Artificial Breeding Questions in English

(D) The process of grafting involves joining two plant parts,the stock and the scion. The first step in the union of these two parts is the proliferation of parenchyma cells from both the stock and the scion at the cut surface. This mass of undifferentiated,proliferating cells is known as callus. The formation of callus is the earliest event that bridges the gap between the stock and the scion,eventually leading to vascular connection and successful grafting. Therefore,option $D$ is correct.

(D) In the process of grafting,two plant parts are joined together.
$1$. The rooted plant that provides the root system is called the $Stock$ (or $Stalk$).
$2$. The plant part that is grafted onto the stock,which will produce the desired fruits or flowers,is called the $Scion$.
Therefore,the correct term for the part grafted onto the stalk is the $Scion$.

(C) The removal of stamens from a bisexual flower before anthesis is known as emasculation.
Emasculation is a crucial step in the process of hybridization.
It is performed to prevent self-pollination in the female parent,ensuring that the desired cross-pollination occurs.

(D) Plant hybridization is a process of crossing two genetically different individuals to produce a hybrid.
$1$. Emasculation involves the removal of anthers from the bisexual flower of the female parent to prevent self-pollination.
$2$. Bagging is the process of covering the emasculated flower with a bag to prevent contamination by unwanted pollen.
$3$. Crossing (or artificial pollination) is the transfer of pollen grains from the male parent to the stigma of the emasculated flower.
Since all these steps are essential components of the plant hybridization process,the correct answer is $D$.

(C) In plant breeding,specifically during hybridization,it is essential to prevent self-pollination. The process of removing stamens (anthers) from a bisexual flower bud before they dehisce is known as $Emasculation$. This ensures that the female reproductive parts are available for cross-pollination with the desired pollen grains.

(D) Emasculation is the process of removing the anthers from a bisexual flower to prevent self-pollination.
In unisexual flowers,the plant already possesses either only male or only female reproductive organs.
If the flower is female,it lacks anthers (male part),so there is no need for emasculation.
If the flower is male,it lacks a stigma (female part),so emasculation is irrelevant.
Therefore,emasculation is not performed in unisexual flowers.

(D) Gregor Mendel used artificial hybridization experiments to study the inheritance of traits in pea plants.
In these experiments,he performed two key steps:
$1$. Emasculation: The removal of anthers from the bisexual flower before they dehisce to prevent self-pollination.
$2$. Bagging: Covering the emasculated flower with a bag to prevent contamination by unwanted pollen grains.
Therefore,both emasculation and bagging are essential techniques used in his hybridization process.

(D) Emasculation is the process of removal of anthers from a bisexual flower before they dehisce to prevent self-pollination. This technique is a fundamental step in artificial hybridization,where a breeder wants to cross-pollinate a specific female parent with a desired male parent. Therefore,emasculation is associated with hybridization.

(C) In plant breeding programs,hybridization involves crossing two genetically different individuals. To prevent self-pollination in a bisexual flower,the stamens (male reproductive parts) are removed before the anthers dehisce. This process is known as Emasculation. After emasculation,the flower is covered with a bag to prevent contamination by unwanted pollen,a process called bagging.

(A) Emasculation is a technique used in plant breeding,specifically in artificial hybridization.
It involves the removal of anthers from a bisexual flower before they dehisce (release pollen).
This process is performed to prevent self-pollination and ensure that the stigma is pollinated only by the desired pollen grains.

(B) Hybrid plants are generally characterized by 'hybrid vigor' or 'heterosis'.
This phenomenon results in offspring that are more robust,healthier,and exhibit higher productivity compared to their parents.
Therefore,hybrid plants are generally stronger and more vigorous than their parent lines.

