Screening of Coriander Genotypes for Powdery Mildew Disease Resistance.

Twenty five genotypes of coriander were evaluated at Post Graduate Centre, UHS Campus, GKVK, Bangalore to screen the powdery mildew disease resistance, caused by Erisyphe spp is a serious disease. Among the genotypes, seventeen genotypes were highly susceptible, eight genotypes were susceptible and none of them showed resistance reaction.

Correlation Coefficient and Path Analysis in Coriander (Coriandrum Sativum L.) Genotypes.

Twenty-five coriander (Coriandrum sativum L.) genotypes were evaluated to estimate the correlation coefficient and path analysis in Randomized Complete Block Design with three replications. Seed yield per plant exhibited positive and significant correlation with plant height, plant spread, fresh and dry weight of plant, days to 50 per cent flowering, number of umbels per plant, number of seeds per umbellet, days to seed maturity and harvest index. The perusal of path analysis revealed that the traits viz., dry weight of plant and harvest index had higher direct and positive contribution towards seed yield. Therefore, great emphasis should be given for aforesaid characters while selecting for growth and yield related traits.

Study on Crossing Ability of Annual Chrysanthemum Genotypes.

The experiment comprised of six genotypes viz., NAC-01-10, NAC-02-10, NAC-03-10, NAC-04-10, NAC-05-10, NAC-06-10 selected for petal colour and number of layers of petals to estimate pollen viability, in-vitro pollen germination, stigma receptivity and crossed seed set percentage to find out the crossing ability of genotypes. The present experiment was laid out at the experimental field of Horticulture Section, College of Agriculture, Nagpur, during 2010-11. Pollen viability of six genotypes of annual chrysanthemum showed a range of 69.69% to 86.66% viability, Percentage of germination on the day of anthesis ranged from 22.72% (NAC-06-10) to 66.66% (NAC-01-10). First day pollen pollinated on first day stigma showed 100% stigma receptivity in all six genotypes and the crossed seed set ranged from 61.60% (NAC-04-10 × NAC-05-10) to 92.00% (NAC-01-10 × NAC-04-10) among direct crosses whereas, the percentage ranged from 42.00% (NAC-04-10 × NAC-02-10) to 90.00% (NAC-05-10 × NAC-01-10) among the reciprocal crosses. All the six genotypes are highly suitable for their use as parents in crossing program.