No. 3, December, 1920] GENETICS 165 



1137. Urban, J. Uber die Farbe des Riibenkrautes fruh und spatreifender Ruben. [On 

 the color of the plant of early and late-ripening beets.] Zeitschr. Zuckerrubenindus. Bohmen 

 42: 281-207. 1918.— See Bot. Absts. 6, Entry 1057. 



1138. van Herwerden, M. A. Over eenige nieuwe opvattingen in de celleer. [On some 

 new discoveries in cytology.] Genetica 1: 130-133. Mar., 1919— A discussion of the contin- 

 uity of the nucleus, for Long years an axiom of the cytology, but now by the beautiful researches 

 of Buchner (Arch. f. microscop. Anat. 91 : 1. 191S; no longer an axiom but a subject of research 

 that may perhaps give us a new view upon the ontogenetic origin and perhaps the phylo- 

 genetic origin of this most important part of the cell. The basiphile grains in the eggs of hy- 

 menopteres giving rise to accessory nuclei will give still much material for research.— .1/. J. 

 Sirks. 



1139. Volkart A. 40. und 41. Jahresbericht. Schweizerische Samenuntersuchungs- 

 und Versuchsanstalt in Oerlikon-Zurich. [40th and 41st Annual Reports. Swiss seed control 

 and experiment station in Oerlikon-Zurich.] Landw. Jahrb. Schweiz. 1919: 1-40. 1919. — 

 The station's breeding work on cereals, beans and beets is reviewed. The isolation of strains 

 by single-progeny tests and also improvement by repeated selections are mentioned. In 

 1913 hybridization was commenced. [From anonymous review in Zeitschr. Pflanzenziicht. 

 7: 142. Dec, 1919.]— J. P. Kelly. 



1140. von Caron-Eldingen. Physiologische Spaltungen ohne Mendelismus. [Physi- 

 ological segregation without Mendelism.] Deutsch. Landw. Presse 1919: 515-516. 1910. — 

 Author discusses thick-eared wheat infested with rust spores. The grain, whether treated 

 or not gave rise to some long-eared plants. In plats with untreated grain only the long-eared 

 were rusty. Author assumes a physiological segregation, not Mendelian in character, which 

 conditions the long-eared character and the susceptibility. [From anonymous review in 

 Zeitschr. Pflanzenziicht. 7: 114-115. Dec, 1010.1— J". P. Kelly. 



1141. von Ryx, Georg. Zahlenmiissige Bestimmung der Kornschonheit bei Braugerste. 

 [Numerical determination of beauty of grains in brewing barley.] Zeitschr. Pflanzenziicht. 6: 

 109-166. 2 fig. June, 1918. 



1142. von Tschermak, E. Beobachtungen uber anscheinende vegetative Spaltungen an 

 Bastarden und iiber anscheinende Spatspaltungen von Bastardnachkommen speziell Auftreten 

 von Pigmentierungen an sonst pigmentlosen Deszendenten. [Observations on apparent vege- 

 tative splitting in hybrids, and on apparently belated splitting in hybrid offspring, especially 

 the occurrence of pigmentation on otherwise pigmentless descendants.] Zeitschr. indukt. 

 Abstamm. Vererb. 21: 216-232. 1 fig. Nov., 1010. — Four cases of bud mutation in beans, bar- 

 ley, and peas, are given which occurred after a cross as follows: (1) a dark-seeded bean which 

 had bred true for 8 generations following a cross of dark- and light-seeded Scarlet Runner 

 beans gave one plant with both typical seeds and aberrant light-colored seeds with distinct 

 pattern; (2) a low-growing white-flowered plant resulting from a cross of Phaseolus multi- 

 florus X P. vulgaris again crossed by a low-growing red-flowered plant from same source 

 gave one plant in Fi with short stature during the summer but which late in the season began 

 to climb; (3) a barley variety with compact spikes crossed by a normal sort gave one plant 

 in Fi with two stalks, one of which had a normal spike the other compact; (4) a pea with yel- 

 low cotyledons crossed by another yellow-cotyledon kind gave one plant with one fully ma- 

 tured green seed among the usual yellow seeds. Such cases as these author considers to be 

 vegetative segregation and compares them with two instances of seed segregation of complex 

 nature in which appearance of new forms is delayed as (a) two white-flowered bean plants of 

 complex hybrid ancestry gave red flowers in Fi with normal segregation in F2. (b) a bean 

 plant with seeds having green cotyledons and green seed coats which bred true for 4 genera- 

 tions following a cross of a green by yellowish-brown-coated variety produced one plant with 

 all seeds having colored markings. Author holds that there is a relation between such delayed 

 segregations which at present cannot be distinguished from complex Mendelian phenomena 



