1019 J FIELD (HOPS. 437 



of maturity on the development of aleurone color 1h Indicated, nnd the differ- 

 ence In appearance of aleurone colors due to the color, composition, and texture 

 of the underlying endosperm are discussed. 



Certain previously unannounced genetic factors Influencing aleurone color 

 and color patterns are described, although the mode of Inheritance of tome 

 of these, and their interrelations with other aleurone factors, liave not as yet 

 been fully determined. 



Heterozygous mottling of aleurone color Is said to be due to the Rr factor 

 pair or to some factor closely associated with it. Furthermore it was shown 

 by means of reciprocal crosses that mottling occurred only when R was con- 

 tributed by the male parent and r by the female parent of a cross, Indicating 

 that colored aleurone of the constitution RRR or RRr is self-colored, while 

 that of the constitution rrR is ordinarily mottled. Various hypotheses bear- 

 ing upon the relation of R to mottling are discussed. 



Examples are presented of anomalous development of aleurone color result- 

 ing In seeds that were partly colored and partly colorless, it being demon- 

 strated that R was rarely if ever concerned in this peculiar coloration, while 

 C and A, the latter probably more frequently than the former, were so con- 

 cerned. Such colored-colorless seeds apparently occurred only when at least 

 one of the aleurone color factors was heterozygous, and then only when the 

 dominant factor entered the cross from the male parent and its recessive 

 allelomorph from the female parent From these facts it is inferred that the 

 aaA condition of the aleurone, for instance, but not the AAa and AAA condi- 

 tions, may occasionally result in anomalously colored seeds. Three possi- 

 bilities are discussed in this connection, vegetative segregation, somatic muta- 

 tion, and aberrant chromosome behavior. 



Cotton variety tests, 1918, L. E. Rast (Oa. State Col. Agr. Giro. 81 (1919), 

 pp. 4).— Of the 38 varieties of cotton tested, College No. 1 was first in yield of 

 lint with 972 lbs. per acre, and Wanamaker next in order with 877 lbs. Based 

 upon the yield and value of both seed and lint, Meade, a long-staple upland 

 variety, is estimated to have given the largest total money return, $371.80 per 

 acre. College No. 1 was second with $341.61. 



Varieties of cotton, 1909-1917, W. E. Atbes (Arkansas Sta. Bui. 157 

 (1918), pp. 1,0, figs. 2).— This bulletin presents general conclusions and recom- 

 mendations with regard to cotton varieties in Arkansas, together with con- 

 siderable tabulated data on yields of different strains grown in numerous tests 

 throughout the State and previously noted (E. S. R., 39, p. 637). 



It is estimated that good varieties of cotton will produce for the State 

 products worth $75,000,000 more annually than poor varieties and $25,000,000 

 more than average sorts, and that good varieties alone will increase the value 

 of the cotton crops of the South by $230,000,000 annually. The use of well- 

 bred seed from consistently high yielding varieties is recommended, and com- 

 munity action for the protection of seed cotton from deterioration through 

 mixing at the gin is urged. It is stated that a few varieties could profitably 

 replace the large number now grown in the State. 



Trice, Cleveland, and early strains of Triumph are said to be the most 

 satisfactory short staple varieties for the hill and thin valley lands of north- 

 eastern Arkansas, while Express and early strains of Webher are deemed to 

 he the best long staple kinds. Express and early strains of Foster and Webber 

 are recommended for the better soils in the bottom lands of this section which 

 are adapted to long staple cotton. Trice and dwarf strains of Cleveland and 

 Triumph are regarded as desirable short staple varieties for these soils. 



Express, Foster, and Webber, together with early strains of the last two 

 under severe weevil infestation, were found to be the best long staple varieties 



