File:A study of selections for the variation and inheritance of the size, shape and color of hens' eggs (1920) (14781411701).jpg

Identifier: cu31924101523425 (find matches)
Title: A study of selections for the variation and inheritance of the size, shape and color of hens' eggs
Year: 1920 (1920s)
Authors: Benjamin, Earl W. (Earl Whitney), b. 1889
Subjects: Poultry Eggs Variation (Biology) Heredity
Publisher: Ithaca, N.Y.
Contributing Library: Cornell University Library
Digitizing Sponsor: MSN

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between size of egg incubatedand size of eggs produced by the resultant chick Each row of progeny production shows twelve eggs, which were selected at regular intervals duringthe respective years production. All eggs were photographed each year, but only twelve eggs for eachyear could be represented in this group 246 Eakl W. Benjamin ordinarily lay large eggs, and vice versa; this probably accounts for the lowcorrelation in studies of mixed flocks, while the study of separate matingsshows more definite results. The heavy curve for line 3916F in figure 19represents the record for the bird whose early pullet daily record is shownas 8882F in figure 18. The photographic record, figure 20, shows the relative sizes of eggsproduced by hne 8224F, one of the largest lines, and by line 3916F, oneof the smallest hues. The difficulty of observing the fine differences insize, except by careful measurements, is seen from this figure. Underline 3916F^ shown another record of the production of 8882F.
Text Appearing After Image:
January February March * April Pig. 21. variation of shape of successive eggs laid during early pullet production The squares blocked in black indicate the days on which eggs were laid by the respective pullets In figures 21 and 22 are shown the daily and weekly fluctuations ofshape. A photographic record of two of the first-year inheritance resultsfor the shape character is shown in figure 23. Both of the fines shown infigure 23 are shown also in figure 22. Neither the shape nor the size of Study op Selections for Size, Shape, and Color of Hens Eggs 247 eggs has a large coeflScieiit of variability, and this fact is reflected in thecurves and in the photographic record. Shapeindex TTTTI 9585 :::;;::::;:::;:::::;:;;:;::;;;::;;;;;:;;:;;;;:;;; ;:::; i; 1 75 ::■ i\: :■■ ■: : -J ;;; ;::::^, ::s .;:,; ,:!l m f \\ ir 65 :::: t::; :::: :::::::::: ::: ::::: ::: !:■■ .:.,. a \%t\ :.:: ::::^::::::: :::::::::: ::: ::::: :::: ::::::::: :: ::::: :::: 95 ? . . ■- -. ,,, ■ ■ 8ii75 :

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