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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
10/01/2010 |
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Data da última atualização: |
25/09/2013 |
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Autoria: |
YU, S.; WEI, X.; XIA, Q.; LUO, Y. |
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Afiliação: |
Laboratory of Wheat Varieties, Nanjing Agricultural College, Nanjing. |
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Título: |
A preliminary study on the hereditary variations of yield components and plant height of high-yielding wheat varieties grown in the Lower Yangtse Valley. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Scientia Agricultura Sinica, Beijing, n. 4, p. 13-19, 1982. |
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Idioma: |
Inglês |
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Conteúdo: |
Seven high-yielding varieties of wheat (Triticurn aestivum L. ) grown in the Lower Yangtse Valley were used in this study to investigate the hereditary variations of four yield component characters and plant height. Four row plot with 4 replications in a dibble seeding were studied to determine the genetic variation coefficients (GCV), broadsense hereditabilities, relative genetic advances(GS'),genotypio correlations and selection indexes.The broad-sense hereditability estimates are high for plant height and number of grains per spike, moderate for spikes per plant, and low for weight of 1,000 kernels and grain yield per plant. The GCV are higher for spikes per plant, moderate for the number of grains per spike, and low for plant height. Since the hereditability estimates and GCV for spikes per plant and the number of grains per spike were higher, single plant selection on these two characters from the 7 varietal populations would be effectual.The magnitude of relative genetic advance predicated by the population of 7 wheat varieties showed that the spikes per plant had higher GS',number of grains pet spike and grain yield per plant had median GS', the weight of 1,000 kernels and plant height had lower GS'. The number of grains per spike was positively and significantly correlated with grain yield per plant. Weight of 1,000 kernels was negativly and significantly correlated with the spikes per plant.The genotypic and phenotypic variances and covariances entering into the computation of the correlations were used to illustrate the construction of selection indexes in wheat. Various selection indexes were constructed and the expected genetic advance from the use of each was determined. The relative efficiency from the use of the various selection indexes compared with selection for single plant grain yield alone.The efficiency of selection index for single plant yield with single correlated character was not high enough, but with two or more characters included the efficiency was well raised. When a selection index includes the single plant yield itself and other correlated characters,its efficiency is better than that without the single plant yield. MenosSeven high-yielding varieties of wheat (Triticurn aestivum L. ) grown in the Lower Yangtse Valley were used in this study to investigate the hereditary variations of four yield component characters and plant height. Four row plot with 4 replications in a dibble seeding were studied to determine the genetic variation coefficients (GCV), broadsense hereditabilities, relative genetic advances(GS'),genotypio correlations and selection indexes.The broad-sense hereditability estimates are high for plant height and number of grains per spike, moderate for spikes per plant, and low for weight of 1,000 kernels and grain yield per plant. The GCV are higher for spikes per plant, moderate for the number of grains per spike, and low for plant height. Since the hereditability estimates and GCV for spikes per plant and the number of grains per spike were higher, single plant selection on these two characters from the 7 varietal populations would be effectual.The magnitude of relative genetic advance predicated by the population of 7 wheat varieties showed that the spikes per plant had higher GS',number of grains pet spike and grain yield per plant had median GS', the weight of 1,000 kernels and plant height had lower GS'. The number of grains per spike was positively and significantly correlated with grain yield per plant. Weight of 1,000 kernels was negativly and significantly correlated with the spikes per plant.The genotypic and phenotypic variances and covariances entering into the com... Mostrar Tudo |
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Palavras-Chave: |
Interações. |
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Thesagro: |
Rendimento; Trigo. |
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Thesaurus Nal: |
China. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02787naa a2200205 a 4500
001 1835540
005 2013-09-25
008 1982 bl --- 0-- u #d
100 1 $aYU, S.
245 $aA preliminary study on the hereditary variations of yield components and plant height of high-yielding wheat varieties grown in the Lower Yangtse Valley.
260 $c1982
520 $aSeven high-yielding varieties of wheat (Triticurn aestivum L. ) grown in the Lower Yangtse Valley were used in this study to investigate the hereditary variations of four yield component characters and plant height. Four row plot with 4 replications in a dibble seeding were studied to determine the genetic variation coefficients (GCV), broadsense hereditabilities, relative genetic advances(GS'),genotypio correlations and selection indexes.The broad-sense hereditability estimates are high for plant height and number of grains per spike, moderate for spikes per plant, and low for weight of 1,000 kernels and grain yield per plant. The GCV are higher for spikes per plant, moderate for the number of grains per spike, and low for plant height. Since the hereditability estimates and GCV for spikes per plant and the number of grains per spike were higher, single plant selection on these two characters from the 7 varietal populations would be effectual.The magnitude of relative genetic advance predicated by the population of 7 wheat varieties showed that the spikes per plant had higher GS',number of grains pet spike and grain yield per plant had median GS', the weight of 1,000 kernels and plant height had lower GS'. The number of grains per spike was positively and significantly correlated with grain yield per plant. Weight of 1,000 kernels was negativly and significantly correlated with the spikes per plant.The genotypic and phenotypic variances and covariances entering into the computation of the correlations were used to illustrate the construction of selection indexes in wheat. Various selection indexes were constructed and the expected genetic advance from the use of each was determined. The relative efficiency from the use of the various selection indexes compared with selection for single plant grain yield alone.The efficiency of selection index for single plant yield with single correlated character was not high enough, but with two or more characters included the efficiency was well raised. When a selection index includes the single plant yield itself and other correlated characters,its efficiency is better than that without the single plant yield.
650 $aChina
650 $aRendimento
650 $aTrigo
653 $aInterações
700 1 $aWEI, X.
700 1 $aXIA, Q.
700 1 $aLUO, Y.
773 $tScientia Agricultura Sinica, Beijing$gn. 4, p. 13-19, 1982.
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Embrapa Trigo (CNPT) |
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