Genetic analysis of traits distinguishing outcrossing and self-pollinating forms of currant tomato, Lycopersicon pimpinellifolium (Jusl.) Mill.
Genetic analysis of traits distinguishing outcrossing and self-pollinating forms of currant tomato, Lycopersicon pimpinellifolium (Jusl.) Mill.
复制标题
区分醋栗番茄、Lycopersicon pimpinellifolium (Jusl.) Mill 异交和自花授粉形式的性状的遗传分析。
作者：
Michael S. Georgiady;R. Whitkus;E. Lord
近亲繁殖的进化在被子植物中很常见，尽管人们对其发育和遗传过程知之甚少。番茄（Lycopersicon pimpinellifolium）是一种自交亲和种，异交率的变化与花形态有关。来自近亲繁殖和异交群体的成熟花在影响交配行为的性状（花瓣、花药和花柱长度）上差异很大；其他花的部分（萼片，子房）显示最小的差异。对两个不同自然居群的代表性自交和异交植株进行了遗传行为分析，包括数量性状位点（QTL）定位。分析了6个形态性状：单花序花数；花瓣，花药和花柱长度；以及花药可育和不育部分的长度。所有性状在自交亲本中均较小，且在F(2)中呈连续分离模式。各性状间表型相关均为正相关，但相关强度各不相同。利用48个RFLP标记进行数量性状位点定位。共发现5个QTL，涉及花药总长度、花药不育长度、花柱长度和花序花数6个性状中的4个。这4个性状对表型变异的QTL均为主要效应（约25%）。
The evolution of inbreeding is common throughout the angiosperms, although little is known about the developmental and genetic processes involved. Lycopersicon pimpinellifolium (currant tomato) is a self-compatible species with variation in outcrossing rate correlated with floral morphology. Mature flowers from inbreeding and outcrossing populations differ greatly in characters affecting mating behavior (petal, anther, and style lengths); other flower parts (sepals, ovaries) show minimal differences. Analysis of genetic behavior, including quantitative trait locus (QTL) mapping, was performed on representative selfing and outcrossing plants derived from two contrasting natural populations. Six morphological traits were analyzed: flowers per inflorescence; petal, anther, and style lengths; and lengths of the fertile and sterile portions of anthers. All traits were smaller in the selfing parent and had continuous patterns of segregation in the F(2). Phenotypic correlations among traits were all positive, but varied in strength. Quantitative trait locus mapping was done using 48 RFLP markers. Five QTL total were found involving four of the six traits: total anther length, anther sterile length, style length, and flowers per inflorescence. Each of these four traits had a QTL of major (>25%) effect on phenotypic variance.
导致群体之间和群体内数量变异的基因的最小数量。
影响因子：
3.3
作者：
Lande,R
通讯作者：
Lande,R