Anthesis silking interval corn
This is because the anthesis-silking interval is a prediction of seed set in many maize varieties when under stress at flowering (edmeades, bolanos, elingo, banziger & westgate, 2000. When combined with heat stress this delay could result in poor anthesis silking interval (asi) water stress during pollination (tasseling through silking) not only delays silking, but also reduces silk elongation, and if severe, impedes embryo development. The interval is the difference in days between anthesis (also knowns as tassel emergence or pollen shed) and silking (or emergence of silk from the ear) heat and moisture stress is typical during august in ohio, which could delay both tassel and silk emergence and decrease pollination and yield (cicchino et al, 2010 edreira et al, 2011. Silk elongation requires high water potential ― drought stress can delay silking and increase the anthesis-silking interval (asi) ― the time between the start of pollen shed and silk emergence silks that emerge after most of the pollen is shed may not be pollinated.
Water deficit at tassel initiation increased anthesis-to-silking interval (asi) for 3 and 2 days in ki3 and ki11, respectively, while water deficit at anthesis increased asi for only 125 and 075 days in ki3 and. Insects and drought cause severe losses in the production of maize in many developing countries conventional breeding efforts to enhance the level of resistance to a number of insect pests and tolerance to drought have been successful, although only through large efforts of many breeders and over a large period of time. Drought stress can delay silking, which increases the asi (anthesis-silking interval) and some silks may not get pollinated this causes poorly filled tips drought stress after pollination can also cause kernel abortion through reduced photosynthesis and carbohydrate availability. Nested association mapping (nam) is a technique designed by the labs of edward buckler, james holland, and michael mcmullen for identifying and dissecting the genetic architecture of complex traits in corn.
Other objectives were to detect qtl in the same population for plant height, female flowering, and the anthesis-silking interval (asi) a population of 472 f 2 individuals derived from a cross between the susceptible line ki3 and the resistant inbred cml139, was restriction fragment length polymorphism (rflp) genotyped using 110 maize probes. 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. 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.
One key timeframe to watch is the anthesis-silk interval, or the time between pollen shed and silk emergence while that time window is optimally as small as possible, corn plants influenced by the presence of weeds in the hours and days after planting often have a wider anthesis-silk interval that can influence pollination. 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  are a change in color from green to greengray, and rolling of the lower leaves followed . Modern hybrids have vastly improved anthesis-silk interval (the time between midpollen shed and midsilk), hoegemeyer says “regardless, in some dryland (nonirrigated) fields, we see seed set problems because of nick problems between pollen and silking. The pollination period, the flowering stage in corn, is the most critical period in the development of a corn plant from the standpoint of grain yield determination stress conditions (such as hail damage and drought) have the greatest impact on yield potential during the reproductive stage this. Modern hybrids have vastly improved asi or anthesis-silk interval (the time between mid-pollen shed and mid silk) regardless, in some dryland fields we see seed set problems because of nick problems between pollen and silking.
Vyn found that the anthesis-to-silking interval is crucial to the final grain yield basically, if you have plants that have been dominated by their neighbors, they will tend to shed pollen on time, but they will have a very delayed emergence of the silk, he said. Length of the anthesis-silking interval (as i), and yield losses are more severe (grant et al, 1989) selection for grain yield under drought condition has often been considered ineffi-cient because of the low heritability especially as yield de-creases (blum, 1988) under these conditions, selection for. 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 values. Many of the drought tolerant hybrids are able to avoid yield losses by maintaining a short time interval between anthesis and silking even under water stress however, the overall yield performance of both drought tolerant and non-drought tolerant varieties will depend on other factors such as plant populations and root morphologies.
Anthesis silking interval corn
Under combined stresses, which shortened the anthesis-silking period and interval (asi) that caused more kernel setting than suwan 4452), pioneer 30b80 failed to complete 100% silking under pbd silking was more affected than anthesis by both stresses especially under pbd. Evaluated the accuracy of prediction for three corn ﬂow-ering traits days to silking, days to anthesis, and anthesis-silking interval with gws based on cross-validation experiments using a large data set of 25 nested association mapping populations in maize (zea mays) we found that. This shorter anthesis silking interval may mitigate the impact of drought stress during pollination for more on the pollination process in corn check out the following abendroth, lj, rw elmore, mj boyer, and sk marlay 2011. Anthesis-silking interval, leaf area index, leaf chlorophyll content, leaf temperature, photosynthesis, transpiration, leaf stay green, and root length density these data will be.
- Anthesis-silking interval was calculated for individual plants using the following formula (see bolaños and edmeades 1996): at physiological crop maturity (ie, appearance of black layer within the seed), all remaining aboveground biomass of each selected plant was harvested and separated into ears and stover (ie, stems and leaves.
- Then, too, heat, combined with lack of water, has devastating effects on silking if plants are slow to silk, the bulk of the pollen may already be shed and gone modern hybrids have vastly improved anthesis-silk interval (the time between midpollen shed and midsilk), hoegemeyer says.
Maize, the most important stable crop in kenya is affected by drought stress mostly at flowering stages causing delay in silk emergence the anthesis to silking interval (asi) is highly correlated. Studies were conducted in 2011 and 2012 to determine if narrow row corn (zea mays l) and/or greater plant populations could affect yield, time to silking, and other physiological characteristics main plots of six hybrids were arranged as a randomized. 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 nearly 2 weeks ahead of normal unfortunately, dry surface and subsoil moisture conditions prevail (see june 26, 2012, drought monitor. Abstract stress caused by early weed competition is known to delay the rate of maize development which may result in a decrease in kernel number 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.