Comparison of QTLs for Early Elongation Ability between Two Floating Rice Cultivars with a Different Phylogenetic Origin
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概要
- 論文の詳細を見る
The ability to initiate stem elongation at the early growth stages of a plant is the major survival mechanism of floating rice in the presence of flooding. We previously identified two quantitative trait loci (QTLs) for this "early elongation ability" on chromosomes 3 and 12 using a Patnai23 (a non-floating cultivar)×Goai (a floating cultivar) F_2 population. The objectives of the present study were : (1) to identify QTLs for early elongation ability in the cross Habiganj Aman VIII (a floating cultivar)×Patnai23, and (2) to confirm the results obtained in our previous diallel analysis indicating that Habiganj Aman VIII might harbour additional gene(s) for early elongation ability compared with Goai. The genotype of a total of 192 F_2 plants was investigated using 85 (9 RFLP and 76 SSR) markers and the plants were assessed for early elongation ability. We scaled early elongation ability based on the position of the lowermost internode that exhibited elongation ("lowest elongated internode", LEI), since the LEI position parallels the time of the onset of stem elongation. As a result, a large QTL detected on chromosome 12 seemed to be common to the two crosses. A small QTL detected on chromosome 1 was unique to the Habiganj Aman VIII×Patnai23 cross, which was consistent with the results obtained in our previous diallel analysis. No QTLs were found on chromosome 3 in this cross. These results suggested that (1) the QTL on chromosome 12 might be the most important one for the expression of early elongation ability in terms of the to percentage of phenotypic variation and consistency in different backgrounds, and (2) diallel analysis might be an effective method for examining differences in genetic control among diverse parents.
- 日本育種学会の論文
著者
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NEMOTO Keisuke
Asian Natural Environmental Science Center, The University of Tokyo
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Ukai Y
Department Of Agricultural-environmental Biology Graduate School Of Agriculture And Life Sciences Th
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Ukai Yasuo
Graduate School Of Agricultural And Life Sciences The University Of Tokyo
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Ukai Yasuo
Graduate School Agricultural Life Science University Of Tokyo
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Nemoto Keisuke
Asian Natural Environmental Science Center The Univ. Of Tokyo
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Nemoto K
Asian Natural Environmental Science Center The University Of Tokyo
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Miyamoto Naoko
Graduate School Of Agriculture Tokyo University Of Agriculture And Technology
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Miyamoto Naoko
Asian Natural Environmental Science Center The University Of Tokyo
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Tang Ding
Asian Natural Environmental Science Center, The University of Tokyo
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Tang Ding
Asian Natural Environmental Science Center The University Of Tokyo:(present Address)key Laboratory F
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Kasai Yutaro
Asian Natural Environmental Science Center, The University of Tokyo
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Kasai Yutaro
Asian Natural Environmental Science Center The University Of Tokyo
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Tang Ding-qin
Asian Natural Environmental Science Center The University Of Tokyo:faculty Of Forest Resources And E
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Tang Ding‐qin
The Nurturing Station For The State Key Laboratory Of Subtropical Silviculture Zhejiang A & F Un
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