Performance of new rice (Oryza sativa L.) genotypes obtained through anther culture under low water supply conditions
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Abstract
belonging to the National Institute of Agricultural Sciences,
during poorly rainy (cold) 2002 and rainy (spring) 2003 seasons,
the behavior of rice genotypes obtained by means of anther
culture was studied, as well as a group of mutants and
somaclones under low water supply conditions: the genotypes
8734 and 8735 (obtained through anther culture), 8551, 8552,
8553, IAC-27 (mutations), 8733, INCA LP-9 (somatic culture)
and the commercial �??Perla de Cuba�?� as a check variety. To
induce low water supply conditions, the following handling
was used: the water lamina was settled down 15 days after
germinated rice, suspending water entrance 35 days after
germinated rice and recovering it again in the primordium change
up to 50 % flowering. At harvest time, the final plant height,
crop cycle, agricultural yield (t.ha-1) also industrial yield (% of
whole grains) were evaluated, as well as resistance to lodging,
shattering, Pyricularia grisea, Sarocladium oryzae, and grain
discoloration. It was determined that genotype 8735 obtained
from anther culture showed an excellent behavior in the
agricultural and industrial yields, as well as in the main diseases
that economically affect this crop, such as grain discoloration.
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