Abstract
Adoption of modem agricultural technology vis-a-vis, the introduction of new high yielding exotic varieties has largely endangered the rice genetic diversity that got adapted to the temperate environments of Kashmir since their first domestication. This germplasm resource is diverse in morphology, grain characteristics, quality parameters, maturity period and response to biotic/abiotic stresses. Sixty six indigenous rice cultivars adapted to agro-climatic conditions of Kashmir were collected, evaluated under different micro-and macroenvironments and characterized for morphological, maturity, yield, yield component traits, and quality parameters. Most of these cultivars got grouped into cold-tolerant Indica rice, with a few under Japonica rice. Most of the cultivars possessed genes for quality rice, better recovery of milled rice and higher head rice recovery, but, by and large, were poor yielders despite vigorous growth, usually medium in tillering and with lesser grains panicle-1. Presence of high G x E interaction revealed that minor genes and modifying factors have played a significant role during adaptation to a particular macro-environment. Genotypic coefficient of variation was high for grain yield plot-1, moderate for tillers plant-1, grains panicle-1, 1000-grain weight, amylose content and gelatinization temperature and low for maturity traits, plant height, head rice recovery, milled rice recovery and amylose content. The grains of all these cultivars are bold and sticky on cooking. Significant variation in grain colour (blackish brown and creamy white) and aroma exists revealing constellation of elite allelic resources in this set of germplasm.
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Claims 11
Claim · model-written summary
Most indigenous Kashmir rice cultivars grouped into cold-tolerant Indica rice, with a few Japonica.
- Taxon
- rice
Oryza sativat0 - Outcome
- grouped into cold-tolerant Indica ricee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e1“Most of these cultivars got grouped into cold-tolerant Indica rice, with a few under Japonica rice”
Claim · model-written summary
Most cultivars had better milled rice recovery and higher head rice recovery.
- Taxon
- riceOryza sativat0
- Outcome
- head rice recoverye2
- Direction
- highere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e2“Most of the cultivars possessed genes for quality rice, better recovery of milled rice and higher head rice recovery”
Claim · model-written summary
Most cultivars were poor yielders despite vigorous growth.
- Taxon
- riceOryza sativat0
- Outcome
- yielderse3
- Direction
- poore3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e3“were poor yielders despite vigorous growth”
Claim · model-written summary
Most cultivars were usually medium in tillering and had fewer grains per panicle.
- Taxon
- riceOryza sativat0
- Outcome
- grains panicle-1e4
- Direction
- lessere4
- Qualifier
- medium in tilleringe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e4“usually medium in tillering and with lesser grains panicle-1”
Claim · model-written summary
High genotype by environment interaction indicates that minor genes and modifying factors played a significant role in adaptation to a particular macro-environment.
- Taxon
- riceOryza sativat0
- Outcome
- adaptation to a particular macro-environmente5
- Qualifier
- minor genes and modifying factorse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e5“Presence of high G x E interaction revealed that minor genes and modifying factors have played a significant role during adaptation to a particular macro-environment”
Claim · model-written summary
Genotypic coefficient of variation was high for grain yield per plot.
- Taxon
- riceOryza sativat0
- Outcome
- Genotypic coefficient of variatione6
- Direction
- highe6
- Qualifier
- grain yield plot-1e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e6“Genotypic coefficient of variation was high for grain yield plot-1”
Claim · model-written summary
Genotypic coefficient of variation was moderate for tillers per plant, grains per panicle and 1000-grain weight.
- Taxon
- riceOryza sativat0
- Outcome
- Genotypic coefficient of variatione6
- Direction
- moderatee7
- Qualifier
- tillers plant-1, grains panicle-1, 1000-grain weighte7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e6“Genotypic coefficient of variation was high for grain yield plot-1”
e7“moderate for tillers plant-1, grains panicle-1, 1000-grain weight”
Claim · model-written summary
Genotypic coefficient of variation was moderate for amylose content and gelatinization temperature.
- Taxon
- riceOryza sativat0
- Outcome
- Genotypic coefficient of variatione6
- Direction
- moderatee7
- Qualifier
- amylose content and gelatinization temperaturee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e6“Genotypic coefficient of variation was high for grain yield plot-1”
e7“moderate for tillers plant-1, grains panicle-1, 1000-grain weight, amylose content and gelatinization temperature”
Claim · model-written summary
Genotypic coefficient of variation was low for maturity traits, plant height and head rice recovery.
- Taxon
- riceOryza sativat0
- Outcome
- Genotypic coefficient of variatione6
- Direction
- lowe7
- Qualifier
- maturity traits, plant height, head rice recoverye7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e6“Genotypic coefficient of variation was high for grain yield plot-1”
e7“low for maturity traits, plant height, head rice recovery, milled rice recovery and amylose content”
Claim · model-written summary
Genotypic coefficient of variation was low for milled rice recovery and amylose content.
- Taxon
- riceOryza sativat0
- Outcome
- Genotypic coefficient of variatione6
- Direction
- lowe7
- Qualifier
- milled rice recovery and amylose contente7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e6“Genotypic coefficient of variation was high for grain yield plot-1”
e7“low for maturity traits, plant height, head rice recovery, milled rice recovery and amylose content”
Claim · model-written summary
Significant variation in grain colour and aroma exists among the indigenous rice cultivars.
- Taxon
- riceOryza sativat0
- Outcome
- grain coloure1
- Qualifier
- blackish brown and creamy whitee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“indigenous rice germplasm”
e1“Significant variation in grain colour (blackish brown and creamy white) and aroma exists”