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Cucurbit Genetics Cooperative Report 6:68 (article 34) 1983

The Inheritance of the 'Moon and Stars' Variegation in Citrullus lanatus

B. B. Rhodes, Gary Nepa and Stephen Love

Clemson University, Edisto Experiment Station, Blackville, SC 29817

Seeds from an old cultivar of watermelons, labeled 'Moon and Stars', were obtained from an unidentified farmer in North Carolina several years ago. Its origin is not known. The 'Moon and Stars' pattern is an impressive number of yellow spots, varying in size from microscopic to large portions of the leaf at maturity, that begins to appear on the first true leaf. It has no effect on the vigor of the plant. The fruit are also variegated, but the color of the flesh is not affected.

A cross was made with a pale seedling mutant. The F1 progeny were all spotted, the F2 progeny segregated 3:1 spotted:normal, reciprocal backcrosses with normal parent segregated 1:1, and the backcross with the spotted parent produced all spotted progeny, One backcross with the normal parent did not fit a 1:1 segregation ratio. Some spotted seedlings were probably not scored because seedlings were examined before the full development of the first true leaf (Table 1).

It is concluded that 'Moon and Stars' is a simple dominant character.

Table 1. Segregation of 'Moon and Stars' variegation pattern in parents, F1, F2, and backcross progeny in Citrullus lanatus.


Generation

Classes


Expected ratio

X2

p

Spotted

Nonspotted


'Moon and Stars' (M&S)

All

None

1:0

0

1.0

Pale Seedling (ps)

None

All

0:1

0

1.0

F1

All

None

1:0

0

1.0

F2

130

46

3:1

0.49

0.50–0.75

 

51

17

3:1

0.00

>0.99

F1 x ps

54

88

1:1

8.14

0.001–0.01

 

77

93

1:1

1.52

0.20–0.30

F1 x M&S

181

0

1:0

0

1.0

ps x F1

84

74

1:1

1.38

0.20–0.30


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Page citation: Wehner, T.C., Cucurbit Genetics Cooperative;
Created by T.C. Wehner and T. Ng, 1 June 2005; design by C.T. Glenn;
send questions to T.C. Wehner; last revised on 1 August, 2007