UNITED 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 color’... 2.233 Sees DE wR SY a He 61 
TG ASE SB Se Se er oes ee oe Ee 3 | Correlation between endosperm texture and 
Third generation of the hybrid Dh 234...... 10 aleurone Colones seen aces ee eee 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 QZARATAC MD NAS Gps cee ee Nonbs O eae ae eat he 68 
2373-6). eo. sodabbodacocoupeedsonooe. 21 | Correlation in the second generation of the 
Differences in reciprocals. ..:..:-..-2..s.02-: 27 Lays oy a el Day AR YS ee I eal a IE RSIS 69 
Summary of the inheritance of waxy endo- Correlation in the second generation of the 
JANUS Joe chodes Sudpenctioshsudgosbogpaoeedn 29 hybrid ADE Qs. ese EEE A ER ye 70 
Inheritance of aleurone color................. 30 | Correlation in crosses between the two hy- 
Gametic composition of the two hybrids Dh brids Dhi234 and Dh 2375 25 tees eee 73 
SAAT GODIN 237 Shier adel sce - Soc heh eee eS 32 | Correlation in the third generation of the 
Composition in the second generation of the iy bridh hy 2349 7b 2 ec alas Nas Wins as 75 
MUI GD 234 < oS. fo nicisla sw wwices «30 tee te 34 | Correlation in the third generation of the 
Composition in the second generation of the hy bridhD hy 237k). a, | Ee ee 78 
PPM EN 2G, os Be ojos asia aio pci sicyaeisicio aie cic 36 | Second generation of the crosses between the 
Composition in the third generation of the two hybrids Dh 234 and Dh 237........... 88 
Te Wh 2347-67 7). ded. Cae. 39 | Summary of the correlation between endo- 
Composition in the third generation of the sperm texture and aleurone color.......... 95 
|v arc 1D gad oie a Pe i ae AS iil) OCHO es Aaa sc oodrodigcdddscca sod 97 
Summary of the hybrid Dh 237............. 50 |) Literature cited; 2 .stiepe- $2 -)[- tien. 99 
Progeny of the crosses between the two hy- 
DRASHO he2347an duh 23 iieesnee cece eels < - 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).1 
1 Serial numbers in parentheses refer to ‘“ Literature cited,” page 99. 
89356°—19—_—_1 
