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Genetic Variability for Yield and Plant Height in Crownvetch¹

Fifty randomly selected crownvetch plants (Coronilla varia L. ‘Chemung’) were mated in a nested sib-mating design, and the parents and their progenies were analyzed to obtain information on the nature of genetic variability of forage yield and plant height. Forage yield at each of two harvests per season, total forage yield, and plant height at each harvest time were evaluated in each of two growing seasons.

Significant variability among the parents and crosses indicated that genetic variance was present for each character. Most of the genetic variance was additive for each character studied. Heritability estimates (in decimal fraction) for yield ranged from 0.05 to 0.28 while those for plant height ranged from 0.10 to 0.22. Mass or individual plant selection should be effective in changing plant height, but family or progeny test selection should be practiced for yield in crownvetch.

Key Words: Coronilla varia • Autotetraploids • Heritability

² Graduate trainee in genetics (now forage breeder, FFR Cooperative, Lafayette, Ind.), professor of plant breeding, research agronomist (also adjunct professor of plant breeding), and professor of plant breeding, The Pennsylvania State Univ., respectively.

Received for publication May 26, 1977.