ISSN:
1432-2242
Keywords:
Peas
;
Genetics
;
Foliage
;
Heterozygosity
;
Heterosis
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
Notes:
Summary Eight near-isogenic lines of pea representing all the homozygous combinations of three genes af, st and tl, which modify leaf shape and size, were crossed in all possible ways excepting reciprocals. An analysis of the resulting 36 families has shown that homozygous mutant alleles at the tl locus acting with homozygous mutant alleles at the af and st loci increase both seed weight and plant haulm weight. The mutant alleles at the af and st loci seem, when homozygous, to have little effect by themselves upon seed weight but they do increase or decrease haulm weight, respectively. There is clear evidence of heterotic effects resulting from heterozygosity at each one of the three loci which modify seed weight, haulm weight and basal branching. The implications of such heterotic effects in pea breeding programmes are discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00278251
