Heritability, variance, and selection studies in an oat population

Abstract

69, 60, 49 and 22 percent for heading date, plant height, 100-seed weight, and yield, respectively. Petr and Prey (1966), using F2 plants in I5 oat crosses, obtained herit ability percentages (broad sense) of 33j 53j 5^, 61, 74, and 87 percent for number of panicles per plant, grain yield, panicle length, plant height, number of spikelets per panicle, and heading date, respectively. Both of these teams of researchers used variance components from spaced-plant data to calculate the herltabllity percentages. Mean heritability percentages (standard unit) for heading date In oat crosses were 62, 63, and 68 percent for the F^-F^, F^-F^, and F^-F^ comparisons, respectively, according to Prey and Horner (1957). Huang (1967) using data from replicated yield trials, found heritability values for oats of 76, 88, 93, and 72 percent for yield, 100-seed weight, heading date, and height, respectively. Using data from replicated oat trials grown in five testing environments, namely, low fertility, late planting, high productivity, low plant density and high plant density. Vela (1968) found heritabilities of 26, 31, 45, 28, and 42 percent, respectively, for grain yield, 71, 58, 60, 55, and 58 percent, respectively, for 100-seed weight, and 44, 55, 73, 64, and 71 percent, respectively, for plant height. Also from replicated trial data on oats, Wallace, Middleton, Comstock and Robinson (1954) found heritabilities of 43, 81, 61, 57, 40, and 83 percent for grain yield, seed weight, seeds per panicle, culms per plant, seeds per plant and height, respectively. Johnson and Frey (1967) found heritability values of 83, 33, 54, 68, 76, and 38 percent for height, plant weight, panicles per plot, splkelets per panicle, seed weight and grain yield, respectively when data were pooled over several environments.

Inheritance, heritability, and correlation studies on harvest index and related traits in oats (Avena sativa L.)

“…(18,28,33,40,41). In the present study, average genotypic correlations between harvest index, grain yield, heading date, and plant height (Table 24) were similar in sign but different in magnitude to those reported by Rosielle and Frey (41).…”