Crop Science Journal of Natural Resources and Life Sciences Education
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Published in Crop Sci 23:64-68 (1983)
© 1983 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Stand Establishment Characteristics of Barley Genotypes of Different Plant Heights1

B. Bacaltchuk and S. E. Ullrich2

There is a trend to develop short-statured barley (Hordeum vulgare L.) cultivars, primarily to reduce lodging. Considering the short coleoptile length and consequent stand establishment problems associated with the development semi-dwarf wheat (Triticum aestivum L.) this study was conducted to investigate the situation in barley. Seedling and stand establishment characteristics of 18 spring barley genotypes of various plant heights were studied in the laboratory, greenhouse, and field. The temperature for maximum coleoptile elongation was 20 C, although individual cultivar variation occurred in response to temperature. Significant differences among genotypes were observed for coleoptile length. In the greenhouse, emergence [emergence rate index (ERI) and percent final stand] was highest at the 3 cm planting depth and decreased with deeper planting. The cultivar with the shortest coleoptile length had the highest ERI (emerged the quickest) at 8 and 13 cm planting depths. In the field ERI's varied with spring and summer plantings. Final stands were affected less. Variation in response for the cultivars varied over the range of the three environments studied. Some of the shortest-stemmed cultivars had the longest coleoptiles and established the best stands. Among the traits studied, few significant correlated responses were observed especially involving coleoptile length. There was a negative correlation between coleoptile length and final stand for one of the plantings (r = –0.64). Yield was negatively correlated with plant height for one of the plantings (r = –0.64) in the absence of lodging. The strong relationships among plant height, coleoptile length, and stand establishment typically found for wheat did not occur in the barley genotypes used in this study.

Key Words: Hordeum vulgare L. • Coleoptile length • Emergence rate index • Germination rate index • Planting depth • Seedling vigor • Semi-dwarf

1 Contribution of the College of Agric. Res. Ctr., Washington State Univ. Scientific Paper No. 6064. Project No. 1006, 3006 and 0233.

2 Agronomist, Centre Nacional de Perquisa de Trigo-EMBRAPA Passo Fundo, RS, Brazil (formerly graduate student, Dep. of Agronomy and Soils, Washington State Univ.) and assistant professor of agronomy and assistant agronomist, Dep. of Agronomy and Soils, Washington State Univ., Pullman, WA 99164.

Received for publication November 9, 1981.




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