Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)

A study was conducted on genetics of shelf life and yield characters of long bean. Four parental lines namely, L30, KU7, KU8 and CSL 1 9 were used in the study. Genetic component analysis for shelf life and yield characters were done following generation mean analysis from four cross combination...

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Main Author:	Rahman, Md. Anisur
Format:	Thesis
Language:	English English
Published:	1997
Subjects:	Plant genetics Beans
Online Access:	http://psasir.upm.edu.my/id/eprint/10402/1/FP_1997_11_A.pdf
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id	my-upm-ir.10402
record_format	uketd_dc
spelling	my-upm-ir.104022011-04-08T01:47:29Z Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw) 1997 Rahman, Md. Anisur A study was conducted on genetics of shelf life and yield characters of long bean. Four parental lines namely, L30, KU7, KU8 and CSL 1 9 were used in the study. Genetic component analysis for shelf life and yield characters were done following generation mean analysis from four cross combinations namely Cross 1 (L30 X KU7), Cross 2 (L30 X KU8), Cross 3 (KU7 X KU8) and Cross 4 (L30 X CSL1 9). F1, F2 and backcross generations were developed. A study was also conducted to transfer genes for long shelf life from a donor parent (L30) to the genetic background of recurrent parent (KU7, KU8, CSL 19) using backcross breeding method. Results of scaling test showed that the additive-dominance model was adequate in explaining the genetic control of seeds per pod, seed weight, pod protein and seed protein in Cross 1; pod protein, seed protein and pod protein yield per plant in Cross 2; and shelf life in Cross 4. This study revealed the importance of dominance gene effects, followed by dominance X dominance (I) interaction effects for shelf life and yield characters. The additive gene effect was proportionately small . Duplicate type of epistasis was observed in most of the characters including shelf l ife. Exploitation of heterosis breeding is suggested for the improvement of these traits having involved with non-additive gene effects. For characters which are under the control of additive (d) and additive X additive (i) gene interactions, simple selection procedu re like pedigree method in the early generation is recommended . The varied estimates of narrow-sense heritability among the crosses for different characters were due to genotype X environment interactions. Estimates of narrow-sense heritability for pod yield per plant and shelf life were high in Crosses 1 and 2, respectively. Shelf life and pod yield manifested high estimates of narrow-sense heritability in Cross 4. The degree of heterosis varied with characters among the crosses, because of diverse geographical origin of the parental lines and the contributions of background genotypes through its interaction with segregating loci. Heterosis estimates were moderately h igh for shelf life and pod yield per plant in Cross 1, and low in Crosses 2, 3 and 4. Days to flower, days to harvest, moisture content and pod length showed negative heterosis among the crosses, indicating earliness of the hybrids, having less moisture content and reduced pod length . Plant genetics Beans 1997 Thesis http://psasir.upm.edu.my/id/eprint/10402/ http://psasir.upm.edu.my/id/eprint/10402/1/FP_1997_11_A.pdf application/pdf en public phd doctoral Universiti Putra Malaysia Plant genetics Beans Faculty of Agriculture English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Plant genetics Beans
spellingShingle	Plant genetics Beans Rahman, Md. Anisur Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
description	A study was conducted on genetics of shelf life and yield characters of long bean. Four parental lines namely, L30, KU7, KU8 and CSL 1 9 were used in the study. Genetic component analysis for shelf life and yield characters were done following generation mean analysis from four cross combinations namely Cross 1 (L30 X KU7), Cross 2 (L30 X KU8), Cross 3 (KU7 X KU8) and Cross 4 (L30 X CSL1 9). F1, F2 and backcross generations were developed. A study was also conducted to transfer genes for long shelf life from a donor parent (L30) to the genetic background of recurrent parent (KU7, KU8, CSL 19) using backcross breeding method. Results of scaling test showed that the additive-dominance model was adequate in explaining the genetic control of seeds per pod, seed weight, pod protein and seed protein in Cross 1; pod protein, seed protein and pod protein yield per plant in Cross 2; and shelf life in Cross 4. This study revealed the importance of dominance gene effects, followed by dominance X dominance (I) interaction effects for shelf life and yield characters. The additive gene effect was proportionately small . Duplicate type of epistasis was observed in most of the characters including shelf l ife. Exploitation of heterosis breeding is suggested for the improvement of these traits having involved with non-additive gene effects. For characters which are under the control of additive (d) and additive X additive (i) gene interactions, simple selection procedu re like pedigree method in the early generation is recommended . The varied estimates of narrow-sense heritability among the crosses for different characters were due to genotype X environment interactions. Estimates of narrow-sense heritability for pod yield per plant and shelf life were high in Crosses 1 and 2, respectively. Shelf life and pod yield manifested high estimates of narrow-sense heritability in Cross 4. The degree of heterosis varied with characters among the crosses, because of diverse geographical origin of the parental lines and the contributions of background genotypes through its interaction with segregating loci. Heterosis estimates were moderately h igh for shelf life and pod yield per plant in Cross 1, and low in Crosses 2, 3 and 4. Days to flower, days to harvest, moisture content and pod length showed negative heterosis among the crosses, indicating earliness of the hybrids, having less moisture content and reduced pod length .
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Rahman, Md. Anisur
author_facet	Rahman, Md. Anisur
author_sort	Rahman, Md. Anisur
title	Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
title_short	Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
title_full	Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
title_fullStr	Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
title_full_unstemmed	Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)
title_sort	genetic studies and backcross breeding for shelf life and yield in long bean (vigna sesquipedalis (l.) fruw)
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Agriculture
publishDate	1997
url	http://psasir.upm.edu.my/id/eprint/10402/1/FP_1997_11_A.pdf
_version_	1747811113776447488

Genetic Studies and Backcross Breeding for Shelf Life and Yield in Long Bean (Vigna Sesquipedalis (L.) Fruw)

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