Source: Texas A&M Plant Breeding Bulletin, December 2010


AgriLife Research at Texas A&M recently released new germplasm lines and cultivars of several commodities. Three upland cotton germplasm lines and one new conventional cultivar, three corn germplasm lines, one bluebonnet selection, and one new wheat cultivar were approved by the Plant Release Committee at its fall meeting and subsequently approved by the director of Texas AgriLife Research. Victoria red grape also was approved as a corelease with the Arkansas Agricultural Experiment Station.

TAM RNR 9 and TAM RNR 12 upland cotton germplasm lines were developed by Jim Starr, nematologist with the Department of Plant Pathology and Microbiology, collaboratively with
Wayne Smith, cotton breeder in the Department of Soil and Crop Sciences. These germplasm lines exhibit resistance to both Rootknot, Meloidogyne incognita, and Reniform, Rotylenchulus reniformis, nematodes. The resistance to reniform nematode is only moderate resistance and was introgressed from a Gossypium barbadense accession, TX 110, into an upland germplasm line, M-315, that is highly resistant to rootknot nematode.

TAM 04WB-33s was developed by Wayne Smith, Steve Hague and Eric Hequet and produces fibers that are 11 percent longer, 16 percent stronger, and 7 percent finer than the best quality cotton cultivars available for Texas today. This combination of length, strength, and fineness resulted in 100 pecent cotton yarn that was 27 percent stronger that that produced from current cultivars.

Tamcot 73 was approved for release as a conventional upland cotton cultivar to provide an alternative for producers in central and south Texas who might prefer not to plant transgenic cultivars. This new cultivar exhibits excellent yield potential combined with a fiber quality package that is competitive or exceeds that of most other cultivars available today.

Kerry Mayfield, Seth Murray and others released three corn germplasm lines that carry varying levels of resistance to aflatoxin, produced from infection with Aspergillus flavus. In field experiments where plants were inoculated with Aspergillus flavus, hybrids made with Tx736, Tx739, and Tx740 exhibited 30 percent to 73 percent lower levels of aflatoxin.