Production of aneuhaploid and euhaploid sporocytes by meiotic restitution in fertile hybrids between

来源 :遗传学报 | 被引量 : 0次 | 上传用户:liyuanboliwenya2009
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Fertile F1 hybrids were obtained between durum wheat (Triticum durum Desf.) Langdon (LDN) and its 10 disomic substitution (LDN DS) lines with Aegilops tauschii accession AS60 without embryo rescue. Selfed seedset rates for hybrids of LDN with AS60 were 36.87% and 49.45% in 2005 and 2006, respectively. Similar or higher selfed seedset rates were observed in the hybrids of 1D (1A), 1D (1B), 3D (3A), 4D (4B), 7D (7A), and 2D (2B) with AS60, while lower in hybrids of 3D (3B) + 3BL, 5D (5A) + 5AL, 5D (5B) + 5B and 6D (6B) + 6BS with AS60 compared with the hybrids of LDN with AS60. Observation of male gametogenesis showed that meiotic restitution, both first-division restitution (FDR) and single-division meiosis (SDM) resulted in the formation of functional unreduced gametes, which in turn produced seeds. Both euhaploid and aneuhaploid gametes were produced in F1 hybrids. This suggested a strategy to simultane-ously transfer and locate major genes from the ancestral species T. turgidum or Ae. tauschii. Moreover, there was no significant difference in the aneuhaploid rates between the F1 hybrids of LDN and LDN DS lines with AS60, suggesting that meiotic pairing between the two D chromosomes in the hybrids of LDN DS lines with AS60 did not promote the formation of aneuhaploid gametes. Fertile F1 hybrids were obtained between durum wheat (Triticum durum Desf.) Langdon (LDN) and its 10 disomic substitution (LDN DS) lines with Aegilops tauschii accession AS60 without embryo rescue. Selfed seedset rates for hybrids of LDN with AS60 were 36.87% and 49.45% in 2005 and 2006, respectively. Similar or higher selfed seedset rates were observed in the hybrids of 1D (1A), 1D (1B), 3D (3A), 4D (4B), 7D (7A), and 2D ) with AS60 while lower in hybrids of 3D (3B) + 3BL, 5D (5A) + 5AL, 5D (5B) + 5B and 6D (6B) + 6BS with AS60 compared with the hybrids of LDN with AS60. Observation of male gametogenesis showed that meiotic restitution, both both first-division restitution (FDR) and single-division meiosis (SDM) resulted in the formation of functional unreduced gametes, which in turn produced seeds. Both euhaploid and aneuhaploid gametes were produced in F1 hybrids. This suggested a strategy to simultane-ously transfer and locate major genes from the ancestral species T. turgidum or Ae ., there was no significant difference in the aneuhaploid rates between the F1 hybrids of LDN and LDN DS lines with AS60, suggesting that meiotic pairing between the two D chromosomes in the hybrids of LDN DS lines with AS60 did not promote the formation of aneuhaploid gametes.
其他文献
在经济发展初期,由于人们初始的无知,盲目为建设经济加快发展,从而对大自然疯狂肆虐,严重破坏了自然环境,使得全球气候逐渐变暖,产生温室效应.从而人居环境也受到了巨大的挑
最近一段时期,全国大部分地区特别是一些大中城市猪肉价格上涨较快、涨幅较大。受全国市场影响,我区猪肉价格也大幅度上涨。以我区生猪主产区通辽市、赤峰市和主要消费城市呼和浩特市为例,7月份猪肉价格最高,分别为26元/公斤、24元,公斤和25元/公斤,与去年同期相比,猪肉价格上涨幅度分别达到160%、140%和127%。进入8月份以后,价格虽小幅回落,每公斤价格回落2~4元,但仍维持高位运行。  据200
在投资日趋理智的今天,虽然每个人依旧怀揣着“一夜暴富”的梦想,但面临着。高收益”后面隐藏的“高风险”,人们不得不掂量如何”理智开发”握在手里的“真金白银”。萎靡不振的
对石墨涂样检测Cs2BO2+离子条件下甘露醇对硼同位素测定的影响进行了研究,结果 表明在甘露醇存在下11B/10B比值明显高于只有石墨存在时的比值。硼-甘露 醇络合物的形成可能改
随着社会的发展,人口老龄化现象严峻,劳动力失调使得社会压力增大.不论是在城市还是农村,养老观念已经悄然发生改变,养老意识逐渐增强,多种养老方式并存.河北省作为京津冀协
期刊
10多年来,常州产权交易所致力于企业产权交易、技术产权交易和专利交易等十大平台建设,拓展交易领域,创新交易品种和手段,扩大服务范围,不断提升综合服务功能,全力打造促进常
本文研究一类带阻尼项的非线性分数阶微分方程的振动性问题.利用Riemann-Liouville微积分、Riccati变换及不等式的方法,获得带阻尼项的非线性微分方程振动性的充分条件,推广
农村的建设,给许多农民带来了实惠,同时也加重了农村环境的污染,本文用简单的数据介绍了污染的严重性.农村污染,一是对土壤水环境的污染,二是对空气的污染(即恶臭污染).详细
腾格里沙漠面积广阔,区内分布着数十个盐湖,盐湖面积大的为十余平方千米,小的仅 为0.018km2。盐湖卤水主要为湖表卤水,其矿化度较高,大部分盐湖卤水含盐量已达饱和 ,因而进入了自析
经营活动净利润现金部分与经营活动产生的现金流量净额是两个不同的概念,它们的共同点均由经营活动产生。它们的区别在于:经营活动净利润现金部分,是从按权责发生制核算的净