The recessive trait for fruit shape is
Answers
Answer:
hiii
Explanation:
The fruit shape is important quantitative trait closely related to the fruit quality. However, the genetic model of fruit shapes has not been proposed. Therefore, in the present study, analysis of genetic effects for fruit shape traits (fruit length and fruit perimeter) in sponge gourd was conducted by employing a developmental genetic model including fruit direct effects and maternal effects. Analysis approaches of unconditional and conditional variances were applied to evaluate the genetic behavior of fruit shape traits at economical and physiological maturation times.
Phenotypic means of generations
The means of parents and F1 generations of fruit length and fruit perimeter showed that there was large variation among materials studied at two maturation stages (Table (Table1).1). The phenotypic values of both shape traits differed considerably among the 7 cultivars over two maturation stages. Range at 12 d (12 d after flowering) was smaller than that at 60 d (60 d after flowering), for example, the range for fruit length was from 33.81 to 84.10 cm at 12 d and from 39.27 to 102.36 cm at 60 d, for fruit perimeter from 13.02 to 26.50 cm at 12 d and from 18.11 to 31.79 cm at 60 d. The means of the two shape traits increased relatively rapidly from initial time to the economical maturation time, and maintained the increasing tendency from economical maturation time to the physiological maturation time. These revealed that the variations of the two fruit shape traits in sponge gourd might be influenced by genotypic and maternal effects and might be different at various maturation stages.
Rr Round
rr wrinkled
R is a dominat trait
r is a recessive trait , so it expresses only in homozygous condition.
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