SUMMARIES OF Till, m lOLOGIC CHARA< 



286 



.U from the 

 again in the 



-.1111. i rots (we Bmntdoitna) ; luit 

 here again in the final dimming up there i* usually 

 found t<> U> a .II-ML ; iii.ij,.r.t\ of the reactions leaning 



tlxT par. nt. It i- unfortunate that 



frequently the data have not l*vn reoordfld in accord- 



. itli the plan adopt, d at tin- outotart <>( the research 



so as to leave iu> ilul>t in each character or character- 



phai" i rental relationships of the hybrid, such a 



ir-u-.i in mik.!',;; t : ipuantitat n nation*. 



this .1. necessary to present theae 



in a modified tabular form, and with the \ u-w 

 part: the fluctuating relationship* of 



In the preparation of the 



follow (Tables C 1 to C 17 i. th- properties of 



: tli.'ir parental relationships have been 



I,-..! llectivcl n Id -. << ni _ : thd 



sion* of the tables, those of form 



n as one designation, those with a given rea- 

 ie designation, ami o on. The p/tu *i<jn is to 



as meaning that in the final summing up 



.ta of each designation the hybrid in it-* unit- 



i-haractcr and unit- liara- tor-phase bears, on the whole, 



-nship to the parent indicated at the head 



linn. The r/iiiiux sign is, of course, the nega- 



!ie former ; while tin- />/n.-minu.< sign 



null. :ie hybrid r. -emMes in degree one as ma h 



a- tl. ;rent. In tlu> last itilumn tin- terms tXCttt 



and in that a unit-character or unit-character- 



phac is developed in excess or deficit <>f parental ex- 



trvmcs; \ndiridtial means that a unit-character or unit- 



character-phase has been discovered in the hybrid that 



wax not observed in either parent 



ruin apparently minor peculiarities have been dis- 

 regarded in this tabulation. In some instance.- it i* 

 <rl)itrary whether we regard a given property as 

 (1 in excess or deficit of parental extremes. 

 Thus, if the grains of the hybrid be more irregular, or 



ntttm** to reagents greater, than those of the 

 parents, are we to look upon the difference as being an 

 . ticreased or decreased development ? Ten- 

 rcnces have been taken as represent- 

 icreased derelopm< nt ; and, if there be leas irregu- 

 or lees resist n i; e, the opposite. It is obvious that 

 these tablet indicate merely very grossly certain promi- 

 ; >basea of hybrid and parental relationships, and that 

 the coeUati must be studied therewith in order that the 



(a) Brurudonna tandcrec alba (tame parentage as foUouing hybrid). 

 TABLE C \.-Bruntdonmatmdrrmelba. 



qualitative and quantitative ilu> tuations ,,f tlie Inbrid in 

 . each parent can properlv be understood. In 

 the several sets of tables that follow, the symbols 9, d* 

 and 9 = <J are used as sex designation* to indicate nearer 

 the seed parent, nearer the poll, n parent, and equally 

 related to both, rv> , The symbol $ in Tables 



F. 1 to :.". and II. 1 to ': indicates that the reactions 

 are too fast or too slow for satisfactory different i 

 or that because of fluctuations in the courses of gela- 

 t miration there is either no satisfactory differentiation 

 or sufficiently definite inclination t<> either parent. The 

 data of the quantitative reaction* are taken from the 

 various tables of the reaction intensities expressed by 

 the percentage of total Ktar.li -.Lit m >. .1 at definite t 

 intervals that cuiistitute tin- third M-etion ,.i eaeh MIIII- 

 mary in Chapter III, and also tabulated in modified ar- 

 rangement in Set tion 4 of this chapter. These data have 

 also been presented in the form of chart* in Chapter IV. 



It is important to note that in the studies of the quali- 

 t4iti\e rcHrtionM the reagents selected varied somewhat 

 in number and kind in the different seta of parent) and 

 hybrids and that in the formulation of these tables the 

 quantitative reactions given arc limited to those of the 

 reagents ucd to elicit the qualitative reactions. Hence, 

 in the summing up in these tallies of the relationships of 

 the reactions of the hybrids to those of the parents there 

 may seem to be some discrepancies when the figures are 

 coinpare.1 with tin*.- of Tables E, 1 to 28, F, 1 to 50, 

 and II, 1 to 26. For instance, in the quantitative reac- 

 tions of Ilruiijtiliinna Mnilrnr alba it will be noted that 

 of the H reaction* with the chemical reagents none is like 

 that of the seed parent, pollen parent, or l>th parents, 

 1 is intermediate, 1 is lusher than that of either parent, 

 and 6 arc lower than thorn of cither parent. When, 

 however, all of the VM reactions are summed up it is 

 found (Tahlc F, 1) that 4 arc the same as those of seed 

 parents, none the same as those of the pollen parent, 1 

 the same as those of both parents, 5 intermediate. 3 

 higher than those of the parent*, and 13 lower than tho e 

 of the parents. 



The limited quantitative data given in Tables C 1 

 to C 17 arc mainly for comparisons with the qunlr 

 reactions with the same reagents, the data of this kind 

 being tabulated in full in tables E, F, and II. Limited 

 comment only is necessary in explaining this series of 



M what*, to UM- 



8c*d parrot. Pollen paraoi. 



I:. :...:.. 



l 



(UUMitjr) practically tune M 9 



8am* 9 

 MM* I 



Very 

 Vry 



lowrr Uuui rithw parrot <f 

 lower than Mktt parrot 9 

 parrot 9 



MMk km than Um parent <? 

 Murfa low* than (Hkw parrot <f 

 Much lower than citber parent <f 



