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[1.] Ib/Fragment 004 23 - Diskussion
Zuletzt bearbeitet: 2016-07-14 21:13:45 WiseWoman
Fragment, Gesichtet, Ib, Mohamed 2009, SMWFragment, Schutzlevel sysop, Verschleierung

Typus
Verschleierung
Bearbeiter
SleepyHollow02
Gesichtet
Yes.png
Untersuchte Arbeit:
Seite: 4, Zeilen: 23 ff.
Quelle: Mohamed 2009
Seite(n): 2, 3, Zeilen: 2: 26 ff.; 3: 1 ff.
It is particularly common in the Near East Fertile Crescent (Zohary 1969). Generally, wild barley is not tolerant to extreme low temperatures.

Wild barley has a quite similar morphology to cultivated 2-rowed barley. The most marked differences are wild barley’s brittle rachis and its hulled grain. Six-rowed barley has evolved during domestication, the trait being controlled by a single gene on chromosome 2 (Komatsuda et al. 1999, Tanno et al. 2002). Wild barley is the only wild Hordeum species that can produce fully fertile hybrids (with normal chromosome pairing and segregation in meiosis) when crossed with cultivated barley. Hybrids can also be formed in nature when these two occur at the same location (Asfaw & Von Bothmer 1990). Studies with wild and cultivated barley have reported that there is more variation within the wild than in the [cultivated barley (Saghai Maroof et al. 1995), although in some cases the opposite has been reported for some isozymes and mitochondrial DNA (Nevo, 1992).]


Asfaw Z, von Bothmer R (1990) Hybridization between landrace varieties of Ethiopian barley (Hordeum vulgare subsp. vulgare) and the progenitor of barley (H. vulgare subsp. spontaneum). Hereditas 112: 57-64

Komatsuda T, Li WB, Takaiwa F, Oka S (1999) High resolution map around the vrs1 locus controlling two- and six-rowed spike in barley, Hordeum vulgare. Genome 42: 248-253

Nevo E (1992) Origin, evolution, population genetics and resources for breeding of wild barley, Hordeum spontaneum, in the Fertile Crescent. In: Barley, genetics, biochemtry, molecular biology and biotechology (ed. R. Shewry). C. A. B. International, Wallindford, Oxon, UK CAB International: 19-43

Saghai Maroof MA, Zhang Q, Biyashev R (1995) Comparison of restriction fragment length polymorphisms in wild and cultivated barley. Genome 38: 298-306

Tanno K, Taketa S, Takeda K, Komatsuda T (2002) A DNA marker closely linked to the vrs1 locus (row-type gene) indicates multiple origins of six-rowed cultivated barley (Hordeum vulgare L.). Theor Appl Genet 104: 54-60

Zohary D (1969) The progenitors of wheat and barley in relation to domestication and agricultural dispersal in the old world. In Ucko PJ, Dimbleby GW (eds) The domestication and exploitation of plants and animals. General Duckworth and Co. Ltd., London, pp 47-66. http://faostat.fao.org [sic!]

It is particularly common in the Near East Fertile Crescent (Zohary 1969). In general, wild barley is not tolerant to extreme low temperatures and is rarely found above 1500 m altitude.

[...]

Wild barley and cultivated 2-rowed barley have quite similar morphology. The most notable differences are wild barley’s brittle rachis and its hulled grain. Six-rowed barley

[page 3]

has evolved during domestication, the trait being controlled by a single gene on chromosome 2 (Komatsuda et al. 1999, Tanno et al. 2002). Wild barley subspecies spontaneum is the only wild Hordeum species that can produce fully fertile hybrids (with normal chromosome pairing and segregation in meiosis) when crossed with cultivated barley. Hybrids can also be formed in nature when these two occur at the same location (Asfaw & Von Bothmer 1990).

Studies with wild and cultivated barley have shown that there is more variation within the wild than in the cultivated barley (Saghai Maroof et al. 1995), although in some cases the opposite has been reported for some isozymes and mitochondrial DNA (Nevo, 1992).


Asfaw Z, von Bothmer R (1990) Hybridization between landrace varieties of Ethiopian barley (Hordeum vulgare ssp. vulgare) and the progenitor of barley (H. vulgare ssp. spontaneum). Hereditas 112: 57-64.

Komatsuda T, Li WB, Takaiwa F, Oka S (1999) High resolution map around the vrs1 locus controlling two- and six-rowed spike in barley, Hordeum vulgare. Genome 42: 248-253.

Nevo E (1992) Origin, evolution, population genetics and resources for breeding of wild barley, Hordeum spontaneum, in the Fertile Crescent. In: Barley, genetics, biochemtry, molecular biology and biotechology (ed. R. Shewry). C. A. B. International, Wallindford, Oxon, UK CAB International: 19-43.

Saghai Maroof MA, Zhang Q, Biyashev R (1995) Comparison of restriction fragment length polymorphisms in wild and cultivated barley. Genome 38: 298-306

Tanno K, Taketa S, Takeda K, Komatsuda T (2002) A DNA marker closely linked to the vrs1 locus (row-type gene) indicates multiple origins of six-rowed cultivated barley (Hordeum vulgare L.). Theor Appl Genet 104: 54-60.

Zohary D (1969) The progenitors of wheat and barley in relation to domestication and agricultural dispersal in the old world. In Ucko PJ, Dimbleby GW (eds) The domestication and exploitation of plants and animals. General Duckworth and Co. Ltd., London, pp 47-66.

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