Premium
Registration of Eight Closely Related Wheat Germplasm Lines Differing in Biotype E Greenbug Resistance
Author(s) -
Lazar M. D.,
Worrall W. D.,
Porter K. B.,
Tuleen N. A.
Publication year - 1996
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1996.0011183x003600050073x
Subject(s) - germplasm , crop , horticulture , biology , agronomy
TXGBE272, TXGBE273, TXGBE278, TXGBE280, TXGBE281, TXGBE285, TXGBE292 and TXGBE307 (Reg. no. GP-488 to GP-495, P1 591794 to P1591801) are hard red winter wheat (Triticum aestivum L.) lines developed by the Texas Agricultural Experiment Station. They resulted from a backcross breeding program conducted by K.B. Porter at Bushland, TX. Owing to the close genetic relationship among the lines, and their variation for resistance to Biotype E greenbug [Schizaphis graminum (Rondani)], these lines should be useful in genetic and biochemical studies regarding the nature of resistance. All the lines have the same pedigree, 'TAM 105'*4/'Amigo'*5 //'Largo'. Amigo is a wheat-rye (Secale cereale L.) translocation line (1 AL: IRS) induced by X-irradiation of wheat x triticale (xTnticosecale Wittmack) FI hybrids (1), possessing resistance to Biotype C greenbug. Largo, an amphiploid (2n = 6x = 42) derived from a cross between Triticum turgidum L. cv. Langdon and Triticum tauschii (Cosson) Schmalh. P1 268219 (2), has resistance to Biotype E greenbug. During the first set of backcrosses, in which Amigo was the nonrecurrent parent, selection was practiced for resistance to powdery mildew (caused by Erysiphe graminis DC. f. sp. tritici Em. Marchal), since mildew resistance is linked to Biotype C greenbug resistance on the IRS translocation (3). Crossing-over has not been observed between IRS and IAS. In the second set of backcrosses, in which Largo was the nonrecurrent parent, Biotype E greenbug was the selective agent. The recurrent parent, TAM 105*4/Amigo, in the second set of backcrosses is a full sib of the cultivar TAM 107 (4).