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Inheritance of reduced plant height in the sunflower line Dw 89
Author(s) -
Velasco L.,
PérezVich B.,
MuñozRuz J.,
FernándezMartínez J. M.,
Friedt W.
Publication year - 2003
Publication title -
plant breeding
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.583
H-Index - 71
eISSN - 1439-0523
pISSN - 0179-9541
DOI - 10.1046/j.1439-0523.2003.00881.x
Subject(s) - biology , sunflower , horticulture , botany , dominance (genetics) , quantitative trait locus , allele , genetics , gene
The objective of the present research was to study the inheritance of reduced plant height in the sunflower line Dw 89. Plants of the cytoplasmic male sterile version of this line, cmsDw 89 (mean plant height of 47.4 cm) were crossed with plants of the restorer line RHA 271 (mean of 120.9 cm). F 1 plants averaged 120.4 cm, which indicated dominance of standard over reduced plant height. F 2 plants followed a segregation pattern of 1 : 15 (reduced : normal height), suggesting that reduced plant height in Dw 89 is controlled by alleles at two loci, designated Dw1 and Dw2. Class assignment in the F 2 was confirmed through the evaluation of the F 3 generation. Backcrosses to Dw 89 segregated with 1 : 3 (reduced : normal height) ratios, which confirmed the digenic inheritance of the trait. The evaluation of plant height distributions in F 3 families suggested possible genetic interaction between the Dw1 and Dw2 loci.