摘要:

AbstractThe response of oil content to phenotypic selection was studied in a population of lemongrass raised from seeds of a clonally propagated variety SD‐68. During November‐December 1982, 400 plants were evaluated for oil content. Five per cent of the evaluated plants were selected for high and low oil content and were separately intermated in isolated polycross (PC) blocks in November 1983‐February 1984. The populations derived from high and low oil PC blocks were evaluated, along with the unselected parental population and OD‐19, a variety used as a local check, in a randomized complete block design, during October 1984, January and May 1985 for leaf yield, oil content and citral content in oil. The high oil PC population had a significantly higher oil content than the unselected parental population and the local check OD‐19, during all the three seasons. The low oil PC population had a significantly lower oil content than the unselected parental population in January and May 1985. Over seasons, the high oil PC population had 0.15 per cent higher oil content than the unselected parent population. Realized heritabilities for high and low oil content were 0.52 and 0.50, respectively. No significant differences were observed between the different populations for leaf yield in all the three seasons and for citral content in October 1984. In January and May 1985, the differences in citral content were not related to the differences in oi

ISSN:0179-9541    

DOI:10.1111/j.1439-0523.1986.tb01305.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractInter‐generation correlations between F2‐F3, F2‐F4and F3‐F4in six crosses of chickpea were calculated by using individual plant/progeny means. In general, correlation values in case of plant height, seeds per pod and 100‐seed weight were higher between F3and F4than those between F2and F3and F2and F4. However, inter‐generation correlations were mostly non‐significant in case of pods per plant and grain yield. These results clearly show that selection in F3can be fruitful for seeds per pod and 100‐seed weight. However, selection for pods per plant and grain yield in early generations may not show any relationship with later generation performance f

ISSN:0179-9541    

DOI:10.1111/j.1439-0523.1986.tb01306.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractA mutant with yellow seedcoat colour was isolated by Nayar(1968) in the mustard variety‘Rai‐5′. This mutant was crossed to the national check cultivar ‘Varuna’ in order to develop improved strains with yellow seedcoat. Four such strains with yellow seeds were evaluated for their seed yield, yield components and percent oil. Two strains TM‐9 and TM‐17 were more productive than ‘Varuna’ in seed yield. All the yellow seeded strains showed higher oil percentage as compared to ‘Varuna’. The seedcoat in the yellow seeded strains accounts for 14‐15% of the seed weight as compared to 18% in the black seeded ‘Varuna’. The higher proportion of the cotyledons and embryo accounts for the increased oil percentage

ISSN:0179-9541    

DOI:10.1111/j.1439-0523.1986.tb01307.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractChromosomal variability inHelianthus annuuswas studied during the ontogenetic cycle of the plant. Aneusomaty originates during embryo development, progressively decreases in the course of plant growth and disappears at pre‐meiosis.A number of aberrant mitoses with lagging chromosomes were found in all embryonic stages examined; by contrast, mitoses never showed aberrations in the shoot apices of plant

ISSN:0179-9541    

DOI:10.1111/j.1439-0523.1986.tb01308.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY

摘要:

AbstractIn reciprocal crosses betweenPelargonium zonaleandPelargonium inquinansuniformly green, uniformly bleached and variegated plants occurred among the F1progeny. The effect has been described as hybrid variegation and also as hybrid bleaching. Because of the differences among the reciprocal crosses, it is assumed that thezonale‐plastids undergo normal development in hybrids, while the plastids ofPelargonium inquinansdo not develop normally due to their interaction with the nucleus of the hybrid. Using the results obtained in the experiments, the development ofzonale‐hybrids fromPelargoniumis discus

ISSN:0179-9541    

DOI:10.1111/j.1439-0523.1986.tb01309.x

出版商:Blackwell Publishing Ltd    

年代:1986

数据来源: WILEY