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Inheritance and identification of molecular markers associated with a novel dwarfing gene in barley.

Ren X, Sun D, Guan W, Sun G, Li C - BMC Genet. (2010)

Bottom Line: All the F1 plants displayed tall trait.Allelism test indicated that this dwarfing gene in the Huaai 11 is nonallelic with the gene br, uzu, sdw1 and denso.Using a double haploid population derived from a cross of Huadamai 6 and Huaai 11 and SSR markers the novel dwarfing gene was mapped onto the long arm of chromosome 7H, and closely linked to Bmac031 and Bmac167 with genetic distance of 2.2 cM.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.

ABSTRACT

Background: Dwarfing genes have widely been used in barley breeding program. More than 30 types of dwarfs or semidwarfs have been reported, but a few has been exploited in barley breeding because pleiotropic effects of dwarfing genes cause some undesired traits. The plant architecture of newly discovered dwarfing germplasm "Huaai 11" consisted of desirable agronomic traits such as shortened stature and early maturity. Genetic factor controlling the plant height in dwarf line Huaai 11 was investigated.

Results: The Huaai 11 was crossed with tall varieties Monker, Mpyt, Zhenongda 3, Zaoshu 3, Advance, Huadamai 1, Huadamai 6, Hyproly and Ris01508. All the F1 plants displayed tall trait. Both tall and dwarf plants appeared in all the F2 populations with a 3:1 segregation ratio, suggesting that dwarfism of Huaai 11 is controlled by a single recessive gene, btwd1. Allelism test indicated that this dwarfing gene in the Huaai 11 is nonallelic with the gene br, uzu, sdw1 and denso. Using a double haploid population derived from a cross of Huadamai 6 and Huaai 11 and SSR markers the novel dwarfing gene was mapped onto the long arm of chromosome 7H, and closely linked to Bmac031 and Bmac167 with genetic distance of 2.2 cM.

Conclusion: Huaai 11 is a new source of dwarf for broadening the genetic base of dwarfism. This dwarf source was controlled by a recessive dwarfing gene btwd1, was mapped onto the long arm of chromosome 7H.

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Photo of the dwarf Huaai 11 and cultivar Huadamai 6 plants.
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Figure 1: Photo of the dwarf Huaai 11 and cultivar Huadamai 6 plants.

Mentions: Huaai 11 was discovered from the barley landrace Daofu Bai Qing Ke in 1993. Plant height of Huaai 11 is about 40 cm which is significant shorter than Huadamai 6 (85 cm) (Figure 1). Huaai 11 was crossed with nine tall varieties, Monker, Mpyt, Zhenongda 3, Zaoshu 3, Advance, Huadamai 1, Huadamai 6, Hyproly and Ris01508. All the F1 plants were tall. Distribution of plant height in all F2 populations are discontinuous, the distribution curves are dropped to valley at 60 cm, the plant equal or higher than 60 cm was classified as tall, while less than 60 cm as dwarf. Both the tall and dwarf plants appeared in all the F2 populations with a 3:1 segregation ratio for tall : dwarf (plant height ≥ 60 cm : plant height < 60 cm), suggesting that the dwarf trait in the Huaai 11 is controlled by single recessive gene. This gene is designated as btwd1.


Inheritance and identification of molecular markers associated with a novel dwarfing gene in barley.

Ren X, Sun D, Guan W, Sun G, Li C - BMC Genet. (2010)

Photo of the dwarf Huaai 11 and cultivar Huadamai 6 plants.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC2959052&req=5

Figure 1: Photo of the dwarf Huaai 11 and cultivar Huadamai 6 plants.
Mentions: Huaai 11 was discovered from the barley landrace Daofu Bai Qing Ke in 1993. Plant height of Huaai 11 is about 40 cm which is significant shorter than Huadamai 6 (85 cm) (Figure 1). Huaai 11 was crossed with nine tall varieties, Monker, Mpyt, Zhenongda 3, Zaoshu 3, Advance, Huadamai 1, Huadamai 6, Hyproly and Ris01508. All the F1 plants were tall. Distribution of plant height in all F2 populations are discontinuous, the distribution curves are dropped to valley at 60 cm, the plant equal or higher than 60 cm was classified as tall, while less than 60 cm as dwarf. Both the tall and dwarf plants appeared in all the F2 populations with a 3:1 segregation ratio for tall : dwarf (plant height ≥ 60 cm : plant height < 60 cm), suggesting that the dwarf trait in the Huaai 11 is controlled by single recessive gene. This gene is designated as btwd1.

Bottom Line: All the F1 plants displayed tall trait.Allelism test indicated that this dwarfing gene in the Huaai 11 is nonallelic with the gene br, uzu, sdw1 and denso.Using a double haploid population derived from a cross of Huadamai 6 and Huaai 11 and SSR markers the novel dwarfing gene was mapped onto the long arm of chromosome 7H, and closely linked to Bmac031 and Bmac167 with genetic distance of 2.2 cM.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.

ABSTRACT

Background: Dwarfing genes have widely been used in barley breeding program. More than 30 types of dwarfs or semidwarfs have been reported, but a few has been exploited in barley breeding because pleiotropic effects of dwarfing genes cause some undesired traits. The plant architecture of newly discovered dwarfing germplasm "Huaai 11" consisted of desirable agronomic traits such as shortened stature and early maturity. Genetic factor controlling the plant height in dwarf line Huaai 11 was investigated.

Results: The Huaai 11 was crossed with tall varieties Monker, Mpyt, Zhenongda 3, Zaoshu 3, Advance, Huadamai 1, Huadamai 6, Hyproly and Ris01508. All the F1 plants displayed tall trait. Both tall and dwarf plants appeared in all the F2 populations with a 3:1 segregation ratio, suggesting that dwarfism of Huaai 11 is controlled by a single recessive gene, btwd1. Allelism test indicated that this dwarfing gene in the Huaai 11 is nonallelic with the gene br, uzu, sdw1 and denso. Using a double haploid population derived from a cross of Huadamai 6 and Huaai 11 and SSR markers the novel dwarfing gene was mapped onto the long arm of chromosome 7H, and closely linked to Bmac031 and Bmac167 with genetic distance of 2.2 cM.

Conclusion: Huaai 11 is a new source of dwarf for broadening the genetic base of dwarfism. This dwarf source was controlled by a recessive dwarfing gene btwd1, was mapped onto the long arm of chromosome 7H.

Show MeSH
Related in: MedlinePlus