Mapping for Axillary Shooting, Flowering Date, Primary Axis Length, and Number of Leaves in Pepper (Capsicum annuum)
Mapping for Axillary Shooting, Flowering Date, Primary Axis Length, and Number of Leaves in Pepper (Capsicum annuum)
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DOI：
10.2503/jjshs1.79.56
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发表时间：
2010-01-01
影响因子：
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通讯作者：
Hirai, Masashi
中科院分区：
文献类型：
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作者：
Mimura, Yutaka;Minamiyama, Yasuhiro;Hirai, Masashi
以铃型辣椒品种‘California Wonder’和马来西亚小果品种‘LS2341’为材料，利用两个辣椒品种杂交产生的加倍单倍体群体，对辣椒生长性状进行了QTL分析。利用简单序列重复序列和扩增片段长度多态性标记构建了该群体的遗传图谱。该图谱全长1213 cM，由15个连锁群组成。对94个F1DH家系的腋芽、开花期、主轴长度、主轴叶片数和平均节间长度进行了测定。通过区间分析确定了12个QTL，每个QTL对表型变异的贡献率为14%~34%。第2、3、12号染色体和8号连锁群(LG8)上的标记与这些性状的QTL相关联。结果表明，1G8的生长性状有2个座位，其中一个座位主要影响轴长，对开花影响较小，另一个座位对开花期影响较大，对轴长影响较小。
A quantitative trait locus (QTL) analysis of pepper growth traits was performed using a doubled haploid (DH) population derived from a cross between two Capsicum annuum genotypes, a bell-type cultivar 'California Wonder' and a Malaysian small-fruited cultivar 'LS2341'. Simple sequence repeats and amplified fragment length polymorphism markers were used to construct a genetic map for this population. The map spans 1,213 cM, and consists of 15 linkage groups (LGs). The axillary shooting, flowering date, primary axis length, number of leaves on primary axis and mean internode length were evaluated in 94 F1DH families. Twelve QTLs were identified by interval analysis, and each QTL accounts for 14 to 34% of the phenotypic variation. Markers on chromosomes 2,3,12, and linkage group 8 (LG8) were associated with QTL for these traits. The present analysis revealed 2 loci for the growth traits in LG 8. One affected mainly axis length and had a minor effect on flowering, while the other had a large effect on flowering date and a smaller effect on axis length.