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ARS Home » Plains Area » Fargo, North Dakota » Edward T. Schafer Agricultural Research Center » Sunflower and Plant Biology Research » Research » Publications at this Location » Publication #101113
Title: REGISTRATION OF SEVEN OROBANCHE RESISTANT SUNFLOWER GERMPLASM LINES.

Author
item Miller, Jerry
item DOMINGUEZ, J. - C.I.F.A.

Submitted to: Crop Science
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/1/2000
Publication Date: N/A
Citation: N/A

Interpretive Summary: Seven sunflower germplasm lines with resistance to Orobanche cernua were developed cooperatively by USDA-ARS, Fargo, ND, the Agricultural Research Center C.I.F.A., Cordoba, Spain, and the North Dakota Agricultural Experiment Station, Fargo, ND. Orobanche, also known as broomrape, is a parasitic angiosperm infecting the roots of sunflower and causes severe crop losses in Spain and other countries of southern Europe, as well as in many of the countries of the former USSR, the Middle East, and China. These lines exhibited excellent yield and oil content potential in the United States and Spain. R-185, R-188, R-190, R-201, R-202, R-206, and R-207 appear to be homozygous for resistance to race E, the most common race of Orobanche in Spain, and are segregating for resistance to race F. Race F is a new race recently identified in small areas of Spain. The seven lines have upper stem branching conditioned by a recessive gene and are homozygous for fertility restoration of the PET1 cytoplasmic male sterility. R-188, R-190, and R-207 are very well adapted to the north central United States environment, producing very high yields and oil content in hybrids. The shortest hybrids were produced by the R-188 restorer.

Technical Abstract: Seven sunflower (Helianthus annuus) germplasm lines with resistance to Orobanche cernua (syn: Orobanche cumana) were developed cooperatively by USDA-ARS, Fargo, ND, the Agricultural Research Center C.I.F.A., Cordoba, Spain, and the North Dakota Agricultural Experiment Station, Fargo, ND. Orobanche, also known as broomrape, is a parasitic angiosperm infecting the roots of sunflower and causes severe crop losses in Spain and other countries of southern Europe, as well as in many of the countries of the former USSR, the Middle East, and China. These lines exhibited excellent yield and oil content potential in the United States and Spain. R-185, R-188, R-190, R-201, R-202, R-206, and R-207 appear to be homozygous for resistance to race E, the most common race of Orobanche in Spain, and are segregating for resistance to race F. Race F is a new race recently identified in small areas of Spain. The seven lines have upper stem branching conditioned by a recessive gene and are homozygous for fertility restoration of the PET1 cytoplasmic male sterility. R-188, R-190, and R-207 are very well adapted to the north central United States environment, producing very high yields and oil content in hybrids. The shortest hybrids were produced by the R-188 restorer.