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Genetic and Cytogenetic Analyses of Russian Wheat Aphid Resistance in Triticale × Wheat Hybrids and Progenies
Author(s) -
Nkongolo Kabwe K.,
Lapitan Nora L. V.,
Quick James S.
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/cropsci1996.0011183x003600050007x
Subject(s) - triticale , russian wheat aphid , biology , hybrid , locus (genetics) , secale , genetics , agronomy , gene , botany , pest analysis , aphididae , homoptera
The Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), is a serious pest in wheat ( Triticum aestivum L.). Four Russian triticale (X Triticosecale Wittmack) lines, PI 386148, PI 386149, PI 386150, and PI 386156, have been the most resistant triticales to the RWA in several screening tests. Resistance is controlled by a single dominant gene at a common locus in the three triticale lines PI 386148, PI 386149, and PI 386156. However, expression of these resistance genes in a wheat background and the inheritance of resistance in PI 386150 have not been determined. The objectives of this study were (i) assess the transmission and the expression of RWA resistance in triticale × wheat hybrids, (ii) to determine the inheritance of resistance in PI 386150, and (iii) to identify the rye chromosome(s) from Secale montanum Guss. associated with RWA resistance. Advanced generations from crosses between PI 386148 triticale × ‘Lamar’ wheat and P1386150 triticale × Lamar were produced and the progenies screened to determine their reaction to the RWA. All F 1 plants derived from both crosses were resistant indicating that resistance is dominant in both triticale lines. C‐banding and in situ hybridization with the pSc119.1 probe, a rye‐specific DNA probe, showed that chromosome 4R mon was associated with resistance in PI 386150. The results of this study should facilitate the transfer of the resistance gene(s) from these triticale lines into wheat.