(B) Grafting is a vegetative propagation technique where the tissues of one plant (scion) are joined with the tissues of another plant (stock).
In this process,the scion determines the genetic makeup $(genotype)$ of the branches,leaves,flowers,and fruits produced.
The stock provides the root system and supplies water and minerals,but it does not influence the genetic characteristics of the fruit produced by the scion.
Therefore,the fruit quality and genotype are entirely dependent on the $scion$.

(A) Emasculation is a technique used in plant breeding to prevent self-pollination. In bisexual flowers,the anthers are removed from the flower bud before they dehisce,using a pair of forceps. This ensures that the female reproductive part (stigma) is not pollinated by the pollen from the same flower,allowing for controlled cross-pollination with a desired male parent.

(A) Artificial hybridization is a technique used by plant breeders to ensure that cross-pollination occurs only between desired parents.
$1$. Emasculation involves the removal of anthers from the flower bud of the female parent before they dehisce to prevent self-pollination.
$2$. Bagging involves covering the emasculated flower with a suitable bag (usually made of butter paper) to prevent contamination of the stigma by unwanted pollen grains.
Therefore,these techniques are primarily used to protect the stigma from contamination by unwanted pollen.

(D) Emasculation is a technique used in plant breeding to prevent self-pollination.
In bisexual flowers,the $Anther$ (the male reproductive part) is removed before it dehisces to release pollen grains.
This ensures that the stigma of the flower is only pollinated by the desired pollen from a selected male parent during artificial hybridization.

(A) Emasculation is the process of removing the anthers from a bisexual flower before they dehisce to prevent self-pollination (autogamy).
Bagging involves covering the emasculated flower with a bag to prevent unwanted pollen from reaching the stigma,thereby preventing cross-pollination with undesirable pollen.
These techniques are primarily used in artificial hybridization programs to ensure that the stigma receives pollen only from the desired male parent,thus preventing autogamy and ensuring controlled cross-pollination.
Therefore,these methods are specifically used to prevent autogamy.

(A) In the process of grafting,the first step after joining the stock and scion is the proliferation of parenchyma cells from both cut surfaces. This mass of undifferentiated cells is known as $Callus$. The formation of $Callus$ is essential to bridge the gap between the stock and the scion. Once the $Callus$ is formed,it facilitates the development of new vascular tissues and the reconnection of the cambium,eventually leading to a successful graft union.

(C) Emasculation is the process of removing anthers from a bisexual flower bud to prevent self-pollination.
In unisexual flowers,the plant already possesses separate male and female flowers.
Since the female flower does not contain stamens (male reproductive organs),there is no risk of self-pollination.
Therefore,emasculation is not required for unisexual flowers.

(B) In grafting,the scion is the upper part of the plant that is selected for its desirable traits,such as fruit quality,yield,or disease resistance. The stock is the lower part that provides the root system. Since the scion contains the genetic information that dictates the development of branches,leaves,flowers,and fruits,the quality of the fruits produced is determined by the genotype of the scion.

(N/A) Various artificial hybridization techniques,used in crop improvement programmes,involve the removal of anthers from bisexual flowers without affecting the female reproductive part (pistil) through a process called emasculation.
After emasculation,these flowers are covered with suitable bags,generally made of butter paper,to prevent contamination of the stigma by unwanted pollen grains.
This process is known as bagging.
This technique is crucial in plant breeding programmes because it ensures that only pollen grains from desirable plants are used for the fertilization of the stigma,thereby allowing the development of a plant variety with desired traits.

(N/A) Emasculation is the process of removing anthers from bisexual flowers without affecting the female reproductive part (pistil),which is used in various plant hybridization techniques.
Emasculation is performed by plant breeders in bisexual flowers to obtain the desired variety of a plant by crossing a particular plant with the desired pollen grain. To remove the anthers,the flowers are covered with a bag before they open. This ensures that the flower is pollinated by pollen grains obtained from desirable varieties only. Later,the mature,viable,and stored pollen grains are dusted on the bagged stigma by breeders to allow artificial pollination to take place and obtain the desired plant variety.

