Ø  Puffs are seen in polytene chromosomes.

Ø  Pulses are deficient in methionine and tryptophan

Ø  Pure line is genetically pureform.

Ø  Pure line is progeny of single homozygous plant of self pollinated species and are homozygous and homogenous.

Ø  Purpose of emasculation is to prevent self pollination

Ø  Pyrosequencing is a replication-based sequencing method in which addition of the correct nucleotide to immobilized template DNA is signalled by a photometrically detectable reaction. Useful in SNP marker analysis

Ø  Pyschrometer is study of tissue water potential

Ø  QTL for GCA is NILS.

Ø  QTL term was coined by Geldermann.

Ø  Quasidiploid stage is when 2n+1-1.

Ø  Quickest method of plant breeding is Domestication.

Ø  R banding technique is reverse of q and G banding.

Ø  Radiation reflecting type? kaolin (5%).

Ø  Rag Doll Method/Paper Method is a method of testing seed germination.

Ø  Random genetic drift is Non-directional force of evolution.

Ø  Random mating in which each female gamete has equal chance to unite with every male gamete. Random mating with selection increases the frequency of alleles for which selection is practised and reduces the frequency of other alleles.

Ø  Range of Correlation coefficient lies between -1 to +1.

Ø  Range of Regression coefficient lies between – infinity to + infinity.

Ø  Rapeseed varieties with low erucic acid are called as? Single zero varieties

Ø  Rapeseed varieties with low erucic acid, low glucosinolates and low fibre are called as? Triple zero varieties.

Ø  Rapid advancement of generation of cross is the objective of? Single seed descent method.

Ø  Ratio of genetic variance to total variance which determines the relationship between genotype and phenotype is known as heritability.

Ø  RBD is used when fertility moves in one direction only.

Ø  Reciprocal recurrent selection method is 1st developed by? Comstock, Robinson and Harvey.

Ø  Reciprocal recurrent selection is observed when both additive and non-additive gene action is present.

Ø  Recombinant DNA involves the deliberate alternation of an organism’s genetic material.

Ø  Recombination occurs in four strand stage.

Ø  Rectangular size tag has 3 x 2 cm.

Ø  Recurrent backcrossing replaces the genes of non-recurrent parent by those of the recurrent parent at the same rate as it reduces heterozygosity.

Ø  Recurrent selection is effective when the population is self pollinated.

Ø  Red revolution - Meat and tomato.

Ø  Rediscovery of Mendel’s work was done by? Hugo de Vries, Erich Correns and Erich Tschermak (1900)

Ø  Reduction or loss of vigour and fertility due to inbreeding is called as? Inbreeding depression

Ø  Registered seed is produced from? Foundation seed

Ø  Relationship between chromosomes by descent are called homoeologous chromosomes.

Ø  Ra fisher divided genetic variance into additive, dominance and epistatic components.

Ø  RAPD techniques proposed by Williams.

Ø  Recessive epistatisis supplementary epistatisis) is a type of genetic interaction in which recessive allele at one locus can mask the expression of both the alleles at other locus resulting in 9:3:4 ratio.

Ø  Reciprocal recurrent selection was proposed by -Comstock, Robinson and Harvey (1949)

Ø  Recurrent selection for specific combining ability (RSSCA) was first proposed by Hull (1945)

Ø  Renner gave study of plastid inheritance in Oenothera.