June, '14] MENDELISM IN MELONS. 13 



fl 



ever, was much smaller than in either of the parents (see Fig. 2). 

 Seeds from this melon were used to carry on the breeding work. 



During the season 1911 three of the college greenhouses were 

 devoted to muskmelons in order to carry on the breeding work 

 commenced during the season 1908 — F3 generation. Nine 

 distinct types of the hybrids were selected and fifteen plants 

 from each were used in the experiment. 



Seeds from the following melons were selected as differing 

 materially in various attributes from each other: Nos. 23; 13; 

 70; 68; 27; 26; 17; 24; 34. 



One hundred and thirty-five plants were grown on the benches; 

 careful treatment regarding cultivation and fertilization was 

 afforded them as in previous years. 



Season 1912. Seeds of hybrid melons No. 27 and No. 34 were 

 selected for the purpose of ascertaining whether a pure hybrid 

 type has been fixed in these hybrids, melon No. 27 having a 

 green skin and melon No. 34 a yellow skin. Both these hybrid 

 melons were close pollinated. 



Season 1913. Seeds of melons No. 27 and No. 34 which were 

 close pollinated season 1912 were tested out to confirm work in 

 fixation of type, and resulted in a duplication of F4 generation, 

 thereby proving fixation of type in these hybrids. 



The work indicates that when such pairs of characters as are 

 here considered have been crossed, they show a blend in the Fi 

 generation rather than dominance of either character. In the 

 F2 generation the segregation of dominant and recessive charac- 

 ters occurs. 



Six pairs of characters have been studied in the melon, and show 

 dominance and recessiveness as follows : 



DOMINANT RECESSIVE 



Yellow Color of Skin Green Color of Skin 



Round Form of Fruit Obtuse-elliptical form of fruit 



Large Size of Seeds Small Size of Seeds 



Ribbing Non ribbing 



Netting Smoothness 



Large Size of Fruits Small Size of Fruits 



