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Selection of rice (Oryza sativa L.) for higher yield and quality from crosses between tropical japonica and indica |
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| รหัสดีโอไอ | |
| Creator | 1. Nongyao Kaewwiset 2. Prapa Sripichitt 3. Tanee Sreewongchai 4. Supaporn Junbuathong |
| Title | Selection of rice (Oryza sativa L.) for higher yield and quality from crosses between tropical japonica and indica |
| Publisher | Genetics Society of Thailand |
| Publication Year | 2553 |
| Journal Title | Thai Journal of Genetics |
| Journal Vol. | 3 |
| Journal No. | 1 |
| Page no. | 60 |
| Keyword | tropical japonica rice, indica rice, pedigreeselection, new plant type |
| ISSN | 8578664 |
| Abstract | Selection of rice (Oryza sativa L.) for higheryield and quality was conducted by hybridizationbetween tropical japonica rice which had lowtillering capacity, large panicles with high number ofgrains and indica rice which possessed good grainquality including long, slender and translucent for 12crosses. The F1 plants produced were grown in thegreenhouse and the F2 to F3 progenies were plantedin the experimental field at Pathum Thani RiceResearch Center, Pathum Thani province. Selectionwas done in each succeeding generation from F2 toF3 using pedigree method for plants/lines which hadhigh yield and good agronomic characters. Preliminaryyield test of the 33 selected F4 lines, 7 parental linesand 5 check varieties (PTT1, CNT1, SPR1, SPR2and RD31) were conducted using augmented designin randomized complete block design at PathumThani Rice Research Center in rainy season 2009.The results showed that there were 15 from 33 testedF4 lines which gave higher yield than the highestyielding check variety SPR1. They showed the yieldvarying from 621 to 1,035 kg/rai while the checkvariety SPR1 gave the yield of 615 kg/rai. However,there were 4 lines which gave significantly higheryield than the check variety SPR1. These lines werePTT07288-20-1, PTT07288-11-4, PTT07288-20-3and PTT07288-14-2 which gave the yield of 1035,974, 968 and 939 kg/rai, respectively. The 6 parentallines manifested the yield ranging from 127 to 573kg/rai which were lower than the check varietySPR1. Grain physical quality and cooking and eatingquality of the 15 F4 lines were determined. It wasfound that there were 4 lines including PTT07288-11-4, PTT07285-21-2, PTT07266-8-6 and PTT07266-7-1 which exhibited good physical grain quality byhaving long, slender and clear grains or with slightlychalkiness. However, these lines manifested variablecooking and eating quality by having medium (20 -25%) to high (25-33%) amylose content. Consequently,the texture of cooked rice varied from soft andslightly sticky to hard and loose. Selection will bedone further for improving cooking and eatingquality in order to meet the requirement of customers |
