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GrainGenes Reference Report: AUM-59-63

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Reference	AUM-59-63
Title	Variability and interrelationship between some quantitative traits of triticale 8x hybrids with wheat 6x and parental forms
Journal	Annales Universitatis Mariae Curie-Skodowska.Sectio E, Agricultura
Year	2004
Volume	59
Pages	63-73
Author	Gruszecka D
Abstract	Biometric measurements of yield-forming traits were performed using plants of 4 secondary hexaploid triticale cross combination (triticale 8 times x wheat 6 times), in generations from BC SUB 1 F SUB 1 to BC SUB 1 F SUB 6 (without BC SUB 1 F SUB 4 , which was most often absent due to unfavourable weather conditions) and parental forms: 4 strains of primary octoploid triticale and 4 cultivars of hexaploid wheat (Jana, Aurora, Liwilla and Lanca). The secondary hexaploid triticale was obtained due to a single back crossbreeding of primary octoploid triticale forms (2 n =56) ([female]) in C SUB 3 or C SUB 4 , with respective parental wheat varieties (2 n =42) ([male]). Then, hybrid plants were reproduced through self-pollination. Estimation of yield-forming traits was performed at the same time for respective parental forms and hybrids being the progeny of euploids in generations. The characteristics and the range of variability and interrelationship between particular traits determining triticale yield revealed that main shoot length, spike density and fertility usually increased in plants of the hybrid generations studied. Significant phenotypic correlation coefficients pointed to a favourable influence of octoploid triticale on the shaping of the main shoot length, spike density, fertility and 1000-kernel weight for hybrids in BC SUB 1 F SUB 2 or more rarely in BC SUB 1 F SUB 3 as well as rachilla length in BC SUB 1 F SUB 5 . Paternal form, hexaploid wheat, positively affected the rachilla length and 1000-kernel weight in BC SUB 1 F SUB 2 , but negatively the 1000-kernel weight in BC SUB 1 F SUB 3 , and the spike density in BC SUB 1 F SUB 5 . Octoploid triticale of great spike density and high 1000-kernel weight had a favourable effect on those traits in hybrid plants in BC SUB 1 F SUB 2 ; however, their high 1000-kernel weight negatively correlated with that value in BC SUB 1 F SUB 6 . In general, the most evident influence of parental components on hybrid forms occurred at early generations, notably in BC SUB 1 F SUB 2 , which could be used during selection in a breeding cycle
Keyword	[ Hide all but 1 of 20 ] backcrossing characteristics crop yield cross cultivar euploidy fertility genetic variation hexaploidy hybrid hybridization kernels phenotypic correlation progeny quantitative trait selection self pollination spikes triticale weather

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