Volume 71 Number 1 Article 4 Pages: 29-33
Year 2017 Month 1
Title: Effect of the Seedlessness (Fs) Gene in Fruit Quality Traits in Mandarin Segregating Populations
Authors: Zach Tucker, Dario J. Chavez, and Jose X. Chaparro
Xenia and metaxenia effects can be responsible for variation in fruit size, fruit shape, and sugar content in
In the process of developing new mandarin citrus hybrids, the University of Florida Fruit Tree Breeding
Program produced four populations segregating for the seedlessness gene Fs.
The objective of this research was
to determine if the presence or absence of seed had xenia-like effects on the mandarin hybrids.
The four populations
contained a total of 213 trees.
The fruit produced by these trees were evaluated by sampling three random
fruit and measuring the soluble solids concentration (SSC) of each fruit.
Additionally, the fruit were scored for
the presence or absence of a fruit neck at the stem end.
There were no statistically significant differences between
seedless and seeded offspring in the four hybrid populations for fruit weight (g) or SSC (% w/w). The “neck”
phenotype also appears to be controlled by a single locus and follows a Mendelian segregation ratio of 3:1 (neck:
flush). These results support the use of the seedless gene Fs without negative effects on fruit size and sugar concentration
in the resulting progeny.
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