برآورد ترکیب‌پذیری لاین‌های پیشرفته کلزا برای عملکرد و اجزای عملکرد دانه

نویسنده

مرکز تحقیقات کشاورزی و منابع طبیعی

چکیده

به منظور برآورد قابلیت توارث و میزان ترکیب‌پذیری اجزای عملکرد، عملکرد دانه و صفات مرتبط، تلاقی‌های دای‌آلل یک طرفه هشت لاین کلزا شامل L41، Zafar، L56، L31، L22، LF2، L420 و L401 به همراه والدها در قالب طرح بلوک‌های کامل تصادفی با سه تکرار مورد بررسی قرار گرفتند. نتایج تجزیه دای‌آلل حاکی از معنی‌دار بودن میانگین مربعات ترکیب‌پذیری عمومی (GCA) برای تمامی صفات و ترکیب‌پذیری خصوصی (SCA) برای تمامی صفات به جزء وزن هزار دانه بود که نشان دهنده اهمیت اثر افزایشی و غیر فزایشی ژن‌ها در کنترل این صفات بود. برآورد قابلیت توارث خصوصی نسبتاً بالا برای صفات طول خورجین (50/0)، وزن هزاردانه (69/0)، عملکرد دانه (63/0) و شاخص برداشت (53/0) حاکی از اهمیت بیشتر اثر افزایشی ژن‌ها در کنترل این صفات بود. والدهای L41، Zafar و L22 با ترکیب‌پذیری مثبت و معنی‌دار برای عملکرد دانه در زمره ژنوتیپ‌های برتر قرار داشتند. دورگ‌های با ترکیب‌پذیری خصوصی مثبت و معنی‌دار برای عملکرد دانه دارای حداقل یک والد با ترکیب‌پذیری مثبت و معنی‌دار برای این صفت بودند. در این بررسی دورگ‌های L41×L22، L41×LF2،Zafar × L22 و Zafar × L420 به ترتیب با عملکرد دانه 7/3421، 3400، 1/3348 و 3/3311 کیلوگرم در هکتار به عنوان ژنوتیپ‌های برتر شناسائی شدند.

کلیدواژه‌ها


عنوان مقاله [English]

Estimation of Combining Ability of Rapeseed Advanced Lines for Yield and Yield Components

نویسنده [English]

  • V. Rameeh
چکیده [English]

To estimate the narrow-sense heritability and combining ability of seed yield and yield components, half diallel crosses of eight oil seed rape lines L41, Zafar, L56, L31, L22, LF2, L420 and L401 along with their parents were evaluated based on randomized complete block design with three replications. The results of diallel analysis revealed significant mean squares for general and specific combining abilities (GCA and SCA) in all traits except 1000-seed weight, indicating the importance of additive and non additive genetic effects for these traits. Estimation of high narrow-sense heritability for pods length (0.50), 1000-seed weight (0.69), seed yield (0.63) and harvest index (0.53) indicated the prime importance of additive genetic effects for these traits. Parents L41, Zafar and L22 with significant positive GCA effects for seed yield were determined as superior parents. The crosses with significant positive SCA effects for seed yield had at least one parent with significant positive GCA effects for this trait. The crosses L41× L22, L41×LF2, Zafar×L22 and Zafar×L420 with seed yield of 3421.7, 3400, 3348.1 and 3311.3 kgha-1, respectively were superior combinations.

کلیدواژه‌ها [English]

  • Oilseed rape
  • additive genetic effects
  • Diallel
  • Degree of dominance
  • heritability
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