000 02840nab a22003137a 4500
001 G97333
003 MX-TxCIM
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040 _aMX-TxCIM
041 0 _aEn
100 1 _aBeharav, A.
245 0 0 _aMixed model for estimating the effects of the Rhtl dwarfing allele, background genes, CCC and their interaction on cuim and leaf|elongation of Triticum aestivum L., spring wheat
260 _c1994
500 _aPeer-review: Yes - Open Access: Yes|http://science.thomsonreuters.com/cgi-bin/jrnlst/jlresults.cgi?PC=MASTER&ISSN=0018-067X
520 _aA model for the effects of a single gene (SG), background genes (BG), an environmental factor (EF) and the effects of their interactions on quantitative traits is developed. It is a mixed model where SG and EF have fixed effects while BG have a random effect. This model is applied to the analysis of the effects of the dwarfing alleles at the RhtJ locus (SG),interfamily variation (representing BG) and the growth regulant CCC (EF) on coleoptile, leaf and culm length of spring wheat. Culm length of F7 families was tested in a field experiment in the absence of lodging. Coleoptile and leaf lengths of F9 seedlings were examined in a growth room at 18°C. Each family was descended from a single F5 plant, heterozygous at the RhtI locus. Within each family the homozygous tall (rhtl) and the homozygous semi-dwarf (Rhtl) genotypes were identified. Thus, comparing nearly isogenic genotypes within random families in advanced generations enabled the estimation of all the main effects and interactions between SG, BG and EF. The restricted maximum likelihood (REML) method was used in the analysis of variance.In all the three organs CCC caused significant shortening which was somewhat greater in the rhtl than in the Rhtl genotype and the CCC X RhtI interaction effect on culm length was significant. Considerable and significant interfamily variation was found for all three characters. A significant CCC x family interaction effect on the length of the first leaf was obtained. This interaction effect was of a specific trend indicating a distinct increase in the response to CCC with greater leaf length. No CCC X Rht] X family or Rhtl X family interaction effects were detected. The use of two graphical/analytical methods proved to be complementary for a complete evaluation of two-way interactions (CCC x families and CCC x Rhtl in the present study).
546 _aEnglish
593 _aCarelia Juarez
595 _aRPC
650 1 0 _aEnvironmental factor
650 1 0 _aInteraction
650 1 0 _aPolygene
650 1 0 _aquantitative trait
650 1 0 _aSingle gene
700 1 _aCahaner, A.,
_ecoaut.
700 1 _aPinthus, M.J.,
_ecoaut.
773 0 _tHeredity
_gv. 72, p. 237-241
942 _cJA
999 _c29612
_d29612