RT Journal Article
T1 Genetic control of B chromosome transmission rate in Zea mays ssp. mays (Poaceae)
A1 Rosato, Carmen Luisa Marcela
A1 Chiavarino, Amilcar
A1 Naranjo, Carlos
A1 Puertas, María
A1 Poggio, Lidia
AB We selected genotypes of high and low B chromosome transmission rate (TR) in a native race of maize (Pisingallo) from northwest Argentina. We made 20 female OB  male IB and 20 f.IB  m.OB crosses. The former (GOm) showed a large variation of B TR, with a mean of TR ± SE = 0.52 ± 0.06, ranging from 0.17 to 0.98. In the latter (GOf) the mean was TR = 0.47 ± 0.02 ranging from 0.31 to 0.58. Plants showing the highest and the lowest TR were selected to constitute the progenitors of the G1 generations. We made 19 f.0B  m.2B crosses, studying 24–30 plants per cross. The TR of the high (H) and low (L) lines in Glm (GlmH and GlmL) significantly differed (TRH = 0.65 ± 0.03, TRL = 0.40 ± 0.01), indicating that the H and L lines are different groups. The large variation in male TR suggests that preferential fertilization of gametes carrying B chromosomes does not always occur. We also selected plants showing high and low TR in the progenies of f.lB  m.OB crosses (GOf), and made 24 f.1B  m.0B crosses, studying 23–30 plants per cross. The TRs of the H and L lines in G1f (GlfH and GlfL) were significantly different (TRH = 0.48 ± 0.025, TRL = 0.40 ± 0.02). The TRs in G0f and G1fL were significantly different (TR = 0.47 ± 0.02 and 0.40 ± 0.02, respectively), while this was not the case between G0f and G1fH. Our results demonstrate the existence of genotypes controlling B TR in this native population of maize.
PB Botanical Society of America
SN 0002-9122
YR 1996
FD 1996
LK https://hdl.handle.net/20.500.14352/95301
UL https://hdl.handle.net/20.500.14352/95301
LA eng
NO Rosato, Marcela, et al. «Genetic Control of B Chromosome Transmission Rate in Zea Mays Ssp. Mays (Poaceae)». American Journal of Botany, vol. 83, n.o 9, septiembre de 1996, pp. 1107-12. https://doi.org/10.1002/j.1537-2197.1996.tb13890.x.
DS Docta Complutense
RD 5 abr 2025