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Published in Crop Sci 7:511-516 (1967)
© 1967 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Components of Height Inheritance of the Semidwarf Straw Character in Wheat Triticum aestivum L.1

Jerrel B. Powell and A. M. Schlehuber2

Internode patterns of both the semidwarf and tall parents, used in a cross to study the inheritance of plant stature, revealed that: I) Average internode lengths were progressively longer from the base of the culm to the spike, and 2) The peduncle contributed approximately one-half the total height of the tall parent and about one-third the total height of the semidwarf parent in field plantings. The analysis of means for the three components, head length, peduncle length, and culm length (less peduncle), showed that head length in the segregating tall progeny added negative genetic components to total plant height. Gene effects tended to cumulate additively for peduncle length and culm length (less peduncle). Partitioning of populations for the two major components of plant height and total plant height pointed to one major nondominant factor accounting for most of the genetic variation differentiating the semidwarf and normal-statured wheat.

Key Words: internode pattern • partitioning of plant height • genetics of height • additive height components

1 Cooperative investigations at Stillwater, Oklahoma, of the Department of Agronomy, Oklahoma Agricultural Experiment Station. Published with permission of the Director of the Oklahoma Agr. Exp. Sta. as Journal Paper 1496.

2 Research Geneticist, Crops Research Division, Agricultural Research Service, USDA, Tifton, Ga. (formerly Graduate Assistant, Dept. of Agronomy, Oklahoma State University), and Crop Specialist, IRI Research Institute, Inc., N.Y., located at Pelotas, Rio Grande do Sul, Brazil (formerly Professor of Agronomy, Oklahoma State University, Stillwater).

Received for publication May 4, 1967.




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