【摘 要】
：
Grain size is one of the most important agronomic traits controlling grain yield. Development of novel germplasm with large grains would be beneficial for crop improvement. We report the genetic identifi-cation and functional analysis of the LONG GRAIN 6
【机 构】
：
State Key Laboratory of Plant Physiology and Biochemistry,China Agricultural University,Beijing 1001
论文部分内容阅读
Grain size is one of the most important agronomic traits controlling grain yield. Development of novel germplasm with large grains would be beneficial for crop improvement. We report the genetic identifi-cation and functional analysis of the LONG GRAIN 6 (LOG6) gene, which is identical to MITOGEN-ACTIVATED PROTEIN KINASE 6 (OsMAPK6), affecting grain length of rice. Map-based cloning revealed that the long-grain phenotype of log6-D results from a glutamine (E) to lysine (K) mutation in the conserved TEY motif of OsMAPK6. In near-isogenic lines (NILs), the log6-D allele increased grain length and grain yield of Guichao 2 (GC2), Teqing (TQ), and 93-11. Sequence analysis revealed 10 OsMAPK6 haplotypes, with xian (indica) and geng (japonica) harboring different haplotypes. Our findings shed light on the func-tion of MAPKs and offer a novel dominant allele for improving the grain yield of rice.
其他文献
Simple sequence repeat (SSR) markers have been proved to be a very powerful tool for quantitative trait locus (QTL) mapping, marker-assisted selection and comparative genomics research in many crop spe-cies. However, a high-density SSR genetic linkage map
Poor filling and low weight of inferior kernels limit the further improvement of wheat yield. Two culti-vars, Shuangda 1 and Xinong 538, with different grain weights, were selected to investigate the physio-logical changes of inferior kernels by removal o
Deep placement of nitrogen fertilizer is a key strategy for improving nitrogen use efficiency. A two-year field experiment was conducted during the early rice growing seasons (March-July) of 2016 and 2017. The experimental treatments comprised two rice cu
Common wheat (Triticum aestivum) is a hexaploid plant (AABBDD) derived from genetically related tetra-ploid wheat T. turgidum (AABB) and a diploid goatgrass Aegilops tauschii (DD). Recent advances in sequencing technology and genome assembly strategies al
Bulked-segregant analysis is a time-and cost-saving strategy for identifying major quantitative trait loci (QTL) in a mapping population. Bulked-segregant analysis combined with whole-genome sequencing (BSA-seq) was performed to rapidly identify QTL for h
Zhongshuang 11 (ZS11) is an elite inbred rapeseed (Brassica napus L.) cultivar widely planted in the Yangtze River basin for its favorable characteristics including high seed oil content (SOC), low seed glu-cosinolate content (SGC), long siliques, and sta
Erratic rainfall often results in intermittent drought and/or waterlogging and limits maize (Zea mays L.) productivity in many parts of the Asian tropics. Developing climate-resilient maize germplasm possess-ing tolerance to these key abiotic stresses wit
Lodging is a major problem limiting maize yield worldwide. However, the mechanisms of lodging resis-tance remain incompletely understood for maize. Here, we evaluated 443 maize accessions for lodging resistance in the field. Five lodging-resistant accessi
研究A、B、C3个配方的大蒜素长效驱避剂的缓释性能及其与普通大蒜素水乳液的差异.建立羊毛中大蒜素的气相色谱检测方法,对影响羊毛中大蒜素检出的萃取时间、萃取液体积、萃取温度及羊毛浸泡时间进行单因素试验条件优化与筛选,采用所建立方法对浸泡过相应驱蜱剂的羊毛分别于0d、1d、2d、3d、5d、8d、12 d、18 d检测其大蒜素含量,并以第0天羊毛中所测得的大蒜素含量为初始值,其他各时间点为余留值,得到不同配方的大蒜素的相对释放率,绘制时间/相对释放率曲线,结合不同处理组同一时间点的大蒜素含量进行差异性分析,对
在甘肃不同生态区域收集宽叶羌活种苗,制定宽叶羌活种苗质量分级标准,为宽叶羌活规范化种植提供理论依据.以宽叶羌活单根鲜重、根粗、根长为评价指标,将收集到的33份宽叶羌活种苗采用K均值聚类法分为3类,根据聚类分析结果和生产实际制定宽叶羌活种苗质量分级标准.结果 显示,甘肃省宽叶羌活种苗划分成3个等级:一级种苗单根鲜质量2.1g≤W＜3.0 g,根长19.0 cm≤L＜26.0 cm;二级种苗单根鲜质量W≥3.0 g,根长L≥26.0 cm;三级种苗单根鲜质量1.2 g≤W＜2.1 g,根长12.0 cm≤L＜