On the cause of seed failure or seed setting in 4n cultivatedcorchorus capsularis L.×2n cultivatedC. capsularis and 4n cultivatedC. olitorius L. ×2n cultivatedC. olitorius and their reciprocals through cytogenetical studies
01 Jan 1960-Genetica (Martinus Nijhoff, The Hague/Kluwer Academic Publishers)-Vol. 31, Iss: 1, pp 385-409
TL;DR: In this paper, the authors found that in 2n CG×4n CG and its reciprocals, the egg was found to be fertilized within 24 hours but in 2 n D 154× 4n D 154 and its reciprocal crosses no pod sets at all.
Abstract: 1
Pods set in both types of crosses (2n CG×4n CG and 4n CG×2n CG) Five pods are found to reach up to maturity in case of 2n CG×4n CG Pods set in case of the second cross shed within a week
2
In 2n D 154×4n D 154 and its reciprocal crosses no pod sets at all
3
The cross pods (2n CG×4n CG) are shorter than those of both parents
4
In 2n CG×4n CG and its reciprocals, the egg is found to be fertilized within 24 hours But in 2n D 154×4n D 154 and its reciprocals, pollen tube does not reach the ovule in one day
5
Complete fusion of the egg and the sperm in case of 2n CG×4n CG and its reciprocals is not observed even in two days But in case of 2n D 154×4n D154 and its reciprocals no fertilization is observed
6
Degeneration of ovules starts on the 3rd day in case of 4n CG×2n CG In 2n D 154×4n D 154 degeneration starts on the 2nd day and in its reciprocal degenerating ovules are marked on the 3rd day
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TL;DR: UPGMA (Unweighted Pair Group Method with Arithmetic Mean) analysis suggests a close relationship as well as distinctiveness between parents and the raised hybrid.
Abstract: A hybrid line (Corchorus capsularis L. – pollen parent × C. trilocularis L. – stigma parent) of jute (family: Tiliaceae) has been assessed for its stability (using cytomorphological parameters) and viability (using different stain tests including DAPI - 4′,6-diamidino-2-phenylindole) in advance generations (F4 to F6). The trueness of the hybrid is studied following the use of RAPD (random amplification of polymorphic DNA) markers. Results indicate that the hybrid line is stable, viable and true. UPGMA (Unweighted Pair Group Method with Arithmetic Mean) analysis suggests a close relationship as well as distinctiveness between parents and the raised hybrid. Upon considering different genetic efficiency parameters, taken together, it seems that OPA 02, OPA 03, OPB 01, OPB 02, OPB 06, OPC 01 and OPC 06 are effective and efficient RAPD markers for molecular screening of jute germplasms including hybrid(s). OPB 06 is found to be female specific RAPD marker.
4 citations
TL;DR: The genus Corchorus comprises species which are systematically widely related and a karyotypic study of these species will throw light on this aspect and breeders will then get a tool for handling this subject.
Abstract: In Corchorus sidoidesF. Muell ♀ x C. siliquosus L. ♂, the pod set was 19.05 per cent. and the percentage of pod harvested (out of set pods) was 100 per cent.. All seeds of the cross pods were non-viable.
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340 citations
TL;DR: The cytology of ha.ploid, dilfloid, triploid and totraploid S.' niffrum, S. niflrum, HETI'~IIOPr, OID 8o[, ,x . .xtf~ts . 1 6 9 A. ']Jim comparat.
Abstract: 11. iM I,Trnoi)s 135 A. The Format ion o[ Halfloid l?hmts 135 17;. The Format ion of Polyploid P lan t s 150\" I lL MoltrHot,oov or,\" Tin,' 1-[l,:rrt,mor~,OrD ,SO[,A~-O~IS 156 A. '.['ho eomparat,ive morphology of diploid, triploid and tel, rt~ploid tomatoes 157 B. The, eomp'l.ra, tive morphology of ha.ploid, diploid, grip|old and tetr+Lploid ,S'. niffrum, . Ill0 C. The, compa.rativo morphology of S. niWivm, S. htleu m, S. +nil~rum x l'uleu.m diploid and tetn~ploid l(i.l IV. (JY'I'OLO~:Y OF 'rKl~l HETI'~IIOPr, OID 8o[, ,x . .xtf~ts . 1 6 9 A. ']Jim comparat.ivo cyt,ology of diploid, t, riploid and tetraploid tontatoes . [(i9 B. The cytology of ha.ploid, dilfloid, triploid and totraploid S. ~dgrum 174 C. The cytology of N. niflrum, S. h+t.e+tm and S. uiffrum, x 1.to.m, diploid and tctraploid , 185
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