Chloroplast and nuclear genome analysis of the parentage of lemons

被引:50
作者
Gulsen, O [1 ]
Roose, ML [1 ]
机构
[1] Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA
关键词
Citrus limon; inter-simple sequence repeat; isozyme; simple sequence repeat; restriction fragment length polymorphism; genetic diversity;
D O I
10.21273/JASHS.126.2.210
中图分类号
S6 [园艺];
学科分类号
0902 ;
摘要
Chloroplast DNA (cpDNA) restriction fragment length polymorphisms were used to study the parentage of lemons [Citrus limon (L.) Burm. f.] and several other putative hybrids. The 30 citrus accessions studied included nine lemons, three pummelos [C. maxima (Burm.) Merrill], three citrons (C. medica L.), three mandarins (C. reticulata Blanco, C. clementina Hort. Ex. Y. Tan., and C. sunki Hort. ex. Tan.), and single representatives of 13 other taxa. Pour different fragments of citrus cpDNA were amplified by polymerase chain reaction using four universal chloroplast primers and amplification products were digested with four endonucleases, Rsa I, Dra I, Hae III, and Mbo I. A total of 104 different restriction fragments were scored and used for phylogenetic analysis by parsimony. The three taxa which have been proposed as ancestral Citrus L. sp., C medica, C. maxima, and C. reticulata, had distinct cpDNA patterns. Pommelo contributed the chloroplast genome to lemons, sweet orange [C. sinensis (L.) Osbeck], and Bergamot orange(C. bergamia Risso and Bolt.), and mandarin contributed the chloroplast genome to rough lemons (C. jambhiri Lush.), Rangpur lime (C. limonia Osbeck), and 'Mexican' lime [C. aurantifolia (Christm.) Swing.]. Data suggest that the particular accessions of these ancestral species that were studied were not directly involved in the hybridization events that created these hybrids, since they have similar but not identical cpDNA restriction fragments. Using inter-simple sequence repeat markers that amplified from nuclear genomic DNA, a set of samples including pummelos, citrons, mandarins, sour oranges (C. aurantium L.), and 'Samuyao' papeda (C,micrantha Wester) were tested as possible parents of lemons. Sour orange and citron together had an nuclear and chloroplast fragments found in lemon and are therefore proposed to be the maternal and paternal parents, respectively, of many commercial lemon cultivars, including 'Lisbon', 'Eureka', 'Villafranca', and 'Monachello'.
引用
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页码:210 / 215
页数:6
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