Anthesis-silking interval asi

anthesis-silking interval asi Pollen-shedding(dtp), silking(dts) and anthesis-silking interval(asi) were analyzed with the inclusive composite interval mapping method(icim) the analysis showed that, a total.

Other drought tolerance-related selection criteria: anthesis-silking interval (asi) leaf senescence chlorophyll content (cc) root capacitance final grain yield 250 205 lines. 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 raised that they may have a partly. This paper reviewed the effect of drought on the development of reproductive organs and the anthesis-silking interval drought occurred before anthesis may delay the.

Grain yield (gy) and anthesis-silking interval (asi), and 2) assess the performance of testcrosses in stress and nonstress environments the testcrosses were evaluated in intermediate drought stress, low nitrogen (n) stress, and nonstress (normal) environments in 2007 mean grain yield. 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. Time to 50% anthesis (tt a) and silking (tt s), the anthesis-silking interval in days (asi d) and in tt (asi tt), plant height (ph), prolificacy (pr), gy, kernel numbers (kn), and kernel weight (kw) data were normalized respect to the median value of each genotype group and pp computed. Abstract a field experiment was conducted on maize hybrids (bio-9681 and pro-311) to illustrate the effect of phosphorus (p) on physiological growth analysis traits, anthesis-to-silking interval (asi) and its correlation with yield.

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. The objectives of this study were to identify meta-qtl (mqtl) for grain yield (gy) and anthesis silking interval (asi) across 18 bi-parental maize populations evaluated in the same conditions across 2-4 managed water stressed and 3-4 well watered environments results. Abstract 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) increasesthis appears to be a general response by the plant to a reduction in photosynthate formed during this growth stage. 丝间隔期(anthesis-silking interval, asi), 即玉米雄穗 散粉和雌穗吐丝之间的时间间隔, 也有学者把这种 现象称之为“吐丝延迟”、“同步性丧失”、“雄穗先熟” 等[25. 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 [10] are a change in color from green to greengray, and rolling of the lower leaves followed .

Under drought stress, a delay in silk emergence resulted in a long anthesis silking interval (asi), low ear setting percentage, and yield heavy losses 在干旱胁迫下,果穗. 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. The objectives of the study were to i&ntify genetic segments responsible for the e»qxession of anthesis- silking interval (asi), ear setting and grain yield, and to examine if the quantitative trait loci (qtls)for asi or yield components can be used in marker-assisted selection (mas) to improve grain yield under drought. The anthesis-silking interval (asi) was determined as the days from silking to anthesis in the field of kaes, the plants were sown on 16 may in 2001, and 22 may in 2002 and 2003 with a 4-row plot (rows 4 m long spaced 072m apart, hill distance 018 m) with 4 replications.

The narrow asi is (anthesis-silking interval) very useful trait to increase kernel numbers in maize genotype(s) (bolanos and edmeades, 1996 ribaut et al, 1996) in addition to other morpho-physiological traits so, asi of each hybrid must be examined minutely grain yield is positively and strongly correlated to kernel. The most widely observed effect is the temporal separation of male (anthesis) and female (silking) floral maturity, referred to as the anthesis-silking interval (asi. 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.

  • Frequencies of f2 genotypes from kvd2 x cml442 population flowering at 49-57 days in the f2 population of kdv2 x cml442, the frequency of early maturing genotypes was 74% with asi ranging from 88 kahiu ngugi et al: anthesis to silking interval usefulness in developing drought tolerant maize -2 to 10 days (fig 1.
  • 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.
  • The objectives of the study were to identify genetic segments responsible for the expression of anthesis-silking interval (asi), ear setting and grain yield, and to examine if the quantitative trait loci (qtls) for asi or yield components can be used in marker-assisted selection (mas) to improve grain yield under drought.

水、旱稻dh和ril群体抗旱性状相关分析及其qtl表达规律比较 基于多重相关ril群体的玉米株高和穗位高qtl定位 利用ril群体对水稻再生力及相关农艺性状的qtl. Flowering parameters and the anthesissilking interval received: 2 august 1995 / accepted: 19 january 1996 abstract drought is an important climatic phenomenon which, after soil infertility, ranks as the second most se- in an increase in the length of the anthesis-silking interval (asi) and in a decrease in grain yield selection for re. Maize trait maize trait anthesis silking interval anthesis silking interval anthesis silking interval asi chlorophyll content chlorophyll content chl leaf chlorophyll content gr. Reductions in asi were associated with a decline in spikelets ear-1, increases in rates of ear, spikelet and silk growth, spikelet size at anthesis and harvest index, and an increased tolerance to low fertility and shade broad-sense heritability of asi is typically 05 to 07, and several quantitative trait loci for the trait have been identified.

anthesis-silking interval asi Pollen-shedding(dtp), silking(dts) and anthesis-silking interval(asi) were analyzed with the inclusive composite interval mapping method(icim) the analysis showed that, a total. anthesis-silking interval asi Pollen-shedding(dtp), silking(dts) and anthesis-silking interval(asi) were analyzed with the inclusive composite interval mapping method(icim) the analysis showed that, a total.
Anthesis-silking interval asi
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