(N/A) Artificial hybridisation is a crop improvement technique where only desired pollen grains are used for pollination.
$1$. Emasculation: If the female parent bears bisexual flowers,the anthers must be removed from the flower bud before they dehisce using forceps. This prevents self-pollination.
$2$. Bagging: The emasculated flowers are covered with a bag,usually made of butter paper,to prevent contamination of the stigma by unwanted pollen.
$3$. Pollination: When the stigma of the bagged flower becomes receptive,mature pollen grains collected from the anthers of the selected male parent are dusted onto the stigma.
$4$. Rebagging: After pollination,the flowers are rebagged to allow the development of fruits from the desired cross.
If the female parent produces unisexual flowers,emasculation is not required. The female flower buds are simply bagged before they open,and pollination is performed when the stigma becomes receptive.

(N/A) Artificial hybridisation is a crucial technique in crop improvement because it allows breeders to cross-breed selected plants with desirable traits to produce superior offspring.
$1$. Emasculation: If the female parent bears bisexual flowers,the removal of anthers from the flower bud before they dehisce is necessary using forceps. This prevents self-pollination.
$2$. Bagging: The emasculated flowers are covered with a bag,usually made of butter paper,to prevent contamination of the stigma by unwanted pollen grains.
$3$. Pollination: When the stigma of the bagged flower attains receptivity,mature pollen grains collected from the anthers of the male parent are dusted on the stigma,and the flowers are re-bagged to allow fruit development.

(A) The correct sequence of steps in an artificial hybridization programme is as follows:
$1$. $(b)$ Selection of parents: Choosing plants with desired traits.
$2$. $(e)$ Emasculation: Removal of anthers from the flower bud of the female parent before they dehisce to prevent self-pollination.
$3$. $(c)$ Bagging: Covering the emasculated flower with a suitable bag (usually butter paper) to prevent contamination by unwanted pollen.
$4$. $(f)$ Collection of pollen from male parent: Gathering mature pollen grains from the selected male parent.
$5$. $(d)$ Dusting the pollen on stigma: Removing the bag temporarily to dust the collected pollen onto the receptive stigma of the female parent.
$6$. $(a)$ Re-bagging: Covering the pollinated flower again with the bag to allow fruit development without contamination.
Thus,the correct sequence is $(b), (e), (c), (f), (d), (a)$.

(N/A) Steps of controlled cross-pollination:
$1$. Selection of parents
$2$. Emasculation (removal of anthers from the flower bud of the female parent)
$3$. Bagging (covering the emasculated flower with a suitable bag)
$4$. Collection of pollen from the male parent
$5$. Dusting the pollen on the stigma of the female parent
$6$. Re-bagging (re-covering the pollinated flower)
Emasculation is not needed in a cucurbit plant because it produces unisexual flowers. In unisexual flowers,the male and female reproductive organs are present in separate flowers. Therefore,the risk of self-pollination is naturally absent,and manual removal of anthers is unnecessary.

(N/A) Emasculation is the process of removing the anthers from a bisexual flower.
It is performed to prevent self-pollination,ensuring that the plant is used only for cross-pollination in artificial hybridization programs.
It is done before the dehiscence of the anthers to ensure that the pollen grains do not mature and release,thus preventing self-fertilization.

(A) $Emasculation$ is the removal of anthers from the flower bud of a bisexual plant before they dehisce to prevent self-pollination.
$Bagging$ is the process of covering the emasculated flower with a suitable bag, usually made of butter paper, to prevent contamination of its stigma with unwanted pollen grains.
These two techniques are essential steps in $artificial \text{ } hybridization$ to ensure that the cross-pollination occurs only with the desired pollen grains.

(B) Emasculation is a technique used in artificial hybridization in bisexual flowers.
It involves the removal of anthers from the flower bud before they dehisce (release pollen) to prevent self-pollination.
Therefore,the correct procedure is the removal of anthers before dehiscence.

