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ARS Home » Southeast Area » Mayaguez, Puerto Rico » Tropical Crops and Germplasm Research » Research » Publications at this Location » Publication #86159
Title: RESTORER REACTION IN A1 (ATX623), A2 (A2TX632), AND A3 (A3SC103) CYTOPLASMSTO SELECTED ACCESSIONS FROM THE SUDAN SORGHUM COLLECTION

Author
item Dahlberg, Jeffery
item Madera, Pablo

Submitted to: International Sorghum and Millets Newsletter
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 8/1/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary: The Sudan Collection is one of the most important collections within the United States Department of Agriculture's (USDA) Sorghum National Collection. It represents one of the most highly characterized collections within the Germplasm Resources Information Network (GRIN) and is comprised of over 3000 accessions. This collection was introduced into the United States in 1993 and grown in a special quarantine growout at the USDA Germplasm Introduction Research Unit (GIRU) located in Kingshill, St. Croix, U.S. Virgin Islands. In the development of new hybrids, information pertaining to the restoration of fertility is critical in developing new male and female lines used in the industry. In A1 cytoplasm 10.9% of the collection that was analyzed was found to be B-lines (maintains sterility), 6.8% were found to be partial restorers, and 82.3% were found to be R-lines (restores fertility). In A2 cytoplasm, 34.1% were found to be B-lines, 38.3% were found to be partial restorers, and 27.6% were found to be R-lin be partial restorers, and 0.2% were found to be R-lines. This research provides valuable information on the ability of selected germplasm from the Sudan to restore in A1, A2, and A3 cytoplasms.

Technical Abstract: The Sudan Sorghum Collection is one of the most important collections within the United States Department of Agriculture's (USDA) Sorghum National Collection. The objective of this research was to evaluate female restoration reaction in A1, A2, and A3 cytoplasms from selected accessions within the Sudan Collection and to provide that information to the sorghum scientific community. From this collection, five hundred and eighty-five accessions were crossed to ATX623, AxTx632, and A3SC103 in the short-day, winter months at the Isabela Research Farm, USDA Agricultural Research Service (ARS), Tropical Agriculture Research Station (TARS) located in Puerto Rico in 1994 and 1995. Accessions that successfully set seed were planted in a replicated (3x), randomized complete block design trial in the winter of 1996. Five panicles per accession were bagged and then seed set counted and recorded for each trial. In A1 cytoplasm 10.9% of the collection that was analyzed was found to be B-lines (maintains sterility) 6.8% were found to be partial restorers, and 82.3% were found to be R-lines (restores fertility). In A2 cytoplasm, 34.1% were found to be B-lines, 38.3% were found to be partial restorers, and 27.6% were found to be R-line be partial restorers, and 0.2% were found to be R-lines. This research provides valuable information on the ability of selected germplasm from the Sudan to restore in A1, A2, and A3 cytoplasms.