Identification of new S-RNase alleles and S-genotype in two pear species (Pyrus pyrifolia and P-bretschneideri) grown in China by genomic PCR and pollination tests
文献类型: 外文期刊
第一作者: Zhang, Lin
作者: Zhang, Lin;Tan, Xiao-Feng;Wuyun, Ta-Na;Qiu, Jian;Yuan, De-Yi;Wang, Qi-Rui;Zhang, Dang-Quan;Wang, Qi-Rui;Cao, Yu-Fen
作者机构:
关键词: Chinese pears;self-incompatibility;S-genotype;S-RNases;PCR;3' RACE;pollination tests
期刊名称:NEW ZEALAND JOURNAL OF CROP AND HORTICULTURAL SCIENCE ( 影响因子:1.154; 五年影响因子:1.424 )
ISSN: 0114-0671
年卷期: 2007 年 35 卷 4 期
页码:
收录情况: SCI
摘要: Most of the economically important Chinese pears display S-RNase-based gametophytic self-incompatibility (GSI). By genomic PCR and sequence analysis, five new S-RNase alleles (S-5a and S-11 to S-14) in three Chinese sand pear (Pyrus pyrifolia) cultivars and six (S-a to S-f) in five Chinese white pear (P bretschneideri) cultivars were identified. Comparison of nucleotide sequences of S-RNase alleles from the two different Chinese pear species revealed that S-a, S-b, and S-d of P. bretschneideri was identical to S-8, S-14, and S-12 of P. pyrifolia, respectively. We obtained the full-length cDNA sequence of S-12 and determined S-12 was expressed only in the style of pear. The functions of the new S-RNase alleles were confirmed by the controlled pollination tests. As the results, the eight cultivars of the two Chinese pear species were genotyped as: 'Maogong' (S11S12), 'Cangxixueli' (S5aS13), 'Guiguan' (S2S14), 'Jinfeng' ((SSb)-S-a), 'Matihuang' ((SSc)-S-b), 'Jinhuasihao' ((SSe)-S-d), 'Youli' ((SSc)-S-b), and 'Jitui' ((SSf)-S-c). Elucidation of S-genotype would contribute to higher and stable yields in the orchards and a more efficient breeding programme of pears.
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