Genetic mapping and QTL analysis of fruit and flower related traits in cucumber (Cucumis sativus L.) using recombinant inbred lines

被引:0
|
作者
X. J. Yuan
J. S. Pan
R. Cai
Y. Guan
L. Z. Liu
W. W. Zhang
Z. Li
H. L. He
C. Zhang
L. T. Si
L. H. Zhu
机构
[1] Shanghai Jiaotong University,School of Agriculture and Biology
[2] Shenyang Agricultural University,College of Horticulture
[3] Chinese Academy of Sciences,Institute of Genetics and Developmental Biology
来源
Euphytica | 2008年 / 164卷
关键词
Composite interval mapping; Fruit and flower traits; Linkage map; SRAP;
D O I
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中图分类号
学科分类号
摘要
A set of 224 recombinant inbred lines (RILs) derived from a narrow cross between two fresh eaten types (S94 (Northern China type) × S06 (Northern European type)) (Cucumis sativus L.) was used to construct a genetic linkage map. With the RILs a 257-point genetic map was constructed including 206 SRAPs, 22 SSRs, 25 SCARs, 1 STS, and three economically important morphological markers (small spines (ss), uniform immature fruit color (u), dull fruit skin (D)). The seven linkage groups covered 1005.9 cM with a mean marker interval of 3.9 cM. The ss locus was linked to D and u, and they were all on Linkage group 6. The RIL map contained a total of 51 sequence-specific markers, which made possible the comparison of molecular linkage maps developed in different laboratories. Using the F6:7 derived families, a total of 78 QTLs were detected with relatively high LOD scores (2.9–84.4) for nine fruit-related traits (fruit weight, length, and diameter, fruit flesh thickness, seed-cavity diameter, fruit-stalk length, fruit pedicel length, length/diameter and length/stalk ratio) and three flower-related traits (first flower node, first female flower node and female flower ratios). Several sequence-anchor markers (CSWCT25, CS30, CMBR41, CS08 etc.) were closely linked with some QTLs for fruit weight, fruit length, fruit flesh thickness and sex expression, which can be used for the future marker-assisted selection to improve the fruit traits in cucumber breeding.
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页码:473 / 491
页数:18
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