برآورد وراثت پذیری و کنترل ژنتیکی صفات مهم لاین‌های اینبرد خیار گلخانه‌ای

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی سابق کارشناسی ارشد، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه آزاد اسلامی، واحد اصفهان (خوراسگان)، اصفهان، ایران.

2 استادیار، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه آزاد اسلامی، واحد اصفهان (خوراسگان)، اصفهان، ایران.

3 مربی، گروه زراعت و اصلاح نباتات، دانشکده کشاورزی، دانشگاه آزاد اسلامی، واحد اصفهان (خوراسگان)، اصفهان، ایران.

چکیده

این پژوهش با هدف برآورد وراثت‌پذیری، قدرت ترکیب‌پذیری و کنترل ژنتیکی صفات مهم در لاین‌های اینبرد خیار گلخانه‌ای طی دوسال 1394 و 1395 انجام شد. مواد ژنتیکی این آزمایش شامل 52 هیبرید بود که از مجموع 10 لاین نر و 27 لاین ماده بدست آمد و در قالب دو آزمایش مجزا بررسی شد. آزمایش‌ها به‌صورت طرح I کارولینای شمالی بر پایه طرح بلوک کامل تصادفی با سه تکرار اجرا گردید. نتایج نشان داد که والدهای نر 1، 2 و 13 سبب افزایش در صفات رویشی در هر دو آزمایش شدند. برآورد پارامترهای ژنتیکی برای صفات رویشی حاکی از پایین بودن واریانس افزایشی و توارث‌پذیری خصوصی بود. بیشترین تعداد کل میوه در آزمایش اول در والد نر 7 بدست آمد. همچنین از نظر صفات مرتبط با عملکرد، لاین‌های نر 7 و ۱۵ سبب افزایش عملکرد میوه شدند. آزمایش دوم نشان داد که طول دوره میوه‌دهی در والد نر 10 و تعداد میوه در گره در والد نر 3 بیشترین مقدار بودند. از نظر سایر صفات زایشی تفاوتی مشاهده نشد. برآورد پارامترهای ژنتیکی نشان داد در بسیاری از صفات مرتبط با میوه از قبیل قطر میوه، سفتی بافت میوه، تعداد و عملکرد میوه واریانس افزایشی و توارث‌پذیری خصوصی بالاست و امکان انتخاب موفقیت‌آمیز بر اساس این صفات وجود دارد. در بین لاین‌های نر مورد مطالعه، لاین‌های 15، 13، 7 و 24 سبب افزایش بیشتر در صفات مربوط به میوه و عملکرد میوه شدند.

کلیدواژه‌ها


عنوان مقاله [English]

Estimation of Heritability and Genetic Control of Important Traits in Greenhouse Cucumber Inbred Lines

نویسندگان [English]

  • Mehrdad Kiani 1
  • Maryam Golabadi 2
  • Abdol-Reza Eghtedari 3
1 Former M. Sc. Student, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan (Khorasgan), Iran.
2 2. Assistant Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan (Khorasgan), Iran.
3 Lecturer, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Isfahan (Khorasgan) Branch, Islamic Azad University, Isfahan (Khorasgan), Iran.
چکیده [English]

This experiment was conducted to investigate heritability, combining ability and genetic control of important traits of greenhouse cucumber inbred lines in 2015-2016. The genetic materials used in this experiment were 52 hybrids from 10 male and 27 female cucumber inberd lines which were examined in two separate experiments. These experiments were carried out as North Carolina Design I using randomized complete block design with three replications. The results showed that male parents 1, 2 and 13 had the highest values of vegetative traits in both experiments. Estimation of genetic parameters for vegetative traits also indicated low levels of additive variance and narrow-sense heritability. The highest total number of fruits in the first experiment was observed in male parent number 7. Regarding fruit yield related traits, male lines number 7 and 15 in the first experiment had higher fruit yield. The results of second experiment showed that the longer fruit production duration and higher number of fruit per node belonged to male parents 10 and 3, respectively. There was no significant differences for other fruit related traits. Estimation of genetic parameters showed that in many of traits associated with fruit such as fruit diameter, fruit firmness, fruit number and yield, the additive variance and narrow-sense heritability were high, therefore, it is possible to select successfully for these traits. In general, male inbred lines number 7, 13, 15, and 24 contributed to increasing of fruit-related traits and fruit yield in progenies.

کلیدواژه‌ها [English]

  • Cucumber
  • broad sense heritability
  • narrow sense heritability
  • additive variance
  • fruit yield
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