NAHCIS8U8. 



deficit in relation t<> tin- parents. (Tables A 23 and 

 CharU 1 



Tin- ii-.i. tivities of the hybrid an- the same as tbow 

 of the wed pan-lit in tin- n-actiom. with polarization, i 

 ilnif. gentian violet, and sulphuric acid ; the same as 

 .. }..ir. n: in iii.ni-; the same M th(M 

 of I.- tin- safranin inaction; intermediate 



in those with temperature, chloral hydrate, and p\r. 

 gallic and. in two being closer to thow of the pollen 

 parent and in one as cloae to one M the other parent: 

 HfjsMl in the nitric-acid reaction, and closer to the 

 jH.ik-ii parent; and lowest in the chromic-acid reaction, 

 lit'ing closer to the teed parent. 



Tlu- following is a summary of the reaction-intensi- 

 ties ( 10 reactions) : Same as seed parent, 4 ; same as pol- 

 l.-n par. nt. ; same as both parents, 1 ; intermediate, 3 . 

 highest, 1 ; lowest, 1. 



From the foregoing data it seems that the seed 

 parent exercises a distinctly greater influence than the 

 pollen parent on the characters of the starch of the 

 hyhrid. The most marked tendencies in the reactions 

 are to sameness as the seed parent and to intenne- 

 diatenaaa. 



MPOSITE CURVES or REACTION-INTENSITIES. 

 This section treaU of the composite curves of the 

 reaction-intensities, showing the differentiation of the 

 starches of \arcitttu leedtii minnie htunt, N. trian- 

 dna albtu, and A', agnet hanty. (Chart K 23.) 



most conspicuous features of this chart are : 

 ( 1 ) The very close correspondence of all three curves 

 in course and closeness throughout the chart 



i In A 7 , leedsii minnie hume in comparison with 

 the other parent the higher gentian-violet and chloral- 

 hydrate reactions; the lower reactions with polarization, 

 iodine, temperature, chromic acid, pyrogallic, and nitric 

 acid ; and the same or practically the same in the reac- 

 tions with saf ranin and sulphuric acid. 



(3) In y. leedtii minnie humt the very high sul- 

 phuric-acid reaction ; the high iodine reaction ; the mod- 

 erate polarization and saf ranin reactions; the low reac- 

 tions with gentian violet, temperature, chromic acid, 

 pyrogallic acid, and nitric acid; the very low reaction 

 with chloral hydrate. 



(4) In A*. Iriandnu albtu the very high sulphuric- 

 acid reaction; the high iodine reaction; the moderate 

 reactions with polarization, safranin, chromic acid, and 

 pyrogallic acid ; the low reactions with gentian violet, 

 temperature, and nitric acid ; and the very low reaction 

 with chloral hydrate. 



(5) In the hybrid the very high sulphuric-acid reac- 

 tion; the high iodine reaction; the moderate polariza- 

 tion and safranin reactions ; the low gentian-violet, tem- 

 perature, chromic-acid, pyrogallic-acid, and nitric-acid 

 reactions ; and the very low chloral hydrate reaction. 



The following is a summary of the reaction-intensi- 

 ties (10 reactions) : 



MI-AKI80N8 Or THE Si AK. I IM Or \AKC!MU 

 EMPEKOR, N. Tfci ALBUSJ. AMD N. J. T. 



BENNETT POE. 



Iii hi>tolni:ir characteristics, polarisoopic figures, 

 reactions with selenite, reactions with iodine and quali- 

 tative reaction* with the various chemical reap UN, the 

 Ktarches of the parents and hybrid .-\lnl.it pr 

 common in varying degree* of d.-w-l.,pinrnt wi.i.-h col- 

 lectively in case of each starch an- distinctm'. The 

 differences are of a minor character. In histologic prop- 

 erties in A'cimwtu triandrut albtu in comparison with 

 the other parent there are more compound grains and 

 aggregates, together with various other peculiarities, 

 and there arc various other differences in hilum, lamella*, 

 and size. The polariscopic figure is not so distinct 

 but more often well defined, and there are other minor 

 differences. With selenite the quadrants are more often 

 clean-cut, the colors less often pure, and fewer grains 

 with a greenish tinge. In the qualitative reactions with 

 iodine no distinctive differences were recorded. In the 

 qualitative reactions with chloral hydrate, chromic acid, 

 pyrogallic acid, nitric acid, and sulphuric acid both 

 methods of gelatinization common to both starches occur, 

 and also methods observed in A', truuulnu albtis that 

 are not seen or seen only in modified form in A', emperor. 

 The starch of the hybrid contains fewer compound 

 grains and aggregates than either parent, and shows, 

 mi the whole, a closer relationship to A', emperor than 

 to the other parent In character and eccentricity of 

 the hilum and in size the relationship is closer to N. 

 emperor; but in the character of the lamella; closer to 

 A*, triandnu alb us. In the character of the polariza- 

 tion figure and in the reactions with selenite the relation- 

 ship is closer to A 7 , triandnu albtu. In the qualitative 

 relictions with iodine the raw grains are more closely 

 related to those of N. emperor, but the gelatinized grains 

 show no differences from those of both parents. In the 

 qualitative reactions with the chemical reagent* the in- 

 fluences of both parents are manifest; in the chloral 

 hydrate and sulphuric acid the resemblances are closer 

 to A*, emperor, while in the chromic acid, pyrogallic acid, 

 and nitric acid the hybrid is closer to A 7 , triandnu albtu. 



Rrartion-intmilici Krprttvd by Light. Color, and Tempera- 

 ture Reaction*. 

 Polarisation: 



N. emperor, low to high, value BO. 



N. triandnu albue, low to high, lower thmn in N. Rnpcror. viJur SO. 



N. j. t. bennett poe. low to high, the MOM M in N. triandnu alba*. 



value 00. 

 Iodine: 



N. emperor, moderate to deep, value 00. 



N. triandrua albu*. moderately deep, deeper than in N. emperor, 



value 66. 

 N. j. t. bennett poe. moderate to deep, the earn* ae in N. emperor. 



TatueOO. 

 Gentian violet: 



N. emperor, moderate, value 45. 



N. triandrut albu*. licht to moderate. lihter than in N. emperor. 



value M. 



N. j.t. bennett poe, moderate, deeper than in either penal, value 60. 

 SeJranin: 



N. emperor, moderate, value 60. 



N. triandnu albu*. liht to moderate, lighter than in N. emperor. 



value 40. 

 N. J.t. bennett poe, moderate, deeper than in either parwit. value 86. 



