Seed yield and its components in smooth bromegrass (Bromus inermis Leyss.) cultivars

Abstract

Smooth bromegrass, Bromus inermis, yield components, path analysis SUMMARY Seed yield performance and effect on seed yield of morphological traits such as seeds/panicle, seed weight, seeds/branch, branches/2nd node, branches/panicle, fertile tillers/plant and panicle length were evaluated in 13 cultivars of smooth bromegrass in a spaced-plant nursery. Wide variation was observed between and within cultivars for seed yield and traits. Highly significant correlation coefficients were found among traits and seed yield. Path analysis showed that specifically seeds/panicle and seed weight had strong direct effect on seed yield. It was concluded that seeds/panicle and seed weight were primary selection criteria for seed yield in smooth bromegrass.

Responses of Seed Yield Components to the Field Practices for Regulating Seed Yield of Smooth Bromegrass (Bromus inermis Leyss.)

“…It is a kind of perennial grass with a high tolerance for drought and cold, and is widely used for pasture cultivation, rangeland improvement, and soil and water conservation in semi-arid regions in China [36,37]. Compared with annual crops, perennial grass has poor performances of reproduction and seed yield [26], which largely depends on soil fertility, environmental factors, and varieties [38]. Previous research on seed production of smooth bromegrass mostly focused on one single factor, for example, row spacing, phosphorus, or nitrogen treatments [16,35,39,40] and no interactive pattern among seed yield components was investigated.…”

Breeding orchardgrass for satisfactory Oregon seed yield combined with high Iowa forage yield and quality

“…They were successful in increasing initial seedling vigor by selection for high seed weight. Acikgoz and Tekeli (1980) found seed weight and seeds per panicle the primary components of seed yield in smooth bromegrass. In contrast, Jessen (1981) found seed weight to be negatively associated with seed yield, seed number per panicle, and fertility index in smooth bromegrass.…”