Abstract
The varietal approach to increase production and combat insect attack appeared to be a futile exercise in sorghum. The obvious choice was to shift to hybrid development with the sole aim to exploit hybrid vigour but there too the situation is not very encouraging except the performance of a few hybrids CSH 9, CSH 12R, etc. Others belied the hope and did not show promise. Perhaps, the level of resistance transferred in these genotypes was unable to cope up the intensity of insect attack specially when sorghum plant is attacked by a number of key pests at different growth stages. The situation became even more worse due to overlapping generations of these pests. In addition, resistant × resistant, and resistant × susceptible crosses did not exhibit an improvement over parents indicating no diversity among resistant lines. All these shortcomings suggested the futility of single cross (temperate × tropical) approach and opened new avenue to develop a different strategy to meet the ensuing challenge through which improvement in level of resistance to shoot fly and stem borer was possible which included crossing intermediate × intermediate resistant crosses and subsequently selecting the resistant lines using pedigree method.
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Claims 6
Claim · model-written summary
The varietal approach did not improve production or control insect attack in sorghum.
SorghumOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The varietal approach to increase production and combat insect attack appeared to be a futile exercise in sorghum”
Claim · model-written summary
Only a few hybrids, including CSH 9 and CSH 12R, performed encouragingly.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the situation is not very encouraging except the performance of a few hybrids CSH 9, CSH 12R”
t0“sorghum”
Claim · model-written summary
Other hybrids did not show promise.
- Outcome
- did not show promisee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Others belied the hope and did not show promise”
t0“sorghum”
Claim · model-written summary
Resistant-by-resistant crosses did not improve over parents.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistant × resistant, and resistant × susceptible crosses did not exhibit an improvement over parents”
t0“sorghum”
Claim · model-written summary
Resistant-by-susceptible crosses did not improve over parents.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“resistant × resistant, and resistant × susceptible crosses did not exhibit an improvement over parents”
t0“sorghum”
Claim · model-written summary
The authors recommend intermediate-by-intermediate crosses followed by pedigree selection for resistance.
- Outcome
- crossing intermediate × intermediate resistant crosses and subsequently selecting the resistant lines using pedigree methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“crossing intermediate × intermediate resistant crosses and subsequently selecting the resistant lines using pedigree method”
t0“sorghum”