| تعداد نشریات | 286 |
| تعداد نشریات سازمان | 84 |
| تعداد شماره‌ها | 3,006 |
| تعداد مقالات | 33,641 |
| تعداد مشاهده مقاله | 44,531,457 |
| تعداد دریافت فایل اصل مقاله | 30,366,137 |
بررسی کاریوتیپ گونه هایی از یونجه های یکساله (.Medicago spp) با استفاده از روشهای آماری چند متغیره | ||
| تحقیقات ژنتیک و اصلاح گیاهان مرتعی و جنگلی ایران | ||
| مقاله 1، دوره 6، شماره 1 - شماره پیاپی 6، آبان 1380، صفحه 1-23 اصل مقاله (736.12 K) | ||
| شناسه دیجیتال (DOI): 10.22092/ijrfpbgr.2001.115866 | ||
| نویسندگان | ||
| آناهیتا شریعت* 1؛ حسین میرزایی ندوشن2؛ عباس قمری زارع2؛ محمد حسین سنگتراش3 | ||
| 1کارشناس ارشد اصلاح نباتات، موسسه تحقیقات جنگلها و مراتع، تهران، صندوق پستی 116-13185 | ||
| 2عضو هیئت علمی موسسه تحقیقات جنگلها و مراتع، تهران، صندوق پستی 116-13185 | ||
| 3عضو هیئت علمی دانشگاه سیستان و بلوچستان | ||
| کلیدواژه‌ها | ||
| یونجه یکساله؛ تجزیه خوشه ای؛ تجزیه به مولفه های اصلی؛ سیتوژنتیک؛ تقارب ژنتیکی | ||
| عنوان مقاله [English] | ||
| Karyotypic analysis of several annual medic species (Medicago spp) using multivariate methods of analysis | ||
| نویسندگان [English] | ||
| A. Shariat1؛ H. Mirzaie -Nodoushan2؛ A. Ghamari-Zare2؛ M. H. Sangtarsh3 | ||
| 1MSc. in Plant Breeding, Research Institute of Forests and Rangelands, P.O.Box 13185-116, Tehran, Iran | ||
| 2Research Institute of Forests and Rangelands, P.O.Box 13185-116, Tehran, Iran | ||
| 3Scientific board member of Sistan and Baluchestan University | ||
| چکیده [English] | ||
| In order to study the genetic variation among local and foreign accessions/ varieties of perennialryegrass (Lolium perenne) in Gene Bank of Natural Resources, an experiment was conducted in Alborz Research Center, Karaj, Iran. Seedlings of 29 genotypes were transplanted in the field using a complete block design with three replications. Each row plot was consisted of five spaced plants. Forage dry matter yield, basal cover, ear emergence date, pollination date, stem number, stem height and persistency at four harvesting dates were recorded. Data was analyzed using analysis of variance, principal components and cluster analysis. Analysis of variance showed significant differences among accessions/ varieties for all of the characters in each cutting, indicating the existence of genetic variation in (Lolium perenne) germplasm available in the Gene Bank of Natural Resources. Using principal component analysis, the first three components determined 72% of the total variation. Ear emergence date, pollination date, stem number and stem height in cut1 and annual dry matter were the most important traits in first components. Basal cover, stem number and stem height of cut 2 and persistency were the important traits in second components. The 29 genotypes were grouped into 5 clusters based on multivariate analysis of 16 classification variables. Accessions in cluster 1 averaged well above the overall mean for productivity and persistency. Only one accession was in cluster 2 that was late maturity and had lower dry matter yield, tiller number and tiller height. The accessions in cluster 3 were tetraploid and late maturity. They had more dry matter yield in cuts 2 and 3. Cluster 5 characterized by early maturity, higher dry matter yield, higher stem number and higher stem height in cut1. But, it was less persistent than other clusters. Distribution of genotypes based on the first two component scores was in agreement with cluster analysis. Considerable heterosis would be obtained in crosses between populations from more widely genetically separate groups. | ||
| کلیدواژه‌ها [English] | ||
| Annual medics, cluster analysis, principal components analysis, Genetic distance | ||
| مراجع | ||
|
| ||
|
آمار تعداد مشاهده مقاله: 260 تعداد دریافت فایل اصل مقاله: 257 |
||