Januahy, 1020] GENETICS 5 



GENETICS 



George H. Siiull, Editor. 



18. Anonymous. Disease resistance in plants. Card. Chron. 65: 192. Apr. 19, 1919. — 

 See Bot. Absts. 3, Entry 586. 



19. Baertiileix, K. Uber bakterielle Variabilitat insbesondere sogenannte Bakterien- 

 mutationen. [On bacterial variation, especially the so-called Bacteria mutations.] Centralbl. 

 Bakt. 81 : 369-475. 1918. 



20. Baldensperger, Ph. J. Punics and parthenogenesis. Amer. Bee Jour. 58: 376- 

 376. Nov., 1918. — Largely refutation of a former writer's assertions regarding merits of Punic 

 bees. Punics and Syrians are unable to rear workers from a virgin. — R. J. Garber. 



21. Broderick, F. W. Hardy apples and plums for the Canadian Northwest. Minnesota 

 Hortic. 46:393-399. 1 pi., 1 fig. Nov., 1918.— Brief review of history of early fruit intro- 

 ductions with special stress on hardiness. Apple introductions from Russia, and crosses 

 between standard varieties with hardy crab stock have given promising results. Russian 

 seedling apples being tried. List and description given of several varieties of plums of 

 Primus nigra and P. americana which are entirely hardy and of fair quality. Hardy varieties 

 can, perhaps, be developed by: first, plant breeding (crossing); second, selection from native 

 stock; third, introduction from outside sources. — E. L. Proebsting. 



22. Brown, N. E. The defertilization of flowers by insects. Gard. Chron. 63 : 4. 1918. — 

 See Bot. Absts. 3, Entry 604. 



23. Bruce, J. L., Pedigree live-stock. Development of breeding in New Zealand. New 

 Zealand Jour. Agric. 17:65-70. Aug., 1918. Points out probable world-wide demand for 

 pedigreed stock soon as transportion is available and shows New Zealand is well situated as 

 distribution centre in Pacific. Emphasizes value of pedigreed stock and consistent use of 

 pedigreed sires. — H. K. Hayes. 



24. Burkholder, W. H. The production of an anthracnose-resistant white marrow bean. 

 Phytopath. 8: 353-359. 1918.— Rev. by H. A. A. Van der Lek in Genetica 1: 156-157. Mar., 

 1919.— [See also Bot. Absts. 1, Entry 293.] 



25. Castle. W. E. Siamese, an albinistic color variation in cats. Amer. Nat. 53 : 265- 

 268. May- June, 1919.— See Bot. Absts. 3, Entry 236. 



26. Chamberlain, C. J. Chromosomes in Carex. (Rev. of: Heilborn, Otto. Zur 

 Embryologie und Zytologie einiger Carex-Arten. [Embryology and cytology of several species 

 of Carex.) Svensk Bot. Tidskr. 12:212-220. 14 fig. 1918. (See Bot. Absts. 1, Entry 1329; 

 3, Entry 38.)] Bot. Gaz. 67:448. May, 1919. 



27. Correns, C. Die Konkurrenz der manlichen und die weiblichen Keimzellen und das 

 Zahlenverhaltnis der beiden Geschlechter. [The concurrence of male and female germ cells 

 and the numerical relations of the two sexes.] Die Naturwiss. 6: 277-280. 1918. 



28. Crandall, C. S. Apple bud selection: Apple seedlings from selected trees. Illinois 

 Agric. Exp. Sta. Bull. 211: 181-264. 43 fig. 1918.— See Bot, Absts. 3, Entry 242. 



29. Cutler, G. H. A dwarf wheat. Jour. Amer. Soc. Agron. 11: 76-78. 1919.— See Bot. 

 Absts. 3, Entry 171. 



30. Dahlgren, K. V. O. Coloration of plants as affected by crossing varieties. Svensk. 

 Bot. Tidskr. 12: 103-110. 3 fig. 1918. 



