Showing papers in "Journal of Genetics in 1970"
TL;DR: A species of the family Rubiaceae is described with measurements of style, anther height, pollen grain diameters and stigmatic papillae, and it is found that Thrum is more completely self-incompatible than Pin and the cross Pin X Thum is more fertile than the reciprocal.
Abstract: Heterostyly inHedyotis nigricans (Lam,) Fosb., a species of the family Rubiaceae is described with measurements of style, anther height, pollen grain diameters and stigmatic papillae. Results of pollination experiments in various crosses are reported. Thrum is more completely self-incompatible than Pin and the cross Pin X Thrum is more fertile than the reciprocal.
24 citations
TL;DR: Heterodistyly in Pentas lanceolat a (Forsk.) Delf, a species of the family Rubiaceae is described with measurements of style, anther, pollen grains and stigma papilla sizes as discussed by the authors.
Abstract: Heterodistyly inPentas lanceolat a (Forsk.) Delf., a species of the family Rubiaceae is described with measurements of style, anther, pollen grains and stigma papilla sizes. Homostyles with stamens and stigma at the same level in the same species is also reported.
18 citations
TL;DR: Homostyly in heterostyled Oldenlandia umbellata L., a species of the family Rubiaeeae, is described and among the incompatible crosses of heterostyles the incompatibility is absolute in thrums while it is slightly relaxed in pins.
Abstract: Homostyly in heterostyledOldenlandia umbellata L., a species of the family Rubiaeeae is described. Homestyles are of the short styled type. Measurements of homostyles are compared with the heterostyles. On the basis of self fertility the homostyles are named fertile and infertile. Results of pollination experiments in various combinations carried out within the heterostyles, in the homostyles and heterostyles are given. Among the incompatible crosses of heterostyles (both self and cross) the incompatibility is absolute in thrums while it is slightly relaxed in pins. Incompatibility is not observed in the bud pollinations. In the compatible pollinations the cross pin X thrum is more fertile than its reciprocal. The fertile homostyle is the most fertile. Among the crosses, the cross pin X fertile homostyle is most fertile while the cross infertile homostyle X pin is the least fertile.
11 citations
TL;DR: The hybrid males are fully sterile while the females are not only fertile but also show a high percentage insemination in the backcrosses.
Abstract: Of the three species,D. ananassae, D. bipectinala andD. malerkotliana, while the former reveals a complete reproductive isolation from the other two, the cross betweenD. bipectinata andD. malerkotliana is compatible in both directions. The hybrid males are fully sterile while the females are not only fertile but also show a high percentage insemination in the backcrosses. The cross betweenD. bipectinata female andD. malerkotliana male is more productive than the reciprocal one. The relationship between these three species has also been discussed in the light of these observations.
5 citations
TL;DR: The age and sex were found to have no significant effect on the occurrence of haemoglobin types and the population was found to be in Hardy-Weinberg equilibrium.
Abstract: The haemoglobin variants in 371Hariana and 39Hariana cross with local breed (Desi) were studied using the starch gel electrophoresis technique. Five different haemoglobin types were observed viz. HbBB, HbBG, HbBA, HbCA and HbAA. Out of these, HbBG has not been reported previously in Indian cattle. The age and sex were found to have no significant effect on the occurrence of haemoglobin types. The population was found to be in Hardy-Weinberg equilibrium.
4 citations
TL;DR: Results showed that the chromosome II contained genes for fecundity and hatchability which were more than in all the other chromosomes put together.
Abstract: 1.
An investigation was carried out inDrosophila melanogasler to find out the effect of an unchanged chromosome II and changing the remaining chromosomes on the fecundity and hatchability. The stocks selected differed distinctly from each other in respect of both the traits. They were N-2 which was a normal wild type strain maintained in the laboratory and C-l containing a marked and completely balanced chromosome II obtained from outside.
2.
Reciprocal crosses were made between N-2 and G-l Hies. Selecting F-l females with the marked chromosome in one case, repeated backcrosses were made with N-2 males from stock and in another case with C-l males. In each generation, the fecundity and the hatchability were noted.
3.
Results showed that the chromosome II contained genes for fecundity and hatchability which were more than in all the other chromosomes put together.
2 citations
TL;DR: Reports about the occurrence of supcrnunmvavy tcats (SNT) in cattle arc reports suggest that within a given breed wide variations wcrc obscrved alnong herds, variation was statistically significant.
Abstract: Reports about the occurrence of supcrnunmvavy tcats (SNT) in cattle arc. awfitable in a. lavgc measure for l ' ;uropcan breeds of cattle (F[ammond, 1927; Oifford, 1934; ']'ufl, 1950; Johansson, 1957 ; Mcscaninov, 1957 ; Skjcw, old, 1960 and \\,Vienev, 1962), For Indian cattle, Singh and lh*abhu (1966a) reported an overall rate of 1\"t.'6{~% for [ivc breeds, namely GanL, ah!ri, Hariana, Sahiwal, Simlhi and ThaqJarkar. The highest rate (30.77%) was [bund ill Si,,lhi and the lowest in Tharpadcar (11.60%), thougll within a given breed wide variations wcrc obscrved alnong herds. Thus in [-Iarianas, where 7 herds totalling \"1872 animals were CXalnincd, thc incidence varied fi'om 5\"82% to 16.66%. T h e variation was statistically'significant. [n Sahiwals, however, tile incidcncc varicd fi'om 21 .qq~ lo 28.31% alllollg 3 herds. This variation, however, was , J -~ t ( j
1 citations
TL;DR: The analysis of the experiment conducted by Taneja and Negi (1964) in respect of genotype X temperature interactions in Drosophila ananassae has been examined critically by emphasising the underlying genetical model and the estimates of the component variation along with their standard errors have been obtained afresh.
Abstract: The analysis of the experiment conducted by Taneja and Negi (1964) in respect of genotype X temperature interactions inDrosophila ananassae has been examined critically by emphasising the underlying genetical model and the estimates of the component variation along with their standard errors have been obtained afresh.
TL;DR: Comparisons of incidences of occurrence of blood-group factors for two herds each ofHariana, andJersey-Sindhi crossbred animals showed significant variations in their incidence amongst different herds within the same breed also.
Abstract: 1.
Isoimmunisations were done between pairs ofHariana cattle which resulted in production of 14 isoimmune sera. By selective absorption, 14 specific reagents were isolated from iso-immune sera prepared fromHariana cattle. The antibodies for the J factor are naturally present in serum of certain animals, therefore, the J-reagent was prepared fromKumaum-Hill cattle serum. While 11 reagents were comparable with internationally recognised reagents, four specific reagents could not be compared to any standard reagent; probably, they contained antibodies against some new factor present inHariana.
2.
Blood typing of about 157 heads ofHariana and 97 heads ofJersey-Sindhi crossbreds was done with the 15 reagents.
3.
The frequency of occurrence for theHariana andJersey-Sindhi crossbreds with respect to 15 antigens revealed highly significant differences with respect to six (C, R, W, J, M, Iz33) antigens and significant difference for the Zt’ factor.
4.
The comparisons of incidences of occurrence of blood-group factors for two herds each ofHariana, andJersey-Sindhi crossbred animals showed significant variations in their incidence amongst different herds within the same breed also.