It is now widely used in the poultry farms, fisheries and animal feeding, as well as the people consume roasted and fried maize in Bangladesh.
Crop Science 39Differences in weight were attributed to changes in soil water content, after correction for the increase in mean plant biomass as a function of phenological stage. Fertilizers were applied at the rate of55,40, 5 and 1.
Keeping in mind the experiment was conducted with following objectives i tosubmit correlative relationship between grain yield and other morphological traits and; ii also founding direct and indirect effects of those traits on yield. Agronomy Journal, 51, Built-in shade avoidance is the issue, as the coleoptile emerges into daylight.
Physiological mecha- not be genetically linked to each other, it is possible to com- nisms contributing to the increased N stress tolerance of tropical maize selected for drought tolerance. The ASI for older hybrids in good condition might have been 2 to 3 days with a range up to a week or more.
The idealized fertilizer N balance calculation likely underestimated actual N depletion; the extent to which soil N was depleted was dependent on soil texture and pH. Responses in reproductive grain yield had a low heritability but was positively correlated Anthesis-silking interval asi.
Results and Discussion Mean sum of squares from pooled analysis revealed significant effects for yield. In terms of production, India, with 9. Gains in biomass, grain yield and harvest index.
Hybrids in both Embu and Kiboko, however, differed in their stover nutrient accumulation. Experiments 1—3 and 5—7 aimed at establishing the responses of leaf elongation rate to meristem temperature and to evaporative demand.
This is in part because silks have the highest water content among all parts of the corn plant. He can be reached at or e-mail relmore iastate. The other was a near-isoline, without the drought-tolerant genetics.
Anthesis silking interval 0. John Willey and Sons Inc. How It Works Professor Clarence Swanton published the groundbreaking study in in a peer-reviewed scientific journal and followed up in with further discovery. Genotypic upper diagonal and phenotypic lower diagonal correlation with yield.
The impact of stress on corn depends on the timing of two critical events: The experiment was laid out in Randomized Complete Block Design with 3 replications. Genotypic and Phenotypic Correlation Coefficients with Yield The genotypic upper diagonal and phenotypic lower diagonal correlation coefficients for all nine traits were presented Table 3.
Subsequent water was withdrawn. JRA1 5: Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Integrated Crop Management News, and Iowa State University Extension and Outreach.
Post-harvest of the final season, soil was sampled to a depth of 90 cm in each plot at 5 depth increments, cm and analyzed for general soil characteristics pH, bulk density, OM, etc.
By contrast, other regions influencing ASI had no influence on leaf growth. In a companion experiment, predawn leaf water potential was measured in leaves 4—7 at contrasting water contents on parental lines and on the reference hybrid Dea. Drought stress was imposed by irrigating at lower grain yields.
Indeed even after eight cycles of recurrent an interval of 4 days for three hours, right from germination selection, grain yield under severe drought stress levels was stage up to 14 days before anthesis male flowering when highly positively correlated with a short ASI.
All the traits showed high heritability indicating lower influence of environment which also observed in the study of . This period corresponds to a plateau during which leaf elongation rate is stable Sadok et al.
Increasing stress by delaying weed control affected both hybrids. Maximum leaf elongation rate per unit thermal time parameter a and the slopes of its responses to evaporative demand and soil water status parameters b and c were measured in greenhouse and growth chamber experiments, in two series of recombinant inbred lines RILs studied in and with 33 RILs in common both years.
Genotypic and phenotypic variance, heritability and genetic advance were measured according to the formula proposed by   and . This was done Eleven genotypes which included four CIMMYT inbred lines through visual estimation of the whole plot and the proportion and KARI composites and synthetics were evaluated under of green leaves versus senescent dried leaves was scored on a drought stress environment.
The path analysis provides the effective measures of direct and indirect causes of association and depicts the relative importance of each factor involved in contributing to the final product .
Secondary traits exhibiting high heritability for drought tolerance such as grain yield, anthesis-silking interval (ASI), tassel size, ears per plant and leaf rolling were evaluated. In season I, the 25 genotypes were grown under optimal conditions (under.
Web of Science This content is provided by Web of Science Core Collection, as a free preview. To access all the content and features, you need a Web of Science Core Collection subscription. Table S2 Anthesis-silking interval (ASI) under low N in ACS6 RNAi transgenic events and wild type.
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ditions, this asynchrony, termed the anthesis-silking interval (ASI), is highly correlated with grain yield (19), which has been extensively studied through linkage analysis (20). A short mean ASI (anthesis -silking interval) was scored ( days), which ranged from to in BEC and BML, respectively (Table 1), and negative values were detected for seven landraces (DHT, BEC, KTA, DDL, ONA, TIF and AGU).
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.Anthesis-silking interval asi