NDLI: Selection for productivity, persistence and drought tolerance in orchardgrass

Content Provider	Springer Nature Link
Author	Saeidnia, Fatemeh Majidi, Mohammad Mahdi Mirlohi, Aghafakhr Shahidaval, Samane
Copyright Year	2016
Abstract	This study was aimed to evaluate genetic diversity for drought tolerance and persistency of Iranian and foreign germplasm of orchardgrass. Thirty six genotypes of orchardgrass were clonally propagated and grown in the field under two moisture environments (normal and drought stress) for 3 years (2013–2015). High genotypic variation was observed among genotypes for all the measured traits, indicating a high potential for improving traits. Drought stress had negative effects on most of the measured traits and reduced genotypic variation. Low heritability for forage yield (average 21 %) suggested that indirect selection based on components of forage yield which had moderate to high heritabilities and high correlation with yield would be more effective. However, the order of priority of these components and their direct and indirect effects was different for normal and drought stress conditions. This suggested that indirect selection for development of high yielding drought-tolerant varieties should be performed under non-stress environment with a specific model. The results of principal component analysis showed that there was a negative relationship between phenological traits (days to ear emergence and days to anthesis) with the traits related to persistency and yield production. This indicates that selection for earliness in orchardgrass can improve productivity and persistency in orchardgrass. Contrasting genotypes were identified by biplot method that is useful for development of genetic populations for breeding studies of drought tolerance and persistency in orchardgrass.
Starting Page	111
Ending Page	130
Page Count	20
File Format	PDF
ISSN	00142336
Journal	Euphytica
Volume Number	212
Issue Number	1
e-ISSN	15735060
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-09-19
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Clonal evaluation Dactylis glomerata Moisture stress Persistency Selection Plant Sciences Plant Genetics & Genomics Plant Pathology Plant Physiology Biotechnology
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science Horticulture Agronomy and Crop Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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