(A) The $Bagging$ technique is a crucial step in artificial hybridization in flowering plants.
In this process, the emasculated flowers are covered with a suitable bag, generally made up of butter paper, to prevent contamination of its stigma with unwanted pollen grains.
Therefore, butter paper is the correct material used for $Bagging$.

(C) Emasculation is the process of removing the anthers from a bisexual flower to prevent self-pollination.
In dioecious plants,the male and female flowers are borne on separate plants.
Since the female plant does not produce any pollen,there is no risk of self-pollination.
Therefore,emasculation is not required in dioecious plants.

(C) The $bagging$ technique is a crucial step in artificial hybridization.
In this process, the emasculated flower is covered with a suitable bag, generally made up of butter paper, to prevent contamination of its $stigma$ with unwanted pollen grains.
Therefore, the primary purpose of $bagging$ is to protect the $stigma$ from unwanted pollination.

(B) In plant breeding programs,hybridization involves crossing genetically different individuals.
To prevent self-pollination in a bisexual flower,the stamens (male reproductive parts) are removed before the anther dehisces.
This specific process of removing stamens from the flower bud is known as $Emasculation$.
After emasculation,the flower is covered with a bag to prevent contamination by unwanted pollen,which is known as $Bagging$.

(B) In dioecious plants,male and female flowers are borne on separate plants.
Since the plant is already unisexual,there is no risk of self-pollination from the same flower.
Therefore,the process of 'Emasculation' (removal of anthers from the flower bud) is not required because the plant does not possess both reproductive organs in the same flower.
Bagging is still required to prevent contamination from unwanted pollen grains.

(A) Emasculation is a technique used in plant breeding to prevent self-pollination.
In this process,the anthers are removed from the bisexual flower bud using a pair of forceps before they dehisce (release pollen).
This ensures that the stigma of the flower is only pollinated by the desired pollen grains from a selected male parent.

(A) Emasculation is the process of removing anthers from a bisexual flower before they mature. This technique is used in plant breeding to prevent self-pollination and ensure that the flower is pollinated by the desired pollen grains.

(D) Emasculation is the process of removing anthers from a bisexual flower before they mature to prevent self-pollination. This technique is a crucial step in artificial hybridization,where breeders cross-pollinate specific plants to produce offspring with desired traits.

(C) Bud grafting is a type of grafting technique where a single bud is used as the scion instead of a twig.
This method is widely and successfully employed in the propagation of $Rose$ plants to produce high-quality flowers.
It is preferred for its efficiency and high success rate in commercial floriculture.

(B) Grafting is a method of vegetative propagation where tissues from one plant (the scion) are joined to those of another (the stock).
Because grafting is a form of asexual reproduction,the scion develops into a plant that is genetically identical to the parent plant from which it was taken.
This ensures that the desired traits,such as fruit quality,disease resistance,or growth habit,are preserved in the offspring,which is not guaranteed when propagating through seeds due to genetic recombination during sexual reproduction.

(A) Grafting is a horticultural technique where tissues of plants are joined so as to continue their growth together.
In this process,the upper part of the grafted plant is called the $scion$,which is selected for its desirable characteristics such as fruit quality or flower color.
The lower part,which provides the root system,is called the $stock$.
Therefore,the $scion$ develops into the aerial part of the plant,which is the $shoot$ $system$.

(B) In the process of $Grafting$,two different plant parts are joined together so that they grow as a single plant.
The upper part of the plant that is selected for its desirable traits (like fruit quality or flower color) is called the $Scion$.
The lower part,which is rooted in the soil and provides the root system,is called the $Stock$.
Therefore,the term $Scion$ is specifically used in the context of $Grafting$.

(A) Air layering (gootee) is a method of vegetative propagation where a branch is induced to form roots while still attached to the parent plant. It results in a clone of the parent plant,not a composite plant.
In grafting,two different plant parts,the $Stock$ (the rooted base) and the $Scion$ (the shoot system of another plant),are joined together to form a single composite plant.
Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for why air layering does not produce a composite plant.

