No. 4, January, 1921 1 GENETICS 231 



speltoid only formed the epidermis of one side of the spikes. Consequently all the seeds gave 

 typical plants only. In a third chin-aera-spike the speltoid component seems to have given 

 rise only to part of the epidermis in the lower part of the spike, while in the development of 

 the upper part the typical epidermis has been entirely replaced by the speltoid. A fourth 

 spike had the outer glumes on the four lowest spikelets on each side of the rachis quite typical 

 and distended on the one side of the spikelets, while on the other side they were speltoid. 

 In the upper part of the spike all the outer glumes were of the speltoid type. From the seeds 

 situated nearest the typical outer glumes in the S lowest spikelets 5 typical plants were 

 obtained in all. The others gave speltoids and the normal type. The progeny of the normals 

 were all normals. The plants originating from the speltoids showed segregation into spel- 

 toid heterozygotes identical with the parent plants, and plants of the normal type n the 

 ratio 1: 1 (Cf. Nilsson-Ehle, Bot. Not. 1917). The plant in question may be a real chimaera 

 largely made up of a speltoid heterozygote together with two sectors of the normal type of 

 at least two cell layers in thickness. — K. V. Ossian Dahlgren. 



1566. Amend, F. Untersuchungen uber flamischen Roggen unter besonderer Beriick- 

 sichtung des veredelten flamischen Landsroggen und seiner Ziichtung. [Investigations on Flem- 

 ish rye with special reference to improved varieties and their breeding.] Landw. Jahrbuch. 

 52:-614-669. 1919. — Original Flemish "land-rye" (Landroggen) subjected to breeding since 

 1903 in maritime climate of western Flanders. From 1903 to 1909 mass selection of heads was 

 practised, but beginning in 1909 plant selection. Work interrupted by war. The fine quali- 

 ties of the "land-rye" resulted. Certain correlations are pointed out. Uniform head of 

 medium thickness and green grains are given by author as desirable qualities to breed for. 

 [From anonymous review in Zeitschr. Pflanzenziicht. 7: 112. Dec. 1919.] — /. P. Kelly. 



1567. Anonymous. Ten week stock and doubling. Florists Exch. 50: 159. July 24, 

 1920. — There is little foundation for the assumption that Germans have a secret enabling 

 them to produce strains of stocks yielding 80 per cent or over of doubles. Because of scarcity 

 of seed due to the war, English and French growers started raising their own seed. French 

 had already proved they could produce strains yielding a high percentage of doubles. Ex- 

 periments carried on by staff of Royal Horticultural Society showed that higher percentage 

 of doubles was produced by more vigorous plants, but this met disapproval. In Scotland 

 the strain Midlothian yielded more doubles with age. However, it was found that a strain 

 bred for doubleness will through its singles continue to produce doubles in the same propor- 

 tion. French pot-saved seed and English open-ground seed were planted in the open, the 

 French strain producing a much higher percentage and superior quality of doubles. Single- 

 flowered plants of the white-flowered double-growing French strain varied but slightly as to 

 flower characters, but markedly in seed-pod characters. Some plants had long, thin, easy- 

 thrashing pods, others short, thick, hard-thrashing pods. Thin pods are believed to give rise 

 to mostly singles; thick ones to mostly doubles. Five hundred progeny from an extra long, 

 thin-podded plant gave only 2 doubles, while progeny from short-podded plants gave as high 

 proportion of doubles as best pot-saved seeds. — Francena R. Meyer. 



1568. Anonymous. Biometric and eugenic laboratories at University College, London. 

 Science 52: 30-31. July 9, 1920. — At this institution there has been added to the Drapers' 

 Company Biometric Laboratory and the Galton Laboratory for National Eugenics, a third 

 building provided by Sir Herbert Bartlett. This last is superbly equipped with museums, 

 lecture theater, laboratory rooms, and apparatus. — Merle C. Coulter. 



1569. Anonymous. [Rev. of Anthony, Stephen, and Harry V. Harlan. Germination 

 of barley pollen. Jour. Agric. Res. 18: 525-536. 2 pi., 2 fig. Feb. 16, 1920.— [See Bot. Absts. 

 5, Entries 949 and 1449.] Gard. Chron. 68: 103. Aug. 28, 1920. 



1570. Anonymous. [German rev. of Backhouse, W. O. The inheritance of glume length 

 in Triticum polonicum. A case of zygotic inhibition. Jour. Genetics 7: 125-133. Feb., 

 1918. (See Bot. Absts. 1, Entry 211; 3, Entry 2157.)] Zeitschr. Pflanzenziicht. 7: 206. June, 

 1920. 



