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. 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 by measuring the length of the pre-selected outer side silk of the husk from the primary ear of five. 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.
For genetic coefficients of variation were observed in anthesis-silking interval, followed by grain yields, leaf chlorophyll rates, kernel row numbers, and ear heights the total number of pcr-amplified products was 84 bands, all of which were. 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 hy. 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. Stress, anthesis—silk interval and corn yield potential abstract (v10) to tasseling and silking (vt and r1) as of july 1st, theusda reportsthat 16 percent of iowa’s corn was silking that's nearly 2 weeks ahead of normal unfortunately, dry surface and.
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 appears to be a general response by the plant to a reduction in photosynthate formed during this growth stage. Minimum anthesis-silking interval (25) was observed for hp1100-24, and hp1100-14, while maximum anthesis-silking interval (60) was observed for hp1097-5 lsd for comparison among the means was 164 ( table 2 . Meta-analyses of qtl for grain yield and anthesis silking interval in 18 maize populations evaluated under water-stressed and well-watered environments. Anthesis is the period during which a flower is fully open and functional it may also refer to the onset of that period the onset of anthesis is spectacular in some species in banksia species, for example, anthesis involves the extension of the style far beyond the upper perianth parts anthesis of flowers is sequential within an inflorescence, so when the style and perianth are different.
A garment of this cloth a gown of such material worn distinctively by a king's or queen's counsel at the english bar silks, the blouse and peaked cap, considered together, worn by a jockey or sulky driver in a race informal a parachute, especially one opened aloft. Explain thesis statement: how anthesis silking interval is abbreviated or is used as part of acronym or abbreviation definition interval in breeding for drought tolerance in tropical maize. 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. 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. The positions of the 68 mqtl for grain yield and anthesis silking interval markers with known physical positions that were closest to the two flanking snps found in this study were chosen to define the interval.
Stability in the genotypic expression of anthesis-silking interval, grain yield, plant height, root lodging and plant stand across the test locations. Define anthesis anthesis synonyms, anthesis pronunciation, anthesis translation, english dictionary definition of anthesis n pl an he es the period during which a flower is fully open and functional n the time when a flower becomes sexually functional n, pl -ses. And female (silking) floral maturity, referred to as the anthesis–silking interval (asi) many studies have shown that maize yield also is a function of crop growth rate around flowering. Two consensus quantitative trait loci clusters controlling anthesis–silking interval, ear setting and grain yield might be related with drought tolerance in maize. By 2% and anthesis-silking interval by 36% and less than 6% reduction in average days to anthesis, plant height, ear height, plant aspect and ear aspect [14.
Preferred name: anthesis silking interval synonyms: asi antskit flwslkinter definitions: a difference of the average number of days between the maize tassel flowering and the first visible silk (stigma) on the maize ear. The interval between anthesis and silking was estimated by counting the difference in number of days required for 50% of the plants within each plot to present pollen shed and 90% of the plants to have visible silks. 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 100. 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.
Anthesis-silking interval of 30 days was recorded for the hybrids p1x x p5, p3 x p5 and p5 x p12 whereas p1 x p3 (05) had the lowest value of anthesis-silking interval (table 1) hybrids with the longer anthesis-silking interval are undesirable for grain yield. The anthesis to silking interval (asi) is highly correlated to grain yields under drought stress as shown by experiments conducted at cimmyt, mexico anthesis to silking interval usefulness in developing drought tolerant maize jected to anova using genstat-5 computer program anthesis to silking interval usefulness in developing drought.
During maize (zea mays l) growth and change of anthesis-silking interval (asi) is one of the most serious consequences to realize the genetic basis of asi, a recombinant inbred line (ril) population consisting of 239 rils, derived from the cross between mo17 and huangzao4, was used to identify the. Anthesis-silking interval as a measure of nicking (synchronization) of pollen shed with silking the authors also observed that anthesis-silking interval is a trait used mostly in screening genotypes for tolerance to stresses consequently, anthesis-silking interval has been reported to be a valuable diagnostic trait for. 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 f.