Determinations of chromosome number (2n) and endosperm balance number (EBN) in some little known tuber bearing Solanum
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چکیده
منابع مشابه
Tolerance to low temperatures and tuber soft rot in hybrids between Solanum commersonii and Solanum tuberosum obtained through manipulation of ploidy and endosperm balance number "EBN#
The objectives of this study were to evaluate the tolerance to low temperatures and tuber soft rot in hybrids between Solanum com! mersonii and Solanum tuberosum[ The experimental materials consisted of F0 triploid\ BC0 pentaploidÐnear pentaploid and BC1 tetraploidÐ near tetraploid hybrids[ The F0 triploids had a freezing tolerance and acclimatization capacity closest to S[ commersonii[ This in...
متن کاملThe role of 2n gametes and endosperm balance number in the origin and evolution of polyploids in the tuber-bearing Solanums.
Polyploidization has played a major role in the origin and evolution of polyploid species. In this article we outline the unique characteristics of 2n gametes and implications of their participation in the evolution of polyploid Solanum species. The genetic consequences of 2n gametes indicate that sexual polyploidization results in greater variability, fitness, and heterozygosity than does soma...
متن کاملThe importance of Arabidopsis seed mutants in the elucidation of the molecular basis of Endosperm Balance Number in tuber-bearing Solanum species.
The Endosperm Balance Number (EBN) is an important concept for potato breeding and has evolutionary importance in tuber-bearing Solanum species. The EBN is part of the post-zygotic hybridization barriers in the group and represents a reproductive isolating mechanism. Few genes have been proposed to be involved in its genetic control; until now, however, neither specific genes nor its molecular ...
متن کاملChromosome Number Variation in Iranian Populations of Acorus calamus
Different ploidy levels, diploid (2n=2x=24) to hexaploid (2n=6x=72) have been reported for Acorus calamus, a perennial medicinal plant. According to available information, there is a significant relationship between the ploidy level and essential oil compositions and medicinal properties of this important genetic resource. However, there is no information about the chromosome number of A. calam...
متن کاملTemperature response of plasma membranes in tuber-bearing solanum species.
Permeability coefficients (Kp) of nonelectroytes were determined at several temperatures for nonacclimated and acclimated plasma membranes of the frost sensitive Solanum tuberosum and the frost resistant Solanum commersonii. In nonacclimated membranes, Kp were equal at 25 degrees C for the two species. Kp decreased with decreased temperature in both species; however, the decrease was much great...
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ژورنال
عنوان ژورنال: Phytologia.
سال: 1992
ISSN: 0031-9430
DOI: 10.5962/bhl.part.4134