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. 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. Selection of corn cultivars for drought tolerance was evaluated by bolaños 112 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. Anthesis-silking interval is a good indicator finally determine harvest index the growth and of movement of newly produced assimilated to the ear, emergence of silks is delayed when water stress occurs cob growth, number of grains and also the water potential before flowering [7, 8] when maize seedlings adjust to. 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 importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize j bolafios , go edmeades maize physiologists, cimmy~, apdo 6-641, 06600, mdxico df, mexico received 7 december 1995 accepted 11 march 1996 abstract selection for improved performance under drought based. 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. Their existence is determined at different stages of the crop's life cycle (banziger et al, 1999) anthesis-silking interval if drought occurs during the reproductive stages of maize silking is considerably delayed, while anthesis is delayed to a lesser extent thus, the anthesis-silking interval (days from anthesis to 15. Silk emergence • each silk that emerges from an ear shoot connects to a single ovule, or potential kernel • a silk must be pollinated for the ovule to develop into a kernel pollination once pollen grains have matured inside corn anthers, these anthers anthesis-silking interval (asi)― the time between the start of pollen.
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,. Obvious traits observed in maize is delay in silk emergence (silking) with respect to pollen shed (anthesis), as a result of stress this phenomenon, termed the anthesis silking interval (asi), has been studied extensively (bolaños and edmeades, 1996 westgate, 1997) anthesis silking interval increased asi has been. 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.
Identiﬁcation of quantitative trait loci for anthesis-silking interval and yield components under drought stress in maize l1 xin-hai, llu xian-de, l1 ming- shun, zhang shi-huang (key laboratory of crop genetics and breeding, ministry ongrieulture, institute ofcrop breeding and cultivation chinese academy. 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 of delay.
Full-text (pdf) | 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 to grain yields under drought stress as shown by experiments conducted at cimmyt, m. Days to mid anthesis anova analysis of variance asi anthesis silking interval art agricultural research trust cimmyt international maize and wheat improvement center cl cimmyt lines cml cimmyt maize line czh cimmyt zimbabwe hybrid eh ear height epp ears per plant epo ear position et. 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) × sd35 ( intolerant) were evaluated for these traits in a two replicated experiment rflp analysis of. Meta-analyses of qtl for grain yield and anthesis silking interval in 18 maize populations evaluated under water-stressed and well-watered environments ( pmid:23663209) pmid:23663209 abstract this article is available in europe pmc citations list of citations in europe pmc which this record is cited by and br/.
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. 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.