3 research outputs found
Relationship between root and yield related morphological characters in pea (Pisum sativum L.)
Relation between morphological traits of the root system and yield related traits is an important issue concerning efforts aiming at improving of ideotype of cultivated plants species, including pea. In this paper, to analyse the dependency between traits describing the root system morphology and yield potential, Person’s and Spearman's correlations as well as canonical correlations were used.
Root system was analyzed in 14 and 21 day-old seedlings growing in blotting-paper cylinders. Yield po- tential of pea was analysed in a field experiment. Results of Person’s and Spearman's correlations revealed that number of lateral roots and lateral roots density were correlated witch yield related traits. Correlation between root length and shoot length was observed only for 14 day-old seedlings. The result of canonical correlations revealed that number of lateral roots and lateral roots density had the largest effect on yield re- lated traits. This work highlights, that in order to improve the yield of pea it might become necessary to under- stand genetic determination of morphological traits of the root system, especially number of lateral roots
Genetic diversity and differentiation of Pinus sylvestris L. from the IUFRO 1982 provenance trial revealed by AFLP analysis
DNA markers have become effective tools in genetic diversity studies of
forest trees. However, molecular marker analyses are associated with
laborious and costly effort. One of the possibilities to overcome these
constraints is to analyze bulked samples per population, rather than
individual plants. We have used bulked DNA-based AFLP analysis to investigate
genetic variations in Pinus sylvestris L. (Scots pine) from the IUFRO 1982
provenance trial in Kórnik (western Poland). Four AFLP primer combinations
yielded a total of 309 bands, of which 208 (67.31%) were polymorphic.
Thirty-six (11.65%) unique alleles were deployed randomly among the
populations. Estimated genetic diversity and differentiation was high, as
expressed by He = 0.238 and I = 0.356, and by genetic distance values which
ranged from 0.154 to 0.363. A geographic pattern of interpopulation
differentiation was observed, pointing to the individual character of
populations from northeastern Europe. In the light of available data, we
discuss the influence of historical migration routes, gene flow and human
activity on observed genetic diversity and differentiation of Scots pine in
Europe. Our results indicate that the AFLP method applied to DNA templates
extracted from bulked leaf samples provides an efficient approach to
elucidate genetic diversity and relationships among Scots pine populations