Hordeum vulgare

Genetic variability in agronomic traits of a germplasm collection of hulless barley

X. Q. Zeng, Genetic variability in agronomic traits of a germplasm collection of hulless barley, vol. 14, pp. 18356-18369, 2015.

Germplasm collections represent an important genetic source for crop improvements. In this study, 220 accessions of hulless barley were collected worldwide and their genetic diversity was investigated. Sixteen agronomic traits, including yield and yield components, grain morphology, leaf size, plant height, and lodging resistance, were assessed under field conditions. All studied traits exhibited large variation. Thousand seed weight determined yield, and was strongly affected by spike length and spike number.

Molecular detection of QTL controlling plant height components in a doubled haploid barley population

X. F. Ren, Sun, D. F., Dong, W. B., Sun, G. L., and Li, C. D., Molecular detection of QTL controlling plant height components in a doubled haploid barley population, vol. 13, pp. 3089-3099, 2014.

Yield losses caused by lodging in barley can be partially controlled by reducing plant height. In order to understand dwarfing mechanisms and efficiently use new dwarf germplasms for a breeding program, it is important to identify QTL of plant height components. QTL analysis was performed for seven plant height component traits using a DH population of 122 lines derived from the cross of Huaai 11 x Huadamai 6. Composite interval mapping procedures detected 20 QTL, which were mapped onto chromosomes 2H, 3H, 5H, 6H, and 7H.

Genetic diversity analysis of barley landraces and cultivars in the Shanghai region of China

Z. - W. Chen, Lu, R. - J., Zou, L., Du, Z. - Z., Gao, R. - H., He, T., and Huang, J. - H., Genetic diversity analysis of barley landraces and cultivars in the Shanghai region of China, vol. 11, pp. 644-650, 2012.

We analyzed the genetic diversity of 115 barley germplasms, including 112 landraces and three new barley cultivars grown in the Shanghai region, using a set of 11 SSR markers. Sixty-six alleles were observed at the 11 SSR loci, ranged from three to ten, with a mean of six alleles per locus. The polymorphism information content ranged from 0.568 to 0.853, with a mean of 0.732, indicating considerable genetic variation in barley in the Shanghai area. Clustering analysis indicated that these barley accessions could be divided into two categories (A and B).

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