ترکیب‌پذیری لاین‌های ذرت از ژرم پلاسم حاره‌ای و نیمه حاره‌ای با استفاده از تسترهای مناطق معتدل

نویسندگان

1 دانشگاه علوم کشاورزی و منابع طبیعی گرگان

2 مؤسسه تحقیقات اصلاح و تهیه نهال و بذر، سازمان تحقیقات، آموزش و ترویج کشاورزی، کرج، ایران

3 مرکز تحقیقات بیوتکنولوژی تولید مثل، پژوهشکده فناوری‌های نوین علوم پزشکی، جهاد دانشگاهی ابن سینا، تهران

چکیده

این پژوهش به منظور ارزیابی ترکیب‌پذیری لاین‌های ذرت استخراجی از ژرم‌پلاسم حاره‌ای و نیمه ‌حاره‌‌ای سیمیت (CIMMYT) در تلاقی با تستر‌های مناطق معتدله انجام شد. به این منظور تعداد سی و شش ترکیب حاصله از تلاقی چهار تستر معتدله ذرت ( MO17از گروه لنکسترشورکراپ، و K18 لاین استخراج شده از MO17، B73 از گروه ریدیللودنت و K47/3 لاین به دست آمده ازB73) با نه لاین استخراجی از ژرم‌پلاسم ذرت سیمیت در قالب طرح بلوک‌های کامل تصادفی در سه تکرار در چهار منطقه کرج، دزفول، شیراز و کرمانشاه بررسی شدند. نتایج برآورد اثر ژن‌ها با تجزیه لاین در تستر نشان داد که علاوه بر اثر غالبیت، اثر افزایشی نیز در کنترل عملکرد دانه و دیگر صفات موثر بودند. بر اساس نتایج مقایسه میانگین عملکرد تلاقی‌ها، هیبریدهای شماره 32، 7 و 9 به ترتیب با میانگین عملکرد 641/8، 430/8 و 382/8 تن در هکتار پر‌محصول‌تر از سایر هیبریدها و شاهد بودند. این هیبریدها به ترتیب حاصل تلاقی لاین شماره 5 با تستر K18 و لاین شماره 7 و 9 با تستر MO17 بودند. برآورد ترکیب‌پذیری عمومی مشخص کرد لاین‌ شماره 5 پتانسیل استفاده مستقیم برای اصلاح عملکرد دانه در برنامه به‌نژادی ذرت را دارا است. ترکیب‌پذیری خصوصی عملکرد دانه تلاقی‌ها نیز بیان‌کننده ترکیب‌پذیری خصوصی مثبت و معنی‌دار تسترMO17 با لاین شماره 4 بود.

کلیدواژه‌ها

عنوان مقاله [English]

Combining Ability of Maize Lines from Tropical and Subtropical Germplasm using Temperate Testers

نویسندگان [English]

  • S. Taheri Tarigh 1
  • S. S. S. S. Ramezapour Ramezapour 1
  • R. Choukan 2
  • H. Soltanloo 1
  • S. Navabpour 1
  • K. Guilani 3
1 respectively, Gorgan University of Agriculture and Natural Resources, Gorgan, Iran.
2 Seed and Plant Improvement Institute, Agricultural Research, Education and Extension Organization (AREEO), Karaj, Iran.
3 Reproductive Biotechnology, Avicenna Research Institute, ACECR, Tehran, Iran.
چکیده [English]

This study aimed to assess the combining ability of maize lines derived from tropical and subtropical CIMMYT germplasm with temperate region tester lines. Thirty six crosses of four well-known temprate maize testers including a line from Lancaster Sure Crop hetrotic group (Mo17), a specific line derived from it (K18), a tester from Reid Yellow Dent hetrotic group (B73) and a particular line originate from it (K47/3) with nine lines originated from CIMMYT germplasm were evaluated using a randomized complete block design with three replications in Karaj, Dezful, Shiraz and Kermanshah for one year. The results of the gene action by line×tester analysis showed the additive and non-additive gene action in the expression of grain yield and other traits. Comparison of means results indicated that hybrids No. 32 had 8.641, No. 7 had 8.430 and No. 9 had 8.382 tha-1 grain yield.These hybrids were resulted from crossing line No. .5 with K18 and lines No. 7 and 9 with MO17 testers. Obtained results from general combining ability studies revealed that lines No. 5 had potential to be used directly for grain yield improvement. Specific combining ability of grain yield crosses showed a positive and significant SCA in case of line No. 4 with MO17 tester as well.

کلیدواژه‌ها [English]

  • Maize
  • Grain yield
  • specific and general combining ability
  • line×tester

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