Agriculture One Liner
# The most widely used auxin herbiceds are 2-4-D,2,4,5-T’ MCPA
#Gibberellins were first discovered in japan
#The hormones also known as – Photo hormones , growth hormones , growth substances
#Main auxin is also known as –IAA
#Root promoting hormones is IBA
(Agriculture One Liner)
#The precursor of IAA is – Tryptophasne
#Synthesis of IAA in plants requires Zinc
#The term phytohormone for hormones of plants is suggested by – Thimann (1948)
#The term genetic resources was coined by – Frankel
#Mendel began his famous experiments on Pea in 1857
(Agriculture One Liner)
#Mendel Paper entitled “Experiments in Plant Hybridization “ was presented in German Language in two papers in 1865 (feb 8 and march 8)
#Mendel Paper published in the annual proceeding of society in 1866
#The term “Genetics” was coined by – Bateson (1905)
#The term gene , genotype and phenotype were used by – Johannsen in 1903
#Germplasm theory was proposed by Weismann
(Agriculture One Liner)
#Crossing over term was used first time by- Morgan and cttell in 1911
#Operon model of gene regulation was discovered by – Jacob and Monad 1961
#The term chromosome was coined by –Waldeyer in 1888
#One gene one enzmes hypothesis was proposed by- Beadle and Tatum In 1941
#First time gene was divided into cistron, muton and recon by Benzer (1955)
(Agriculture One Liner)
#Sex chromosomes are also known as allosomes
#Crossing over occurs in – Pachytene stage
#The tendency of two or more genes to remain together in the same chromsome during inheritance is referred to as – Linkage
#Chiasma type theory of crossing over was proposed by –Janssens
#Genic balance system of sex determination was proposed by- bridge in 1922
(Agriculture One Liner)
#Monogenic sex determination is found in – Asparagus , Papaya , maize , spinach etc.
#The homozygous progeny of a self – pollinated homozygous plant is known as – Pure lines
#The concept of purelines theory was developed by –Johannsen (1903), Danish biologist
#Breeding method for self -pollinated crops are – Pure line selection , Mass Selection , Progeny selection, Bulk Method, Pedigree method , single seed descent method , Back cross Method
#A multiline variety is a mixture of –Several pure lines
(Agriculture One Liner)
#Bulk method was first used by- Nelson Ehle in 1908
#The modification of bulk method is – Single seed descent
#In pure line Theory ,Johannsen was working on- Princess variety of Rajma
#Mass Pedigree Method was proposed by- Harrington in 1937
#The oldest method of selection is – mass Selection
(Agriculture One Liner)
#Progeny test was developed by –Louis de Vilmorin
#Progeny Test is also known as – Vilmorin isolation principle
#Single seed Descent method applied for the first time in oat in 1965 by – Graphius
#The term recurrent selection was coined by –Hull in1945
#The use of synthetic varieties for commercial cultivation was first suggested in maize by-Hayes and Garber , 1919
(Agriculture One Liner)
#Synthetic varieties are maintained by-open Pollination
#A synthetic variety can be developed from-Inbreeds, clones and open pollinated varieties .
#The general or basic concept in the development of synthetic varieties is – Exploitation of hybrid vigour
#The concept of disruptive mating and selection was developed by – Mather (1953) and Thody (1958)
#The Concept of dialled selective mating system was originally develped by – jonsen in 1970
(Agriculture One Liner)
#The hetrosis is also known as – Hybrid vigour
#The term heterosis was first used by – Shull in 1914
#Dominance theory was proposed by – Devenport in 1908
#The cross between inbred line and open pollinated variety was done in – top cross method
#The resistance of host to the particular race of a pathogen is known as – vertical resistance
(Agriculture One Liner)
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