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Hybridization, Cytological, and Inheritance Studies of a Sorghum Cross ‐ Autotetraploid Sudangrass × (Johnsongrass × 4n Sudangrass) 1
Author(s) -
Casady Alfred J.,
Anderson Kling L.
Publication year - 1952
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/agronj1952.00021962004400040007x
Subject(s) - sorghum , agricultural experiment station , inheritance (genetic algorithm) , agriculture , horticulture , mathematics , biology , agronomy , ecology , biochemistry , gene
YBRID progeny, originating from a cross between H Johnsongrass (Sorghum halepense (L.), Pres.) and autotetraploid common Sudangrass (S. vzllgure var. sudanense (Piper), Hitchc.) made by Dr. L. F. Randolph at Cornell University, Ithaca, N. Y., has been grown in the Sudangrass breeding nursery at Kansas State College, Manhattan, Kans., since 1942. Some promising selections suitable for pasturage were isolated, but these selections have a dry, pithy stalk which lowers somewhat their palatability to livestock. In 1948 the better selections were crossed with juicy-stalked autotetraploid Sudangrass in an attempt to combine the juicy-stalk character with the desirable characteristics of the Johnsongrass x 4n Sudangrass selections. The progenies of four crosses were observed geneticall) to learn the mode of inheritance of dry vs. juicy stalk and also purple vs. brown plant color. The parental material and progenies were studied cytologically to learn the behavior of the chromosomes and, thus, evaluate the success of the cross. Data on the frequency of hybridization between the Johnsongrass x 4n Sudangrass selections and both diploid and autotetraploid Sudangrass also are included.