, ranks as the second most se- vere limitation to maize production in developing coun- tries 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 yield.
The 184 f3 families were evaluated in the field under well-watered and drought- stressed regimes in shanxi province of china the objectives of the study were to identify genetic segments responsible for the expression of anthesis- silkinginterval(asi), ear setting and grain yield, and to examineif the quantitative trait loci. 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, respectively they depend on the abilities of leaves and silks to expand under fluctuating environmental conditions, so the possibility is raised that they.
2012 to expose flowering to the natural winter in subtropical foot plain of himalaya for flowering behavior emergence of tassel, anthesis, silking, silk senescence, tassel-anthesis interval, anthesis-silking interval, silking-silk senescence interval of the hybrids have been examined dissecting the pp into four. The results obtained revealed no significant difference among the genotypes however, the genotypes showed a good response to leaf temperature, canopy temperature, stomatal conductance and chlorophyll content variability was observed in three traits days to anthesis, silking and anthesis silking interval there was a. Full-text paper (pdf): anthesis to silking interval usefulness in developing drought tolerant maize.
Et al (1993) by considering plant traits involved with leaf expansion, leaf 113 senescence, stem extension, canopy temperature, anthesis-silking interval, leaf 114 number, and chlorophyll concentration rasmussen (1991) reported that plant 115 breeders can modify traits that appear to affect yield, such as maturity, height. Term name, anthesis silking interval term accession, to:0000463 aspect, plant_trait_ontology synonyms (3), antskit, asi, flwslkinter definition, a difference of the average number of days between the maize tassel flowering and the first visible silk (stigma) on the maize ear comment, none. By roger w elmore, department of agronomy forecast daily high temperatures every day this week hover just below 100 degrees across iowa corn ranges from the 10th leaf stage (v10) to tasseling and silking (vt and r1) as of july 1st, the usda reports that 16 percent of iowa's corn was silking that's. 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 conventional breeding has improved the drought tolerance of temperate maize.
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 leaves canopy temperature, leaf chlorophyll. Population means for grain yield, anthesis-silking interval (asi), and number of ears per plant (epp) were small frequency distributions for asi and leaf rolling were different for the two populations however, zm601 had more lines with shorter asi and less leaf rolling as compared to zm607 broad sense heritability of asi. Drought has deleterious effect to plant growth including maize (zea mays l) such as vegetative and/or reproductive growth, root extension, photosynthesis efficiency, flowering, anthesis-silking interval (asi), fertilization, and grain filling in this study, we screened drought tolerant maize in 21 cultivars from different sources,.
Abbreviations: asi, anthesis-silking interval das, days after sowing ls, leaf stage at the start of the treatment rtl, relative tassel length barrenness and changes in tassel development and flowering habit of hybrid maize associated with low air temperatures taku hayashi1, tsukasa makino1, narichika sato1 and. Anthesis–silking interval (asi), tassel size scores, and barrenness changes in leaf angle scores and stay green scores have been implicated as determinants of increased radiation use efficiency and water capture (hammer et al 2009a messina et al 2009) increased kernel number per unit area via reduced barrenness. A field experiment was conducted on maize hybrids (bio-9681 and pro-311) to illustrate the effect of phosphorus (p) on physiological growth analysis traits, anthesis-to-silking interval (asi) and its correlation with yield hybrids were sown with two soil phosphorus (p) levels, viz, 60 and 0 kg ha −1 , corresponding to soil p.
Maize, the most important staple crop in kenya, is affected by drought stress at flowering period leading to low yields past studies at cimmyt have demonstrated that a short anthesis to silking interval (asi) is an important component of drought tolerance in maize in this study, one hundred and thirty five f2f3 progenies. 1, february 2016 wwwj-tropical-cropscom 15 evaluation of yield components of new sweet corn hybrids plant height, number of ears per plant, sugar content, and ear yield without husk (table 1) genotypes did not affect stem diameter, leaf length, leaf width, anthesis and silking interval (asi), days to harvesting. Anthesis-silking interval (asi) under drought has become shorter in modern hybrids, and selection has possibly led to an increase in the growth of spikelets and ears and a reduction in final spikelet number (bänziger et al, 2000) moreover, “stay-green” or a reduction in the rate of leaf senescence during grain filling has.