402 



The Jolrnal of Heredity 



THE INFLUENCE OF A SINGLE SEED. 



The influence of pollination in some varieties of Kaki is lo darken the flesh. 

 In this variety (Zengi) one seed produces a distinct darkening of the 

 flesh around it, but it is not sufficient to darken the whole area of the 

 fruit. {Fig. 7.) 



colored when seedy, we shall call Polli- 

 nation Variants. Now, all varieties of 

 D. kaki growing in this country or else- 

 where may be referred to one or the 

 other of these groups. If varieties 

 which are constantly dark fleshed 

 whether seedy or seedless should be 

 found, the group of Pollination Con- 

 stants can then be divided into two 

 groups of light and dark fleshed Polli- 

 nation Constants. It is hardly ]jrobable 

 that there are varieties which are dark 

 fleshed when seedless and light fleshed 

 when seedy, but if any such should be 

 discovered, a similar plan can be fol- 

 lowed by dividing the group of Polli- 

 nation \'ariants. 



The varieties with the fruit of which 

 we are acquainted at this time divide 

 along these lines of classification as 

 follows : 



Pollinnlion Cnuslauts. (iroup I. 



Costata, Hachiva, Lienhua (No. 22,?07) New 

 Sien (No. 22368),' Ormond, Phelps Siang (No. 

 21910), Tamopan, Tanenashi, Triuni])ii, Tsuru. 



Pollination Variants. (Iroup 11. 



Dai Dai Maru, Gailey, Godbey, Hyakume, 

 Loncstar, Masugata, Mvotan, Nectar, Okame, 

 Taber No. 23, Taber' No. 120, Yeddoichi, 

 Yemen, Zengi. 



The amount of dark (k-sli foiuid in 

 fruits (^f varieties of the group Pollina- 

 tion Variants depends both upon the 



nimiber of seeds and u])on their location 

 with reference to one another. Refer- 

 ring to cross sections of fruits of the 

 Pollination Variants, it will be noted 

 that when only one seed is present the 

 whole area is not darkened and the 

 seed roughly forms the center of the 

 darkened area which may be more or 

 less interrupted by the gelatine-like 

 development of the walls of the empty 

 loctiles included within the circle. If 

 two seeds are present in adjoining 

 locules, it will be noted that while the 

 area is increased and in some cases 

 shows darker owing to the overlapjjing 

 of the affected areas, yet the whole area 

 in cross section is not darkened. If two 

 seeds are present, diametrically opposite 

 one another, the whole area, if not too 

 great, may be darkened. Three or four 

 seeds properly located are tisuall\- 

 accom])anied by an entire darkening 

 of the surface. In large specimens of 

 Yemon, this is sometimes not the case 

 and occasionally specimens may be 

 found with nearly or quite the full 

 comi^lement of seeds which show a 

 narrow light band just inside the skin, 

 while the remainder is all darkened. 



In fruits of both Hyaktimc and 

 ^'^"m()n, it a]jpears to require the 

 (kxc'lopniL-nt of a larger number of 

 seeds to darken the entire area than is 

 the case with smaller varieties such as 



