the proper isolation distance for maintenance breeding of male sterility line A*B in hybrid
A.100
B.200
C.400
D.500
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Crossing technique : Manual emasculation by detasseling
Detasseling : Removal of male inflorescence from the monoecious crop
Time for detasseling : The time taken for shedding of pollen from the tassel in 1-2 days after emergence. Hence the tassel should be removed before the shedding of pollen.
Detasseling
Detasseling is the removal of tassel from female parent. Detasseling is done when the tassel emerged out of the boot leaf, but before anthesis have shed pollen. Anthers take 2-4 days to dehisce after complete emergence. Only in few cases, the anthers start dehisce before its complete emergence. In such case detasseling should be done earlier. Detasseling is done every day from the emergence of tassel upto 14 days.
Method
Hold the stem below the boot leaf in left hand and the base of the basal in right hand and pull it out in a single pull.
Grasp entire tassel so that all the pollen parts are fully removed.
Do not break or remove leaves as removal will reduce yields and will result in lower quality of seed.

Precautions to be adopted during detasseling
No part should be left on the plant as it causes contamination.
It should be uniform process done daily in the morning in a particular direction.
Donot break the top leaves as the field may be reduced due to the earning of source material to accumulate in sink [seed ] as removal of 1 leaf course 1.5% loss 2 leaves 5.9% loss and 3 leaves 14% loss in yield.
Detassel only after the entire tassel has come out and immature detasseling may lead to reduced yield and contamination.
Mark the male rows with marker to avoid mistake in detasseling
Look out for shedders [shedding tassel] in female rows as the may cause contamination.
After pulling out the tassel drop it there itself and bury in soil. Otherwise late emerging pollen from detasseled tassel may cause contamination.
Do not carry the tassel through the field as any fall of pollen may lead to contamination.
Donot practice, improper, immature and incomplete detasseling.
Improper detasseling: A portion of the tassel is remaining in the plant while detasseling.
Immature detasseling: Carrying out detasseling work when the tassel is within the leaves.
Incomplete detasseling: The tassel is remaining in lower or unseen or unaccounted in within the whole of leaves.
There should not be any shedding tassel.
Shedding tassel: Either full or part of tassel remain in female line after detasseling and shedding pollen which may contaminate the genetic purity of the crop.
Detasseling : Removal of male inflorescence from the monoecious crop
Time for detasseling : The time taken for shedding of pollen from the tassel in 1-2 days after emergence. Hence the tassel should be removed before the shedding of pollen.
Detasseling
Detasseling is the removal of tassel from female parent. Detasseling is done when the tassel emerged out of the boot leaf, but before anthesis have shed pollen. Anthers take 2-4 days to dehisce after complete emergence. Only in few cases, the anthers start dehisce before its complete emergence. In such case detasseling should be done earlier. Detasseling is done every day from the emergence of tassel upto 14 days.
Method
Hold the stem below the boot leaf in left hand and the base of the basal in right hand and pull it out in a single pull.
Grasp entire tassel so that all the pollen parts are fully removed.
Do not break or remove leaves as removal will reduce yields and will result in lower quality of seed.

Precautions to be adopted during detasseling
No part should be left on the plant as it causes contamination.
It should be uniform process done daily in the morning in a particular direction.
Donot break the top leaves as the field may be reduced due to the earning of source material to accumulate in sink [seed ] as removal of 1 leaf course 1.5% loss 2 leaves 5.9% loss and 3 leaves 14% loss in yield.
Detassel only after the entire tassel has come out and immature detasseling may lead to reduced yield and contamination.
Mark the male rows with marker to avoid mistake in detasseling
Look out for shedders [shedding tassel] in female rows as the may cause contamination.
After pulling out the tassel drop it there itself and bury in soil. Otherwise late emerging pollen from detasseled tassel may cause contamination.
Do not carry the tassel through the field as any fall of pollen may lead to contamination.
Donot practice, improper, immature and incomplete detasseling.
Improper detasseling: A portion of the tassel is remaining in the plant while detasseling.
Immature detasseling: Carrying out detasseling work when the tassel is within the leaves.
Incomplete detasseling: The tassel is remaining in lower or unseen or unaccounted in within the whole of leaves.
There should not be any shedding tassel.
Shedding tassel: Either full or part of tassel remain in female line after detasseling and shedding pollen which may contaminate the genetic purity of the crop.
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sorry..............................................................................idont no ans
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