著者

大西 近江 西本 登志

出版者

Genetics Society of Japan

巻号頁・発行日

vol.63, no.1, pp.51-66, 1988 (Released:2011-12-08)

著者

大西 近江 西本 登志

出版者

Genetics Society of Japan

雑誌

The Japanese journal of genetics (ISSN:0021504X)

巻号頁・発行日

vol.63, no.1, pp.51-66, 1988-02

著者

大西 近江

出版者

京都大学ヒマラヤ研究会; 京都大学霊長類学・ワイルドライフサイエンス・リーディング大学院; 京都大学ヒマラヤ研究ユニット

雑誌

ヒマラヤ学誌 (ISSN:09148620)

巻号頁・発行日

no.19, pp.106-114, 2018-03-28

---

The original birthplace of cultivated buckwheat was revealed to be the Sanjiang region of Sichuan- Yunnan-Tibet border area by surveying the wild ancestor of cultivated common buckwheat, Fagopyrum esculentum ssp. ancestrale Ohnishi and analyzing genetic relationships between the natural populations of the wild ancestor and cultivated populations of common buckwheat. The wild ancestor of cultivated buckwheat is shown to be growing only in southwest corner of China, a west part of Sichuan province, a northwest corner of Yunnan province and a southern part of East Tibet. It is shown by molecular genetic analyses that the natural populations of the wild ancestor from the Sanjiang region are the most closely related with cultivated common buckwheat. This closely relatedness is shown not to be due to recent hybridization between the wild ancestor and cultivated buckwheat, rather it is due to the fact that cultivated buckwheat was originated from the wild ancestor from the Sanjiang region. As a conclusion, cultivated buckwheat is originated from the wild ancestor from the Sanjiang region. This immediately negates the de Candoll's hypothesis on the origin of cultivated buckwheat which says that cultivated buckwheat was originated in Siberia or in the Amur river basin of northeastern part of China.

著者

大西 近江 長久保 有之

出版者

日本遺伝学会

雑誌

遺伝学雑誌 (ISSN:0021504X)

巻号頁・発行日

vol.57, no.6, pp.641-650, 1982

被引用文献数

3 5

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Allelism tests among 15 independently established dwarf lines revealed that five loci are involved in dwarfism in common buckwheat. They are designated dwA, dwB, dwC, dwD and dwE. The frequencies of dwarf mutants at four loci, dwA, dwB, dwC and dwD were investigated in three Japanese populations, Iwate, Togakushi, Higashi-Iyayama, by using four representative homozygous lines as the testers. The frequencies varied slightly among the populations, but on the average they were 0.235%, 0.067%, 0.294% and 0.196% for the dwA, dwB, dwC and dwD loci, respectively. These low allele frequencies imply that the recurrent mutation is balanced by selection against the dwarf alleles. This conclusion was confirmed by supplemental data on the frequency of dwarf mutants per gamete and a field survey of dwarf homozygotes in randomly mating populations in farmer′s field. Approximately 0.50% of the gametes contain a dwarf allele, whereas the incidence of dwarfism in the randomly mating populations was only 4.25 ×10^-6. The latter estimate was based on a study of more than 3 million plants.

著者

大西 近江

出版者

日本遺伝学会

雑誌

The Japanese journal of genetics (ISSN:0021504X)

巻号頁・発行日

vol.68, no.4, pp.303-316, 1993-08-25

参考文献数

28

被引用文献数

4 20

---

Allozyme variability at 19 loci affecting 12 enzymes was analyzed electrophoretically in 21 populations from Europe and six populations from the silk road. Most of the populations were polymorphic at seven loci, <i>Dia-2</i>, <i>Got-2</i>, <i>Mdh-1</i>, <i>Mdh-3</i>, <i>Pgm-1</i>, <i>Pgm-2</i> and <i>Sdh-1</i>. As compared with Chinese populations, European populations have completely lost variability at <i>Adh</i> and <i>6-Pgdh-1.</i> Populations from southern Europe have less variability than those from other parts of Europe. They have lost variability at <i>Pgm-2</i> and have a greatly reduced frequency of the F allele at <i>Mdh-1</i>; occasionally, however, they show an increase in the frequency of the U allele at the <i>Got-2 </i>locus. Southern European populations show an increase in the <i>det</i> allele and in grey colored varieties. As a group, European populations show the smallest genetic distance with populations from the silk road and northern China. Combining these genetic findings with written documents and archeological evidence, I conclude that European buckwheat came from northern China via the silk road, and that it changed in many respects within the last 500 years.<br>

著者

大西 近江

出版者

京都大学ヒマラヤ研究会; 京都大学霊長類学・ワイルドライフサイエンス・リーディング大学院; 京都大学ヒマラヤ研究ユニット

雑誌

ヒマラヤ学誌 (ISSN:09148620)

巻号頁・発行日

vol.19, pp.106-114, 2018-03-28

---

The original birthplace of cultivated buckwheat was revealed to be the Sanjiang region of Sichuan- Yunnan-Tibet border area by surveying the wild ancestor of cultivated common buckwheat, Fagopyrum esculentum ssp. ancestrale Ohnishi and analyzing genetic relationships between the natural populations of the wild ancestor and cultivated populations of common buckwheat. The wild ancestor of cultivated buckwheat is shown to be growing only in southwest corner of China, a west part of Sichuan province, a northwest corner of Yunnan province and a southern part of East Tibet. It is shown by molecular genetic analyses that the natural populations of the wild ancestor from the Sanjiang region are the most closely related with cultivated common buckwheat. This closely relatedness is shown not to be due to recent hybridization between the wild ancestor and cultivated buckwheat, rather it is due to the fact that cultivated buckwheat was originated from the wild ancestor from the Sanjiang region. As a conclusion, cultivated buckwheat is originated from the wild ancestor from the Sanjiang region. This immediately negates the de Candoll's hypothesis on the origin of cultivated buckwheat which says that cultivated buckwheat was originated in Siberia or in the Amur river basin of northeastern part of China.

著者

大西 近江 長久保 有之

出版者

Genetics Society of Japan

雑誌

The Japanese journal of genetics (ISSN:0021504X)

巻号頁・発行日

vol.57, no.6, pp.641-650, 1982-12 (Released:2011-12-08)

著者

大西 近江

出版者

Genetics Society of Japan

巻号頁・発行日

vol.68, no.4, pp.303-316, 1993 (Released:2011-12-08)