(D) Emasculation is the process of removing the anthers from a bisexual flower to prevent self-pollination.
In a pistillate flower,the male reproductive organs (anthers) are absent,so there is no risk of self-pollination.
In a staminate flower,the female reproductive organs (pistil) are absent,so it cannot be used as a female parent for cross-pollination.
Therefore,emasculation is not required for either pistillate or staminate flowers.

(A) Emasculation is the process of removing the anthers from a bisexual flower before they dehisce,specifically in the female parent plant.
This is done to prevent self-pollination,ensuring that the stigma receives pollen only from the desired male parent during artificial hybridization.

(A) Emasculation is the process of removing anthers from the flower bud before they dehisce (mature) in bisexual flowers to prevent self-pollination. Therefore,the statement that emasculation involves removing anthers in their mature condition is incorrect,as the anthers must be removed before they mature and release pollen.

(B) Emasculation is a technique used in plant breeding where the anthers of a bisexual flower are removed before they mature and dehisce. This is done to prevent self-pollination and ensure that the flower is pollinated by the desired pollen grains during artificial hybridization. Bagging is a subsequent step where the emasculated flower is covered with a bag to prevent contamination by unwanted pollen.

(C) Artificial hybridization is a technique used in plant breeding to produce crops with desired traits.
In bisexual flowers,the anthers are removed before they dehisce (emasculation) to prevent self-pollination,and the flower is covered with a bag (bagging) to prevent contamination by unwanted pollen.
In unisexual flowers,emasculation is not required because the flower is already either staminate or pistillate. Therefore,only bagging of the female flower is performed to prevent pollination by unwanted pollen.
Thus,the statement that emasculation and bagging are performed in unisexual flowers is incorrect.

(A) In artificial hybridization,the goal is to ensure that only the desired pollen grains reach the stigma.
$(a)$ If the plant produces unisexual flowers,the female flower buds do not need to be bagged because they do not contain anthers,thus preventing self-pollination naturally.
$(b)$ Unisexual flowers do not have stamens (anthers),so emasculation (removal of anthers) is not required.
$(c)$ This statement is incorrect; bagging is done immediately after emasculation to prevent unwanted pollination,not after cross-pollination.
$(d)$ This is the standard procedure for bisexual flowers to prevent self-pollination.
$(e)$ This statement is incorrect; protogyny (stigma maturing before anthers) can be used for cross-pollination by selecting appropriate parents.
Therefore,statements $(a), (b),$ and $(d)$ are correct,but since the options provided require selecting the best fit,we analyze the standard procedure: $(a)$ and $(b)$ are correct. Statement $(d)$ is the standard definition of bagging. Thus,$(a), (b),$ and $(d)$ would be the ideal set,but based on the provided options,the most accurate selection is $(a), (b)$ and $(d)$ which is not listed,however,$(a), (b)$ and $(c)$ is often cited in specific contexts where bagging is re-applied. Re-evaluating the standard $NCERT$ text: $(a)$ and $(b)$ are definitely correct. $(d)$ is the definition of bagging. Given the options,$(a), (b)$ and $(d)$ is the correct logic,but since it is not an option,we select the closest logical grouping.

(B) Grafting is an artificial method of vegetative propagation used in plants.
In this process,two different plant parts are joined together.
The rooted plant part that provides the root system is called the $stock$.
The part of the stem containing a bud that is grafted onto the stock is called the $scion$.
Therefore,the correct term for the stem part is $scion$.

(A) Emasculation is a technique used in plant breeding to prevent self-pollination.
It involves the removal of anthers from the bisexual flower bud before they dehisce (release pollen).
This ensures that the female reproductive part (stigma) is available for cross-pollination with pollen from a desired male parent.
Therefore,the correct answer is $A$.