No. 2, September, 1920] GENETICS 190 



ered well classified. The Burt oat possesses a red factor and a yellow factor, which are quite 

 distinct from the Sixty Day factor. The Sixty Day yellow factor inhibits awning. The Burt 

 yellow carries no such inhibitor. The F 3 generation bears out most of the conclusions reached 

 in F>. The appearance of brown berries is attributed to mutation or reversion. — Alvin Kezer. 



1506. Frateur, J. L. La robe sauvage du lapin. [The wild coat of the rabbit. 1 Reunion 

 Soc. Beige Biol. 1919: 941-943. 1919. 



1507. Frets, G. P. De polymerietheorie getoetst aan de erfelijkheid van den hoofdvorm. 

 [Theory of polymery tested in the inheritance of head-form.] Genetica 2 : 115-136. Mar., 1920. 



1508. Fruwirth, C. Neunzehn Jahre Geschichte einer reinen Linie der Futtererbse. 

 [Nineteen-year history of a pure line of field peas.] Fiihlings landw. Zeitg. 69: 1-28. 1920. — 

 Study of variations in a pure line, in sense of Johannsen, of field peas breeding absolutely 

 true for three years to pink flowers and yellowish-green seed-coats. In succeeding years, 

 "spontaneous variations" occurred from time to time such as plants with red-purple flowers 

 and maple seed-coats, purple specked and purple-striped seed-coats, albino foliage, varie- 

 gated yellow and green or more rarely green and white foliage, and plants that either died 

 prematurely or set no pods or set pods, but matured no seeds. Detailed data given including 

 tables, of selection and crossing experiments with some of the variants of this pure line. 

 Only negative results obtained with selection lines. Variants may be regarded as phases 

 of eversporting races, the variations arising either in vegetative cells or in sexual cells. In 

 latter case parents of variants are hybrids, giving segregation ratios of a Mendelian type 

 although these may be irregular. Some spontaneous variations such as red-purple flowers and 

 maple seed-coats are dominants, while others such as albinism and other foliage-chlorophyll 

 defects are recessive. Albino foliage variations appear first in a ratio of 3 green: 1 white, 

 but the variation must have arisen in the sex cells two generations back, but since green fol- 

 iage is dominant, did not appear except as members of an F 2 generation. Albinism and other 

 chlorophyll defects appeared only in F 2 and later generations of cross of the "pure line" 

 with a white-flowered green-foliage variety. Literature of chlorophyll defects is reviewed. 

 "Disassociation" and "association" concept of Tschermak is discussed; also" pluripotency" 

 concept of Haecker. Variations occurring in sex cells uniting with the unvarying sex cells 

 appear as hybrids. Variations taking place in vegetative cells later give rise to sex-cells 

 which unite and produce pure races of hereditary variations at once. Eversporting proclivity 

 may express itself rarely in some races and as regards some characters. — Orland E. White. 



1509. Gaines, E. F. The inheritance of resistance to bunt or stinking smut of wheat. 

 Jour. Amer. Soc. Agron. 12 : 124-132. 1920. — Bunt resistance to wheat is not a simple Men- 

 delian unit character, but resistance, if Mendelian, is composed of multiple factors, for a 

 continuous series ranging from complete immunity to complete susceptibility has been ob- 

 tained. Different wheat varieties possess different kinds of resistance. Linkage between 

 resistance and morphological characteristics is not sufficient to prevent the selection of a 

 resistant strain of any morphological type desired. — F. M. Schertz. 



1510. Galloway, Beverly T. Some promising new pear stocks. Jour. Heredity 11: 

 25-32. 8 fig. Jan., 1920. 



1511. G auger, Martix. Die Mendelschen Zahlenreihen bei Monohybriden im Llchte 

 der Dispersionstheorie. [The Mendelian ratios in monohybrids in the light of the dispersion 

 theory.] Zeitschr. indukt. Abstamm. Vererb. 22: 145-198. Mar., 1920. 



1512. Goldschmidt, Richard. Intersexualitat und Geschlechtsbestimmung. [Inter- 

 sexuality and sex determination.] Biol. Zentralbl. 39: 498-512. Nov., 1919. 



1513. Gowen, J. W. Appliances and methods for pedigree poultry breeding at the Maine 

 Station. Maine Agric. Exp. Sta. Bull. 280: 65-88. IS fig. 1919.— This is a revision of an 



earlier bulletin on the same subject. — H. D. Goodale. 



BOTANICAL ABSTHAITS, VOL. V, NO. 2 



