Quantitative trait loci controlling flowering time and related traits in a Solanum lycopersicum x S. pimpinellifolium cross
Quantitative trait loci controlling flowering time and related traits in a Solanum lycopersicum x S. pimpinellifolium cross
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DOI：
10.1016/j.scienta.2007.12.003
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发表时间：
2008-04-04
影响因子：
4.3
通讯作者：
Sugiyama, Nobuo
中科院分区：
文献类型：
--
作者：
Cagas, Cyd Celeste;Lee, O. New;Sugiyama, Nobuo
开花期是决定番茄早期产量的重要因素。然而，控制开花时间的数量性状位点（QTL）及其与其他形态和生理性状QTL的关系尚未得到很好的研究。本研究的目的是同时定位控制开花天数（DTF）和其他性状（如第一花序前叶数（LN）、最大叶长（LL）、侧枝数（LS）、鲜重（FRW）和株高（PH））的染色体区域。这是使用来自商业栽培品种番茄cv. 'M570018'及其近缘野生种S. pimpinellifolium（PI 124039）。S.茴芹叶开花早于栽培番茄。植物生长在春季和夏季。复合区间作图检测到6个性状的16个QTL。这些QTL可解释10-42%的个体表型变异。春季检测到的QTL与夏季检测到的QTL没有显著差异。在第1染色体上，DTF QTL与LL、LS和FRW QTL共定位，在第3染色体上，DTF QTL与LN、FRW（夏季）和PH QTL共定位。pimpinellifolium等位基因促进开花。DTF QTL与LN QTL的共定位表明，DTF QTL位于第3染色体上，控制着从营养期到生殖期的时间。DTF QTL与其他性状的共定位可能是单个基因或多个基因通过性状间的生理关系发挥的多效性效应，因为它们之间存在极显著相关。(C)2007 Elsevier B. V.保留所有权利。
Flowering time is an important factor determining early yield in tomato. However, the quantitative trait loci (QTLs) controlling flowering time and their relation to other QTLs for morphological and physiological traits have not been well studied. The aim of this study was to map the chromosomal regions controlling days to flowering (DTF) concurrently with other traits, such as the number of leaves preceding the first inflorescence (LN), length of the largest leaf (LL), number of lateral shoots (LS), fresh weight (FRW) and plant height (PH). This was undertaken using an inbred backcross population derived from a cross between the commercial cultivar Solanum lycopersicum cv. 'M570018' and its close wild relative S. pimpinellifolium (PI124039). S. pimpinellifolium flowers earlier than the cultivated tomato. Plants were grown in spring and summer. Composite interval mapping detected 16 QTLs for the six traits evaluated. These QTLs explained 10-42% of the individual phenotypic variation. QTLs detected in spring generally did not differ from those detected in summer. In chromosome 1, the DTF QTL was co-located with the QTLs for LL, LS and FRW, while in chromosome 3 it was co-located with the QTLs for LN, FRW (summer) and PH. One DTF QTL that was detected in chromosome 3 and conferred by the S. pimpinellifolium allele hastens flowering. The co-location of the DTF QTL with the LN QTL suggested that the DTF QTL in chromosome 3 controls the period from the vegetative to reproductive phase. Co-locations of DTF QTLs with the other traits might be pleiotropic effects of a single gene or cluster of genes via physiological relationships among traits because they were found to be highly significantly correlated. (C) 2007 Elsevier B.V. All rights reserved.