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Pin Sokornthea. Development of method for F1 seed production of KUH3 and KUH4 three-line hybrid rice varieties. Master's Degree(Tropical Agriculture). Kasetsart University. Office of the University Library. : Kasetsart University, 2018.
Development of method for F1 seed production of KUH3 and KUH4 three-line hybrid rice varieties
Name: Pin Sokornthea
Classification :.LCCS: SB191.R5
LCSH:
Hybrid rice
LCSH:
Seed technology
Abstract:
F1 seed production is one of the key factors affecting the success of commercial hybrid rice. This research aimed to evaluate flowering synchronization, row ratios of A and R line and the effect of GA3 applied at different flowering stages on traits of parental lines in hybrid seed production. Field experiments were performed in the dry and wet seasons, and parents of KUH3 (IR80151A/KUR4-116) and KUH4 (HCSA/CH1) were tested with five row ratios (A:R): 1:1, 2:1, 2:2, 4:2 and 6:2. A micro-plot experiment was also employed for A line multiplication (HCSA/HCSB) under five treatments: applying GA3 at 0%, 10%, 30% and 50% at the heading stage and not applying GA3. Days to 50% flowering (DFF), growing degree days (GDD), effective accumulated temperature (EAT), seed setting rate (SSR), seed yield per plant (SYP), seed yield per hectare (SYH) and traits of these lines were measured. The results showed that KUH3 hybrid seeds were produced, while KUH4 hybrid seeds were not borne because of non-flowering synchronization of the parents in both seasons. KUR4-116 and HCSA required long DFF and high GDD or EAT to reach flowering compared to IR80151A and CH1. A significant difference in SSR, SYP and SYH of KUH3 seed production in the dry season was presented among the different row ratios, while no significant difference in SYH was exhibited in the wet season. Applying GA3 at different flowering stages significantly affected plant height, length of three uppermost internodes, panicle exsertion of both lines, and influenced stigma exsertion, SSR and SYP of A line. A row ratio of 4:2 and applying GA3 at 30% at heading stage can be used for increasing yields of hybrid rice seed production in the dry season.
Kasetsart University. Office of the University Library
Address:
Bangkok
Email:
tdckulib@ku.ac.th
Name: Tanee Sreewongchai
Role:
Thesis Advisor
Name: Damrongvudhi Onwimol
Role:
Thesis CO-Advisor
Created:
2018
Modified:
2025-07-04
Issued:
2025-07-04
วิทยานิพนธ์/Thesis
application/pdf
URL: https://www.lib.ku.ac.th/KUthesis/2561/sokornthea-pin-all.pdf
CallNumber:
SB191.R5 .P45
eng
DegreeName: Master of Science
Level: Master's Degree
Descipline: Tropical Agriculture
Grantor: Kasetsart University
©copyrights Kasetsart University
RightsAccess:
ใช้เวลา
0.023132 วินาที
Pin Sokornthea
| Title | Contributor | Type |
|---|---|---|
| Development of method for F1 seed production of KUH3 and KUH4 three-line hybrid rice varieties
มหาวิทยาลัยเกษตรศาสตร์ Pin Sokornthea | Tanee Sreewongchai | วิทยานิพนธ์/Thesis |
Tanee Sreewongchai
Damrongvudhi Onwimol
| Title | Creator | Type and Date Create |
|---|---|---|
| Seed infection and transmission of ustilaginoidea virens, causal pathogen of false smut of rice
มหาวิทยาลัยเกษตรศาสตร์ Somsiri Sangchote ;Damrongvudhi Onwimol | Kunlaya Prakobsub | วิทยานิพนธ์/Thesis |
| Ethanol production and mitochondrial-related gene expression during maize seed deterioration
มหาวิทยาลัยเกษตรศาสตร์ Damrongvudhi Onwimol;Pasajee Kongsil | Chalisa Chaengsakul | วิทยานิพนธ์/Thesis |