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Obtaining citrus hybrids by in vitro culture of embryos from mature seeds and early identification of hybrid seedlings by allele-specific PCR

文献类型： 外文期刊

作者： Zhu, Shiping 1 ; Wu, Bo 2 ; Ma, Yanyan 2 ; Chen, Jiao 2 ; Zhong, Guangyan 1 ;

作者机构： 1.Chinese Acad Agr Sci, Citrus Res Inst, Natl Engn Res Ctr Citrus, Chongqing 400712, Peoples R China

2.Southwest Univ, Coll Hort & Landscape Architecture, Chongqing 400715, Peoples R China

3.Guangdong Acad Agr Sci, Inst Fruit Tree Res, Guangzhou 510640, Guangdong, Peoples R China

关键词： Citrus;Rootstock breeding;Embryo culture;SNP;Allele specific PCR

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2013 年 161 卷

页码：

收录情况： SCI

摘要： Two trifoliate oranges (Poncirus trifoliata var. monstrosa and P. trifoliata cv 'Xiaoganzhi') were used separately as pollinators to cross with Shantou-Suanju (Citrus sunki Hort. ex. Tan.) for breeding new citrus rootstocks. Embryos from the seeds of mature fruits were rescued and individually cultured in vitro. On average, 9.0-10.0 embryos per seed were harvested from the two crosses. The zygotic seedlings were only derived from large- to medium-sized embryos. The small embryos were not able to germinate or develop into seedlings. The numbers of seedlings per seed produced from the two crosses were similar, ranging from 1 to 11 and 1 to 14, at average of 4.17 and 4.90, respectively, with in vitro culture in this study. A dominant trifoliate leaf trait from P. trifoliata was used as a morphological marker to discriminate hybrid from nucellar seedlings. Of 43 and 14 zygotic seedlings were obtained from 98 and 65 seeds of the two crosses, respectively. In addition to the use of morphological marker, single nucleotide polymorphism based allele specific PCR (AS-PCR) was also successfully employed as a handy tool to confirm and identify zygotic seedlings. Published by Elsevier B.V.

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