Effective silique number per plant(ESN), seeds per silique(SS), thousand seeds weight(TSW), silique length(SL) and silique density(SD) are important seed yield potential determinant traits in rapeseed(Brassica napus L...Effective silique number per plant(ESN), seeds per silique(SS), thousand seeds weight(TSW), silique length(SL) and silique density(SD) are important seed yield potential determinant traits in rapeseed(Brassica napus L.), which are controlled by quantitative trait loci(QTL). Mapping QTL to delimited chromosomal region offers an effective method for genetic dissection of these traits. A set of 96 double haploid(DH) lines were developed by crossing 2 Brassica napus lines R1 and R2, and an immortalized F_2(IF_2) population containing 124 combinations was developed by crossing those DH lines. DH populations were planted at 2 locations for 2 years and IF_2 populations were planted in 2 locations for 1 year. Based on the established 2,217.2 cM length high density genetic map, 42 QTLs were identified, with 26 QTLs detected repeatedly in different environments or populations, including 8 for SL, 7 for TSW, 4 for ESN, 4 for SS and 3 for SD. Among these identified QTLs, 3, 4, 1, 1 and 3 QTLs were considered as major QTLs for SL, TSW, ESN, SS and SD, respectively. In addition, 2 QTLs on A9 chromosome which control multiple traits were identified. These results warrant further study of fine mapping for yield and yield components.展开更多
目的研发东亚人群中具有较高个体识别率及族源分析能力的SNP Panal。方法以耶鲁大学KIDD教授建立的55个SNP Panel和加利福尼亚大学戴维斯分校SELDIN教授建立的128个SNP Panel,共计170个SNP Panel(简称170 SNP Panel)为基础,收集其在东...目的研发东亚人群中具有较高个体识别率及族源分析能力的SNP Panal。方法以耶鲁大学KIDD教授建立的55个SNP Panel和加利福尼亚大学戴维斯分校SELDIN教授建立的128个SNP Panel,共计170个SNP Panel(简称170 SNP Panel)为基础,收集其在东亚人群中的检测数据,计算SNP位点的遗传学参数,结合热图分析结果筛选出适合东亚人群的SNP位点,并检测部分藏族及汉族人群样本,运用STRUCTURE软件、主成分分析、热图分析等方法分析其用于族源推断的可能性。结果筛选出45个SNP组成的Panel(简称45 SNP Panel),其中SNP位点的遗传学参数平均值优于170 SNP Panel,与170 SNP Panel具有相同的族源分析及推断能力。结论在族源推断信息上,45 SNP Panel完全可以替代170 SNP Panel,达到相同的族源分析及推断能力。而在遗传学参数上,在东亚人群中45 SNP Panel优于170 SNP Panel,体现了其潜在的重要法医学应用价值。展开更多
基金supported by the National Key Research and Development Program of China(No.2016YFD0101300)the Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences(Group No.118)+1 种基金the Earmarked Fund for China Agriculture Research System(CARS-12)Hubei Agricultural Science and Technology Innovation Center(201620000001048)
文摘Effective silique number per plant(ESN), seeds per silique(SS), thousand seeds weight(TSW), silique length(SL) and silique density(SD) are important seed yield potential determinant traits in rapeseed(Brassica napus L.), which are controlled by quantitative trait loci(QTL). Mapping QTL to delimited chromosomal region offers an effective method for genetic dissection of these traits. A set of 96 double haploid(DH) lines were developed by crossing 2 Brassica napus lines R1 and R2, and an immortalized F_2(IF_2) population containing 124 combinations was developed by crossing those DH lines. DH populations were planted at 2 locations for 2 years and IF_2 populations were planted in 2 locations for 1 year. Based on the established 2,217.2 cM length high density genetic map, 42 QTLs were identified, with 26 QTLs detected repeatedly in different environments or populations, including 8 for SL, 7 for TSW, 4 for ESN, 4 for SS and 3 for SD. Among these identified QTLs, 3, 4, 1, 1 and 3 QTLs were considered as major QTLs for SL, TSW, ESN, SS and SD, respectively. In addition, 2 QTLs on A9 chromosome which control multiple traits were identified. These results warrant further study of fine mapping for yield and yield components.
文摘目的研发东亚人群中具有较高个体识别率及族源分析能力的SNP Panal。方法以耶鲁大学KIDD教授建立的55个SNP Panel和加利福尼亚大学戴维斯分校SELDIN教授建立的128个SNP Panel,共计170个SNP Panel(简称170 SNP Panel)为基础,收集其在东亚人群中的检测数据,计算SNP位点的遗传学参数,结合热图分析结果筛选出适合东亚人群的SNP位点,并检测部分藏族及汉族人群样本,运用STRUCTURE软件、主成分分析、热图分析等方法分析其用于族源推断的可能性。结果筛选出45个SNP组成的Panel(简称45 SNP Panel),其中SNP位点的遗传学参数平均值优于170 SNP Panel,与170 SNP Panel具有相同的族源分析及推断能力。结论在族源推断信息上,45 SNP Panel完全可以替代170 SNP Panel,达到相同的族源分析及推断能力。而在遗传学参数上,在东亚人群中45 SNP Panel优于170 SNP Panel,体现了其潜在的重要法医学应用价值。