Microspore embryogenesis and production of haploid and doubled haploid plants in carrot (Daucus carota L.)

文献类型： 外文期刊

第一作者： Li, Jin-Rong

作者： Li, Jin-Rong;Zhuang, Fei-Yun;Ou, Cheng-Gang;Hu, Hong;Zhao, Zhi-Wei;Mao, Ji-Hua

作者机构：

关键词： Microspore culture;Haploid;Doubled haploid;Cytology;Genotype;Cold and heat pretreatment;Carrot;Daucus carota L.

期刊名称：PLANT CELL TISSUE AND ORGAN CULTURE （ 影响因子：2.711； 五年影响因子：2.73 ）

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收录情况： SCI

摘要： Protocols were developed for the generation of haploid and doubled haploid plants from isolated microspores of carrot (Daucus carota L.). Forty-seven carrot accessions, including six inbred lines, 11 cultivars, 20 F(1)s, two BC(1)F(1)s, four F(2)s, one F-3, and three F(4)s, were screened to evaluate the genotype influence on isolated microspore embryogenesis over 4 years. Twenty-eight accessions responded by producing embryos and/or calli. A cytological analysis showed that two modes of carrot microspore embryogenesis exist: an indirect route via calli (C mode), and a direct route via embryos (E mode). Eleven accessions were in the C mode, and 17 were in both modes. The highest production rates were in 10Y25 (a European Nantes cultivar) with 27 calli and 307 embryos, and 100Q6 (a semi-Nantes F-1 hybrid) with 176 calli and 114 embryos. The time period to produce embryos or calli differed significantly between 2 and 6 months. Cold and heat pretreatment generally had a negative impact on the induction of microspore embryogenesis, but a short pretreatment showed a positive influence on some accessions. Twenty-eight lines regenerated plants from the primary individual embryos or calli of three accessions were established to analyze the ploidy level. The percentage of spontaneous diploidization showed very wide differences among the accessions and lines. Differences in leaf color intensity, leaf size, and leaf dissection were found among haploid, doubled haploid, and triploid plants.

分类号： Q942

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