| Summary: | 碩士 === 國立中興大學 === 農藝學研究所 === 86 === To detect the changes of gene frequency of Indica-Japonica rice
hybrid progenies
using single seed descent (SSD) method, bulk method in the
field (BF) and in the
greenhouse (BG), four rice hybrids were crossed from four
Japonica types and two
Indica types. From F2 through F7 generations, the gene
frequencies od acid phosphatase
(Acp-1), peroxidase (Pox-1) and phenol reaction (Ph) were
investigated. The results
were summarized as follos:
1. All four hybrids derived from SSD, BF and BG methods had higher frequency in
Acp-1-4. In other words, the hybrid progenies were skewed in
favor of Indica parents
in Acp-1 locus.
2. The segregation ratio of Pox-1Nul and Pox-12A derived from
Java 14*CNS 6 in three
selection populations were in accordance with Mendelian ratio
theory. Consequently,
the gene which did not belong to Indica or Japonica type were not skewed.
3. All four hybrids derived from SSD, BF and BG methods had
higher frequency in Ph+
form. It methoded that hybrid progenies were skewed in favor of
Japonica parents in
Ph locus, therefore, the performance distribution of Ph was
equaled to that of Acp-1.
4. The results showed that the SSD population had the ability
of recovering population
variation. But these two populations that improved acclerated
generation cycle and BF
population were no differences in gene frequencies variation.
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