Screening of Canola (Brassica napus L.) Genotypes for Salt Tolerance Based on Early Growth Stage

Author: Irandokht Mansoori*, Hamid Najafe-Zarrini**, Nadali Babaean Jelodar*** and Ali Pakdin****

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Abstract

Soil salinity is a serious constrain to crop production in many areas of the world. In order to study the salinity stress effects resulted from sodium chloride on germination, vegetative growth in 100 rapeseed genotypes, an experiments was carried out in germinator at the Research Station of Sari Agricultural Sciences and natural Resources University. A factorial experiment based on completely randomized design with 3 replications was considered for evaluation of 300 treatments. The first factor of the experiment was 100 canola genotypes to identify genotypes with high or low level of tolerance to salt stress for further studies, and the second factor was salinity stress levels: 0, 6 and 12 dsm-1NaCl. The results showed that the principal components of measured parameters: germination percentage (GP), radicle length (RL) and plumule (stem) length (SL) and plumule fresh weight (PFW) of plumule dry weight (PDW) and radicle dry weight (RDW) was using principal component analysis that dete

Keywords

Genotypes, Germination, plumule length, Root weight, Salinity

Conclusion

One of the most important constraints to agricultural production in world is abiotic stress conditions prevailing in the environment. Salinity is one of the serious problem especially in the arid and semi-arid region. Furthermore use of tolerant plant in this region is important. The results showed that germination and plant early growth significantly affected by salinity. Plants in response to salinity divided into two, susceptible and tolerated groups. High germination percentage and vigorous seedling growth defines the tolerant genotypes. So the early growth of the plants is effective in the next growth of the plants, it is better to screen for sensitive and tolerant genotypes in the early stages of growth. On the basis of the above findings, it is concluded that germination, emergence, root and shot fresh/dry weight are significant screening criteria for salt tolerance in canola genotypes

References

Canola (Brassica napus L.) is considered as one of the most important oil seed crops all over the world, and even more in Iran, that its production has been notably extended in recent years. Canola seeds contains about 40-50 % oil of high quality for human consumption and the remaining is a high protein meal for livestock feed. Canola oil has the best fatty acid profile of any edible oil. It is characterized by less than 1 % Erucic acid and higher percent of oleic which has been shown to reduce serum cholesterol level. Canola is a moderately salt-tolerant crop, grown mainly for its edible oil. However, its production and quality are greatly reduced by soil salinity (Akbari et al., 2011). A major constraint to seed germination and seedling establishment of canola is soil salinity, which is a common problem in irrigated areas of Iran with low rainfall. This problem adversely affects growth and development of crop, and results into low agricultural production. The most common undesirable

How to cite this article

Irandokht Mansoori, Hamid Najafe-Zarrini, Nadali Babaean Jelodar and Ali Pakdin (2017). Screening of Canola (Brassica napus L.) Genotypes for Salt Tolerance Based on Early Growth Stage. Biological Forum – An International Journal 9(2): 208-216.