بررسی کنترل ژنتیکی عادت رشد در نتاج حاصل از تلاقی کدو خورشتی و کدو پوست تخم کاغذی با ‏استفاده از تجزیه میانگین نسل‌ها

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری، دانشکده علوم کشاورزی، دانشگاه گیلان، گیلان، ایران ‏

2 دانشیار، دانشکده علوم کشاورزی، دانشگاه گیلان، گیلان، ایران ‏

3 استاد، دانشکده علوم کشاورزی، دانشگاه گیلان، گیلان، ایران ‏

4 دانشیار، دانشگاه علوم کشاورزی و منابع طبیعی ساری، ساری، ایران ‏

چکیده

 انتخاب روش به نژادی مناسب به نوع و مقدار نسبی اجزای ژنتیکی بستگی دارد. در این مطالعه شش نسل P1، P2، F1، F2،BC1  و BC2 از تلاقی دو لاین کدو پوست تخم کاغذی و کدو خورشتی (S10×P25) تهیه و از نظر صفت طول ساقه ارزیابی شدند. هم­زمان صفات مربوط به عملکرد و اجزای آن (تعداد میوه در هکتار، تعداد بذر در میوه، وزن میوه و وزن صددانه) نیز ارزیابی شد. آزمایش در قالب طرح بلوک­های کامل تصادفی با سه تکرار در سال 1398 انجام شد. نتایج نشان داد تفاوت معنی­داری بین نسل­ها از نظر طول ساقه وجود داشت. آزمون­های مقیاس و مقیاس مشترک حاکی از وجود اپیستازی برای این صفت بود. واریانس افزایشی در رابطه با اکثر صفات از اهمیت بیشتری برخوردار بود، به این معنی که احتمالا گزینش می­تواند روش مناسبی برای بهبود این صفات باشد. در هیبرید F1 از نظر همه صفات هتروزیس بالا مشاهده شد. وراثت‌پذیری خصوصی برای همه صفات بالا به­دست آمد که نشان از اهمیت انتخاب در بهبود صفات بود. بنابراین با توجه به نتایج حاصل از آنالیز میانگین نسل‌ها و برآورد آثار ژنتیکی صفات به ویژه صفت مربوط به عادت رشدی و رسیدن به طول ساقه کوتاه­تر می­توان روش انتخاب را به کار گرفت.

کلیدواژه‌ها


عنوان مقاله [English]

Evaluation of the genes actions on growth habits of pumpkin in crossing of zucchini ‎and hull-less seeded pumpkin using generation mean analysis

نویسندگان [English]

  • Sima Davoodi 1
  • Jamal-Ali Olfati 2
  • Babak Rabiei 3
  • Atefeh Sabouri 2
  • Ghaffar Kiani 4
1 Ph. D. Student,, Faculty of Agricultural Science, University of Guilan, Guilan, Iran
2 Associat Professor, Faculty of Agricultural Science, University of Guilan, Guilan, Iran
3 Professor, Faculty of Agricultural Science, University of Guilan, Guilan, Iran
4 Associate Professor, Sari University of Agricultural Sciences and Natural Resources, Sari, Iran
چکیده [English]

Selecting an appropriate breeding method depends on the type and relative proportion of genetic components. In this study, six generations P1, P2, F1, F2, BC1 and BC2 from a cross between two cucurbita varieties crossing of hull-less seed pumpkin and squash, S10×P25, were constructed and evaluated for main stem length. Yield and its components (number of fruit per hectare, number of seeds per fruit, fruit weight and 100- seed weight) were also evaluated. The experiment was carried out in a randomized complete blocks design with three replications in 2019. The results showed significant differences among generations for main stem length. Scaling and Chi-square (χ2) tests suggests the presence of digenic epistasis for this trait. According to the results, additive variance was more important for most of the traits, meaning that selection is a good way to improve these traits. High heterosis was observed in the F1 hybrid for all of the traits. High narrow-sense heritability estimates were shown for all of the traits. Therefore, according to the results of estimating the genetic effects of traits, especially traits related to growth habit and reaching a shorter stem length, the selection method can be used.

کلیدواژه‌ها [English]

  • Additive effect
  • dominant effect
  • epistasis
  • narrow-sense heritability
  • selection
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