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Factors for Color of Aleurone and Endosperm in Maize 1
Author(s) -
Hayes H. K.,
Brewbaker H.E.
Publication year - 1926
Publication title -
agronomy journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.752
H-Index - 131
eISSN - 1435-0645
pISSN - 0002-1962
DOI - 10.2134/agronj1926.00021962001800090003x
Subject(s) - aleurone , endosperm , agricultural experiment station , mathematics , library science , computer science , horticulture , biology , botany , agriculture , ecology
As a result of intensive studies of inheritance which have been. conducted for the most part since ~9~o, a good start has been made in the determination of chromosome group relationships in maize. Factors for aleurone color have been found in three different linkage groups. Much of the credit for the extensive cooperative studies of linkage investigations with maize is due to Dr. R. A. Emerson of Cornell University who, with his students, has made a large part the discoveries of factor locations. It is generally recognized by students of maize inheritance that aleurone color is due to the interaction of five pairs of factors which have been called Aa, Co, Rr, Prpr, and If. The determination of the C, R, Pr, and I factors was made by East and Hayes (7)3 and East (6), although Emerson (8, 9, ~o) presented important data which helped to substantiate the .hypothesis. In a later paper, Emerson (i ~) presented facts which proved that there was another factor pair involved which ~vas called Aa. A, C, and R are all necessary for the production of red aleurone color, and Pr, in the presence of A, C, and R, gives purple aleurone. When I is present this factor inhibits aleurone ccl6r. C and I are located in chromosome group I and kre either very close together or are allelom0rphic (Hutchison, ~3). The factor R is at the left of the center of chromosome group II and A in the extreme left of chromosome group VII (Lindstrom, ~5)Emerson ,has 15roduced appropriate aleurone testers which can be used to determine the aleurone color factors carried by any particular variety of corn. For example, the aletirone tester for A is genotypically aa, CC, RR. By crossi_ng any variety of corn with the A tester, it is possible to find ~vhether this variety carries the factor A or nog. Similarly, aleurone testers known as C tester, R tester, and Pr tester are available. Another fact regarding aleurone color is of interest and was brought out very clearly by Emerson in his paper in I9~8 (i~). Mottled