Anthesis silking interval maize

anthesis silking interval maize 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.

Genetic study of some maize (zea mays l) genotypes in humid tropic of ethiopia were obtained from all traits except anthesis-silking interval depicting the traits respond positively due to selection estimates maize was introduced to ethiopia by the portuguese in the 16 th or 17th century [2] since its introduction, it has gained. Rain yields of modern commercial maize hybrids greatly exceed those of their predecessors (duvick, 2005 per-plant anthesis–silking interval maize morphophysiological responses to intense crowding and low nitrogen availability: an analysis and review. Results to elucidate the genetic control of drought in maize, we evaluated approximately 5000 inbred lines from 30 linkage-association joint mapping populations under two contrasting water regimes for seven drought-related traits, including yield and anthesis-silking interval (asi. Bolaños j, edmeades go (1996) the importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize field crops res 48:65–80 crossref google scholar cimmyt-zimbabwe (2000) 2000 research highlights.

Details for: the importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize normal view marc view isbd view the importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize. 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. This caused poor synchrony between silking and tasselling this is because the anthesis-silking interval is a prediction of seed set in many maize varieties when under stress at flowering.

The importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize the importance of the anthesis-silking interval in breeding for drought tolerance in tropical maize bolaños, j edmeades, go 1996-09-01 00:00:00 selection for improved performance under drought based on grain yield alone has often been considered inefficient, but the use of secondary traits. Maize is the important staple food in many part of the world genetic variation in the breeding material and anthesis, anthesis silking interval, chlorophyll content, ear length, number of cobs row-1, fresh ear weight, kernels rows ear-1, kernels row , 100-kernel weight, grain moisture, ear diameter, cob diameter and grain. Summary of the 68 meta qtl (mqtl) for grain yield and anthesis-silking interval detected across 18 maize populations the number of mqtl identified on each chromosome varied from 4 on chromosome 10 to 9 on chromosome 1, with an average of 68 mqtl per chromosome.

The capacity to predict time to silking relative to anthesis in maize (zea mays l) has important implications for breeding and seed production we developed a theoretical quantitative framework for simulating the anthesis to silking interval (asi) based on plant growth and biomass partitioning to the ear. Anthesis silking interval (079) had the highest positive direct effect on yield followed by cob diameter (031), cob length (031) and plant height (004) indicating the effectiveness of direct selection. Anthesis — silk interval: an indicator of stress one of the best indicators of how plants respond to stress during flowering is the anthesis — silk interval, asi this measures the time in days between pollen shed and silk emergence.

Loci underlying drought tolerance in maize yanli lua,b, shihuang zhang c, trushar shahb,1, with anthesis-silking interval (asi), an important trait for trait for drought tolerance in maize is the asynchrony between silk emergence and pollen shedding under water-limited con. 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. 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.

Anthesis silking interval maize

anthesis silking interval maize 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.

Anthesis and silking dynamics of maize under contrasting nitrogen and water levels md samim hossain molla1, 2, sutkhet nakasathien2,, ed sarobol2 and vichan vichukit2 anthesis silking interval (asi) was calculated as the difference between the days to 50% silking and the days to 50% anthesis the silk growth. 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. Heritability and performance of single cross maize hybrids in dilla and abaya areas from -3814% for anthesis-silking interval to 9980% for plant heightthe highest grain yield of 1857 and 1810 (t/ha) were obtained from limu and jabi in that order in contrast, the lowest. 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.

  • Maize (zea mays l) is one of the most important crops in the world although maize is originally adapted to a hot johnson, 1980), and elongation of the anthesis-silking interval (wooley et al, 1962 bassetti and westgate, 1994) to the best of our knowledge, however, there is no report.
  • Maize hybrids under waterlogging stress imposed at two critical stages viz, seedling stage (2-leaf stage) and knee-high anthesis silking interval (asi) was calculated as the difference between numbers of days from 50% anthesis to 50% silking this evaluation was recorded by.
  • Examples include anthesis silking interval (asi), ears per plant, time to anthesis, leaf rolling, pht, and senescence (edmeades et al, 1999 monneveux et al, 2006) more recently, ndvi measured during canopy development stages, as an indicator for early vigor was proposed as a secondary trait to be included in breeding for maize grain yield.

The mapping results for days to anthesis, days to silking, anthesis–silking interval, coefficient of variation (cv) of da and cv of das by the method of joint stepwise regression for both cn-nam and us-nam. Grain yield as a function of mean anthesis-silking interval (asi), ears plant i weight kernel- 1 and kernels ear- 1 for 50 progeny trials (166-250 s 1 or 4 6 - 1 6 0 $2, 3 progenies each across two replicates) from six tropical maize populations under a range of water regimes at tlaltizapfin, m6xico, 1986-1990. 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 . Et al, (1996) demonstrated that the genetic variance of anthesis silking interval (asi) increased as a function of the stress intensity ribaut et al, (1996) found that the broad-sense heritabilities of male flowering, female flowering and anthesis silking interval (asi) in maize were high under stress conditions, being 82% and 78%,.

anthesis silking interval maize 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. anthesis silking interval maize 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. anthesis silking interval maize 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. anthesis silking interval maize 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.
Anthesis silking interval maize
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