QTL Analysis of Tuber Dormancy and Sprouting in Potato
QTL Analysis of Tuber Dormancy and Sprouting in Potato
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DOI：
10.1007/s12230-018-9638-0
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发表时间：
2018-08-01
影响因子：
1.5
通讯作者：
Douches, D. S.
中科院分区：
文献类型：
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作者：
Bisognin, D. A.;Manrique-Carpintero, N. C.;Douches, D. S.
块茎休眠和萌发是商品马铃薯品种的重要特性。由于野生茄属植物在育种中可以贡献新的等位基因，我们将茄属植物和白果茄属植物组合在一个作图群体中，建立了与全基因组标记的连锁图谱，并对块茎休眠和萌发进行了数量性状基因座(QTL)的定位。所评价的性状存在遗传变异，休眠与顶端优势释放之间存在高度相关(0.80)。块茎休眠和萌发性状的QTL被定位在第2、3、5和7号染色体上相同或相似的位置，解释了9.5%~16.3%的表型变异。我们确定了与所有主要植物激素调控相关的候选基因，这些基因与QTL紧密连锁。位于第2、3和7染色体上的QTL与休眠和顶端优势释放相关，对延缓或加速块茎萌发具有重要意义，是标记辅助育种的理想候选基因。
Tuber dormancy and sprouting are important traits in commercial potato varieties. Since wild Solanum species can contribute new alleles in breeding, we combined Solanum chacoense and S. berthaultii species in a mapping population to develop a linkage map with genome wide markers and identify quantitative trait loci (QTL) for tuber dormancy and sprouting. There was genetic variation for the evaluated traits and high correlation (0.80) between dormancy and apical dominance release. QTL for tuber dormancy and sprouting traits were mapped to the same or similar positions on chromosomes 2, 3, 5, and 7, explaining from 9.5% to 16.3% of the phenotypic variance. We identified candidate genes associated with all major phytohormone regulation in close linkage with the QTL. The QTL on chromosomes 2, 3 and 7 are good candidates for marker assisted breeding, since they were associated with dormancy and apical dominance release and should be useful to delay or accelerate tuber sprouting.