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Assessment of genetic variation among bread wheat genotypes based on yield-related traits | ||
| Iranian Journal of Genetics and Plant Breeding | ||
| دوره 12، شماره 1 - شماره پیاپی 23، تیر 2023، صفحه 37-52 اصل مقاله (937.48 K) | ||
| نوع مقاله: Research paper | ||
| شناسه دیجیتال (DOI): 10.30479/ijgpb.2023.19116.1353 | ||
| نویسندگان | ||
| Monireh Nazari1؛ Khalil Zaynali Nezhad* 1؛ Andreas Börner2؛ Mohammadhadi Pahlevani1 | ||
| 1Department of Plant Production, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. | ||
| 2Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany. | ||
| تاریخ دریافت: 15 مرداد 1402، تاریخ بازنگری: 15 آذر 1402، تاریخ پذیرش: 19 آذر 1402 | ||
| چکیده | ||
| Genetic diversity is a base for the survival and improvement of crops. This experiment was conducted to evaluate genetic diversity among 400 bread wheat genotypes based on nine quantitative yield-related traits. The results of descriptive statistics showed that the highest and lowest amount of phenotypic variation belonged to kernel weight per spike (34.61%) and kernel length (7.61%), respectively. Correlation coefficient analysis showed a strong and positive correlation between kernel weight and spike weight (0.97) followed by the number of kernels per spike and number of kernels per spikelet (0.91). Principal component analysis reduced the nine traits into three principal components that explained 85 percent of the total variation. Factor analysis revealed three underlying factors that explained 86 percent of the variation. Cluster analysis based on all the studied traits divided the genotypes into four clusters. The first cluster included 145 genotypes and had the lowest means for most of the traits. The second cluster included 43 genotypes and had the highest mean for kernel length. The third cluster included 77 genotypes that had the highest means for spike weight, kernel weight per spike, kernel width, and thousand-kernel weight. The fourth cluster included 135 genotypes and had the highest means for spike length, number of spikelets, kernels per spikelet, and kernels per spike. The results of this study can contribute to the understanding of genetic diversity among bread wheat genotypes and can be used for bread wheat improvement programs. | ||
| کلیدواژه‌ها | ||
| Bread wheat؛ Genetic diversity؛ Morphological traits؛ Multivariate analysis | ||
| عنوان مقاله [English] | ||
| ارزیابی تنوع ژنتیکی بین ژنوتیپ‌های گندم نان بر اساس صفات مرتبط با عملکرد | ||
| نویسندگان [English] | ||
| منیره نظری1؛ خلیل زینلی نژاد1؛ آندریاس برنر2؛ محمدهادی پهلوانی1 | ||
| 1گروه تولیدات گیاهی، دانشگاه علوم کشاورزی و منابع طبیعی گرگان، گرگان، ایران. | ||
| 2موسسه ژنتیک گیاهی و تحقیقات گیاهان زراعی لایب نیتس (IPK)، گاترسلبن، آلمان. | ||
| چکیده [English] | ||
| تنوع ژنتیکی اساس بقای گیاهان و بهبود محصولات زراعی است. در این پژوهش 400 ژنوتیپ گندم به منظور بررسی تنوع ژنتیکی بر اساس نه صفت کمی مرتبط با عملکرد، بررسی شدند. نه صفت کمی اندازه‌گیری شدند. نتایج آمار توصیفی نشان داد که بیشترین و کمترین ضریب تغییرات فنوتیپی به ترتیب مربوط به صفت وزن دانه در سنبله (61/%34) و طول دانه (61/%7) بود. بر اساس نتایج تجزیه همبستگی، بیشترین همبستگی مثبت بین وزن دانه در سنبله با وزن سنبله (97/0) و تعداد دانه در سنبلچه با تعداد دانه در سنبله (91/0) مشاهد شد. تجزیه به مولفه‌های اصلی، نه صفت کمی را به سه مولفه کاهش داد که در مجموع 85 درصد از واریانس کل را توجیه نمودند. در تجزیه به عامل‌ها تنها سه عامل حدود 86 درصد از واریانس کل را توجیه نموند. تجزیه کلاستر ژنوتیپ‌ها را به چهار گروه طبقه‌بندی نمود. گروه اول شامل 145 ژنوتیپ بود که کمترین میانگین را برای اکثر صفات مورد بررسی داشتند. گروه دوم شامل 43 ژنوتیپ با بودند که بیشترین میانگین صفت طول دانه را داشتند. گروه سوم شامل 77 ژنوتیپ بود که بیشترین میانگین وزن سنبله، وزن دانه در سنبله، عرض دانه و وزن هزار دانه را داشتند. گروه چهارم شامل 135 ژنوتیپ بود که ژنوتیپ‌های این گروه بطور میانگین طول سنبله، تعداد سنبلچه، تعداد دانه در سنبلچه، و تعداد دانه در سنبله بیشتری داشتند. نتایج این مطالعه به درک تنوع ژنتیکی در بین ژنوتیپ‌های گندم نان کمک می‌کند و بینش‌های ارزشمندی را برای برنامه‌های بهبود محصولات زراعی ارائه می‌کند. | ||
| کلیدواژه‌ها [English] | ||
| تنوع ژنتیکی, تجزیه و تحلیل چندمتغیره, صفات موفولوژیک, گندم نان | ||
| مراجع | ||
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