【摘 要】
：
Carotenoids are natural pigments which play an important role in human health.To dissect the genetic basis of maize carotenoid biosynthesis and accumulation,a genome-wide association study was perform
【机 构】
：
National Maize Improvement Center of China,China Agricultural University,Beijing 100193,China
论文部分内容阅读
Carotenoids are natural pigments which play an important role in human health.To dissect the genetic basis of maize carotenoid biosynthesis and accumulation,a genome-wide association study was performed using 1.06 million SNPs and seven carotenoid related traits in a maize panel of 508 maize inbred lines.We identified 18loci significantly associated with carotenoid related traits in maize kernels at P ＜1.8E-6,and over half of the detected loci had the evidence support of QTL (11/18)and eQTL (13/18).Among these loci,a chaperone of heat shock protein,ZmTIM15,was significantly associated with the ratio trait in carotenoid biosynthesis pathway with P value of 2.45E-10.The function of ZmTIM15 was further validated by candidate-gene association mapping,linkage and expression analysis.These results provide useful insight into the genetic mechanism of carotenoid biosynthesis in maize kernels and biofortification of maize carotenoid related trait.
其他文献
二斑叶螨(Tetranychus urticae Koch)又名二点叶螨，俗称白蜘蛛，近几年在安徽砀山黄河故道地区砀山酥梨上有不同程度的发生，当地果农喷药防治未能取得理想效果，成为当地梨树虫害防治的难点。对砀山酥梨选用不同防治螨害药剂进行喷布试验分析研究，筛选出低毒高效的防治药剂，可供防控砀山酥梨螨害参考。
小白杏(Prunus armeniaca L.Xiaobaixing)是起源于新疆的著名杏品种之一,早熟且具有良好的外观和内在品质,其自交不亲和性极大地影响了产量和经济价值.目前对杏自交不亲和机理已有一定的认识,但对其相关基因调控的研究较少,RNAi(RNA interference)技术的兴起为调控目的基因表达和功能研究提供了有力工具,从分子水平调控杏自交不亲和性状具有重要意义.本研究通过构建自
葡萄(Vitis vinifera L.)最适生长温度为25～30℃,高温严重影响其生长发育,但有关高温胁迫下葡萄信号转导的研究较少.促分裂原活化蛋白激酶(mitogen-activated protein kinase,MAPK)的级联系统被认为是植物细胞将胞外刺激信号转换成胞内反应的主要途径之一.本研究旨在克隆葡萄应答高温胁迫的MAPK基因,分析其在不同条件下的表达特性,观察该基因编码蛋白在细
中国樱桃(Prunus pseudocerasus Lindl.)、欧洲甜樱桃(P.avium Linn.)和毛樱桃(P.tomentosa Thunb.)是重要的樱桃栽培种，在长期的驯化过程中形成许多地方种质和栽培品种.然而对于樱桃主要栽培种内的遗传多样性及种间遗传关系仍缺乏研究.从DNA序列变异角度深入分析其遗传多样性及种间遗传关系，对于正确保护和开发利用优异樱桃资源具有重要意义.
辣椒有较强的抗旱能力，耐水涝能力较差。水涝胁迫会限制辣椒的正常生长，制约辣椒的生产。筛选抗水涝能力较强的种质是提高辣椒产量和质量，促进辣椒开发与利用的重要基础。
重点探讨了不同结实能力观赏海棠花粉的授粉特性，研究其生活力、杂交亲和力及结实率，为今后研究新品种观赏海棠育种提供依据.以6种不同结实能力的观赏海棠：高结实能力品种高原红(MalusPrairifire)、珠穆朗玛(M.Everest)、多花海棠(M.floribunda)，中结实能力品种魔术(M. Indian Magic)，以及低结实能力品种唐纳德·怀曼(M. Donald Wyman)、红玉(
S type cytoplasmic male sterile (CMS-S) is the largest type of CMS in maize.Limited understanding of the genetic architecture of fertility restoration to CMS-S affects its utility in hybrid breeding.I
Known as vitamin E,tocopherols play an important role both in protecting the photosynthetic system in plants and as an antioxidant in human body.In maize kemel,tocopherols mainly exist as γ-tocopherol
Waxy maize (Zea mays L.var.certaina Kulesh),with many excellent characters in terms of starch composition and economic value,has grown in China for a long history and its production has increased dram
Waxy maize (Zea mays L.var.certaina Kulesh),with many excellent characters in terms of starch composition and economic value,has grown in China for a long history and its production has increased dram