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Sarun Khumto; Benjawan Rerkasem; Sansanee Jamjod. |
Cultivated rice (Oryza sativa L.) is self-pollinating, with flowering traits that exclude crosspollination. Hybrid rice seed production is therefore limited by low outcrossing rate between parental lines. To improve outcrossing ability in cultivated rice, common wild rice (O. rufipogon Griff.) was used as a source for outcrossing traits and backcrossed to Suphanburi 1 (SPR1) cultivated rice (BC2). In this study, F5 progenies of the backcross (BC2F5) were grown and evaluated for flowering traits in comparison with SPR1 parent. At flowering, florets were collected to measure the length of anthers and pistil. The anthers of SPR1 averaged 2.32 mm and pistil 1.50 mm, in length. The F5 population ranged 2.40 to 3.93 mm in anther length (3% to 170% of SPR1) and... |
Tipo: Collection |
Palavras-chave: Anther; Pistil; Outcrossing; Rice; ข้าว; เกสรตัวเมีย; การผสมข้าม; อับละอองเรณู; พันธุ์ลูกผสม; การคัดเลือก; แหล่งพันธุกรรม. |
Ano: 2012 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5334 |
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Phuttapong Manokam; Nattinee Phatarakul; Sansanee Jamjod; ฺำBenjavan Rerkasem. |
Rice plants with more roots are better at acquiring water and nutrients from the soil. But to study rice root system in the soil is time consuming and labour intensive, making screening for root traits in breeding programs difficult. The objective of this study was to compare root growth of two rice varieties with different rooting habits, Bue Bang and KDML105, in 8 rooting media, in order to develop a simple and rapid means for screening. The rooting media were T1, Sansai soil; T2, black loam soil; T3, 1:1 mixture (by weight) of black loam soil and fine sand; T4, 2:1 mixture of black loam soil and fine sand; T5, 1:1 mixture of black loam soil and coarse sand; T6, 2:1 mixture of black loam soil and coarse sand; T7, complete nutrient solution and T8,... |
Tipo: PhysicalObject |
Palavras-chave: Rice root; Root length; Root dry weight; Screening method; ข้าว; รากข้าว; ความยาวราก; น้ำหนักแห้งราก; วิธีการประเมิน; วัสดุปลูก; การคัดเลือกพันธุ์; การปรับปรุงพันธุ์. |
Ano: 2013 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5433 |
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