أنت هنا

Selection of high yielding and stable safflower (Carthamus tinctorius L.‎) genotypes under salinity stress

Safflower is among the most tolerant cash crops and many genotypes could display high yield under high water irrigation salinity.‎ The objective of this study was to investigate salinity tolerance on a large panel of safflower composed of 265 entries selected among the international collection.‎ During 2002/2003, all entries were evaluated in pots under 10 dS m-1 and only 52 entries were selected for field plot trials.‎ Field plot trials were conducted over two consecutive cropping seasons (2003/2005)‎ using three replications of irrigation water salinities corresponding to electrical conductivities of 10 and 15 dS m-1.‎ During 2003/2004, 52 entries were evaluated and in 2003/2004, eight additional entries were added to the trials (total of 60 entries).‎ All salinity levels, biological and grain yields and flower number averaged 6, 1.‎9 t ha-1 and 300 flowers per meter square, respectively.‎ Salinity reduced the latter variables by 50, 75 and 25%, respectively.‎ Some genotypes maintained their biological and grain yields at 7 and 2 t ha–1, respectively.‎ Relationships between yield components showed a threshold of 300 flowers under 15 dS m-1, which enabled many genotypes to display higher yields due to higher salinity tolerance during branching, flowering and grain filling stages compared to that of susceptible genotypes.‎ Stability analysis using genotypic ecovalence parameter showed that 10 genotypes were adapted to high salinity and 20 genotypes were adapted to intermediate salinity.‎ Based on yield building patterns and yield stability there were 13 genotypes that were selected out of the collection to constitute a nursery that is representative of the original collection over the whole range of variation for salinity response.‎

Authors: 
Belhaj, F.‎ M, Dakheel, A.‎ J, McCann, I, Abu Rumman, G, Shabbir, G.‎ M, Gailani, A.‎ A
Year: 
۲۰۱۳
Publication type: 
Scientific Paper
Publication Source: 
Agricultural Science Research Journal
Volume/Chapter/Issue: 
۳
Page Number: 
۲۷۳-۲۸۳.