Hikam, Saiful and Denny, Sudrajat (2010) UTILIZATION OF GENETIC COMPONENTS AND HERITABILITY OF PHYSIOLOGICAL TRAITS IN FEMALE INBRED PARENTS IN DEVELOPING HYBRID AND SYNTHETIC MAIZE VARIETIES. Maize for Asia: emerging trends and technologies proceedings of the 10th Asian Regional Maize Workshop. pp. 88-91. ISSN 978-979-1159-41-8
|
Text
Utilization of Genetic Components.pdf Download (421kB) | Preview |
Abstract
Conventionally, parental inbred selection has been based on the combining ability of male parents utilizing diallel cross design Comstock and Robinson Design I or Design II. Those designs in maize require methodical crossing of a number of male and female parents and 3-4 plantings before one is enabled to identify males with good combining ability in the diallel design, or tester males in Design II. On the other hand, selecting for females with good combining ability is rather more straightforward since one actually measures the advantages in term of the physiological traits shown in the crossed progenies as compared to those of their female parents. This study was done in 2005 and 2006 to lay a strong foundation for a breeding program utilizing selected inbred females to develop superior hybrids and synthetic (open pollinated) progenies. In 2005 our objectives included (1) developing an appropriate unbiased method of statistical analysis in selecting females with good combining ability; (2) testing 10 female inbred populations for their combining abilities through a bulked-pedigree method; (3) deriving 10 single-cross F1 and 10 reciprocal hybrid-progenies; and (4) developing 5 synthetic progenies by intermating the 5 selected good-combining females. All hybrid and synthetic progenies were tested in 2006. The study resulted in (1) modified diallel analysis fit for testing good combining females, the tests of inbreds, diallel crosses and synthetic progenies indicated a significant relationship between general combining ability and cross population means, and the synthetic progenies may be useful in predicting superior inbreds suitable for good combining females; (2) the inbred populations showed high interpopulation variability which may simplify selection for certain desirable traits; and (3) the values for σ2M (maternal) and σ2NM (nonmaternal) measured a similar importance at >1 se and 2 se; σ2M being indicative of the presence of a maternal effect. The maternal effect for productivity was not proved.
| Item Type: | Article |
|---|---|
| Subjects: | S Agriculture > S Agriculture (General) |
| Divisions: | Fakultas Pertanian (FP) > Prodi Agronomi dan Hortikultura |
| Depositing User: | Dr. Saiful Hikam |
| Date Deposited: | 13 Mar 2023 08:07 |
| Last Modified: | 13 Mar 2023 08:07 |
| URI: | http://repository.lppm.unila.ac.id/id/eprint/48931 |
Actions (login required)
 |
View Item |