Quantitative genetic analysis and comparison of physical and sensory descriptors relating to fruit flesh firmness in apple (Malus pumila Mill.)
Quantitative genetic analysis and comparison of physical and sensory descriptors relating to fruit flesh firmness in apple (Malus pumila Mill.)
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DOI：
10.1007/s001220051389
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发表时间：
2000-05-01
影响因子：
5.4
通讯作者：
Verhaegh, J
中科院分区：
文献类型：
--
作者：
King, GJ;Maliepaard, C;Verhaegh, J
质构是消费者对苹果食用品质偏好的一个重要组成部分。对与果肉硬度相关的性状进行了数量遗传分析。这是基于隔离在6个站点和收获超过2年的一个重复映射人口。比较了不同的评估方法，并进行了主成分分析。所用的仪器测量是Magness-Taylor硬度计读数，声共振硬度，以及由训练有素的小组评估的一系列感官描述符。一些措施之间有很好的相关性，虽然刚度相关性差。虽然基因型对环境的影响很大，但显着的影响可归因于基因型，这些都被用来检测QTL。在7个连锁群上检测到显著的QTL，其中对连锁群L01、L10和L16的影响较大。虽然有一个游泳池：由于声学刚度与其他测量之间的相关性，在连锁群L10上检测到的刚度的显著和暗示性QTL确实代表了声学刚度测量检测到的显著QTL的子集。利用感官评价方法检测代表果实质地不同属性的QTL具有重要的应用价值。显著QTL之间的相互作用的可能性：毛皮果实质地和其他强烈选择的性状，如赤霉病抗性和果实酸度的解决。
Texture is a major component of consumer preference for eating-quality in apple. A quantitative genetic analysis of traits associated with fruit-flesh firmness was carried out. This was based on segregation in an unselected mapping population replicated at six sites and harvested over 2 years. Different methods of assessment were compared, and a principal components analysis carried out. Instrumental measures used were Magness-Taylor penetrometer readings, stiffness by acoustic resonance, and a range of sensory descriptors assessed by a trained panel. There were good correlations between some measures, although stiffness was poorly correlated. Whilst genotype by environment effects were large, significant effects were attributable to the genotype, and these were used to detect QTLs. Significant QTLs were detected on seven linkage groups, with large effects on linkage groups L01, L10 and L16. Whilst there was a pool: correlation between acoustic stiffness and other measures, the significant and suggestive QTL detected for stiffness on linkage group L10 did represent a subset of significant QTLs detected for the penetrometer measure. The use of sensory assessment proved valuable in detecting QTLs representing different attributes of fruit texture. The possibility of interaction between significant QTLs: fur fruit texture and other strongly selected traits such as scab resistance and fruit acidity is addressed.