=) STATES DEPARTMENT OF AGRICULTURE 
Contribution from the Bureau of Plant Industry 
WM. A. TAYLOR, Chief 
Washington, D. C. PROFESSIONAL PAPER June 26, 1919 
INHERITANCE OF WAXY ENDOSPERM IN MAIZE. 
By J. H. Kempton, Assistant in Crop Acclimatization. 
CONTENTS. 
Page Page. 
Endosperm texture in maize..........-.-.-- 1 | Summary of the inheritance of aleurone 
Crosses between the Algeria and a Chinese COLOTE Rye s cee ees ahaa acts cents do Ui 61 
TARTIGIAY J cos so se CORE OPO OBHE BBO U DUBE SU BODEE 3 | Correlation between, endosperm texture and 
’ Third generation of the hybrid Dh 234...... 10 aleurone color..............sceeeeeeeeeeeee 65 
Summary of the progeny of Dh 234.......... 17 | Method of measuring correlations............ 67 
Third generation of the hybrid Dh 237...... 17 | Gametic correlations in the two hybrids Dh 
Crosses between the two hybrids Dh 234 and Bavand Dhy-237s4 7. Shee See See 68 
DE WW ae iets aia celui nisin ws wfale’s wis[are i= 21 | Correlation in the second generation of the 
Differences in reciprocals. ........-......-.-- 27 sy for AD Nae ee Ley a ea 69 
Summary of the inheritance of waxy endo- Correlation in the second generation of the 
TEGO 4 se Ab s45pSdedSe esse Beseee ora sOes 29 ImhydVaOh IDVal YAI/E oo concmaaue sa anDoabeocboade 70 
Inheritance of aleurone color.........-.-.---- 30 | Correlation in crosses between the two hy- 
Gametic composition of the two hybrids Dh brids Dh 234 and Dh 237..........-:....--- 73 
74: an) DID PAY. eee oanenoececnpoccoceanese 32 | Correlation in the third generation of the 
Composition in the second generation of the TOA OTAGl IDO ee oe ete eee ouooones 75 
hybrid Dh 234. .-.. 22.20... eeee--00-- eens 34 | Correlation in the third generation of the 
Composition in the second generation of the hybrid Dh 237........ IC peal ae A a 78 
Tiybrid Dit 237. . - .- -ccen--nen--- ncn ----- 36 | Second generation of the crosses between the 
Composition in the third generation of the two hybrids Dh 234 and Dh 237........... 88 
LOUIS) TGs ee ee ee Se 39 | Summary of the correlation between endo- 
Composition in the third generation of the sperm texture and aleurone color.........- 95 
HEY ETIGUO URIS Lasso Sst do css ce ted scien ses AG mM Conelusionseresseeeeaae relies sees series elect 97 
Summary of the hybrid Dh 237..........-..- 50 | Literature cited.........-----<2-.-..-....00. 99 
Progeny of the crosses between the two hy- 
brids Dh 224 and’ Dh 237..-.-..--.-<.+%--<- 50 
ENDOSPERM TEXTURE IN MAIZE. 
In 1908 Mr. G. N. Collins found in a variety of maize imported 
from China a new type of endosperm which was entirely unlike the 
endosperms of any other varieties previously known, being neither 
horny, starchy, nor sweet. This new texture of the endosperm was 
designated cereous or waxy, which well describes its appearance, the 
cut surface of the seed resembling a hard wax : (3 ye 
1 Serial numbers in parethioscs refer to.“ L tet ‘ature cited,’ page 99, 
89356°—19 1 
