Abstract
Abstract The potential for selecting favorable early maturing Virginia peanut (Arachis hypogaea L.) lines from advanced generations following a cross between an early maturing Spanish (ssp. fastigiata var. vulgaris) and a large fruited Virginia type (ssp. hypogaea var. hypogaea) was evaluated. Variability, broad and narrow-sense heritability and phenotypic and genetic correlations were estimated for the parents and 39 progeny lines in F5 and F6 generation grown over four location-year environments. Substantial variability among the progenies was observed for yield, seed weight/20 fruits, meat content and protein content while less variability was observed for fruit length, 20-fruit weight, oil content and a maturity index. Heritability estimates obtained from variance component analysis and parent-offspring regression were highest for yield, meat content and protein content; intermediate for fruit length, 20-fruit weight, seed weight/20 fruits; and lowest for oil content and a maturity index. Genotypic correlations generally were higher than phenotypic correlations. Low phenotypic correlations for the maturity index with yield and yield components suggested the possible recovery of favorable recombinants with early maturity and high yields. Fruit size was highly correlated with seed weight and both were significantly correlated with yield suggesting that selection for large fruit in this population would result in higher yield. Correlations between protein content and yield were low. Oil content was negatively correlated with yield indicating improvement in oil content could result in lower yield. Calculation of the relative efficiency of selection among traits indicated that (a) selection for yield components was not as effective as selection for yield itself, and (b) selection for yield could also increase protein content, several fruit and seed traits but would decrease meat and oil content. Transgressive segregation was observed for all traits studied. Progeny means for all traits were distributed nearer the spanish parent than the virginia parent. However, a few favorable recombinants with early maturity, high yields and large fruits were observed among the progenies.
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Claims 17
Claim · model-written summary
Progenies varied substantially for yield, seed weight, meat and protein content.
- Taxon
- peanut
Arachis hypogaeat0 - Outcome
- variability among the progeniese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Substantial variability among the progenies was observed for yield, seed weight/20 fruits, meat content and protein content”
t0“Peanut”
Claim · model-written summary
Progenies varied less for fruit length, fruit weight, oil content and maturity index.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- less variabilitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“less variability was observed for fruit length, 20-fruit weight, oil content and a maturity index”
t0“Peanut”
Claim · model-written summary
Heritability was highest for yield, meat and protein content.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Heritability estimatese0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heritability estimates obtained from variance component analysis and parent-offspring regression were highest for yield, meat content and protein content”
t0“Peanut”
Claim · model-written summary
Heritability was intermediate for fruit length, fruit weight and seed weight.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Heritability estimatese1
- Direction
- intermediatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“intermediate for fruit length, 20-fruit weight, seed weight/20 fruits”
t0“Peanut”
e1“Heritability estimates obtained from variance component analysis”
Claim · model-written summary
Heritability was lowest for oil content and maturity index.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Heritability estimatese1
- Direction
- loweste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“lowest for oil content and a maturity index”
t0“Peanut”
e1“Heritability estimates obtained from variance component analysis”
Claim · model-written summary
Genotypic correlations were generally higher than phenotypic correlations.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Genotypic correlationse0
- Direction
- highere0
- Comparator
- phenotypic correlationse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Genotypic correlations generally were higher than phenotypic correlations”
t0“Peanut”
Claim · model-written summary
Maturity index showed low phenotypic correlations with yield and yield components.
- Taxon
- peanutArachis hypogaeat0
- Material
- maturity indexe0
- Outcome
- phenotypic correlationse0
- Direction
- Lowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Low phenotypic correlations for the maturity index with yield and yield components”
t0“Peanut”
Claim · model-written summary
Fruit size was highly correlated with seed weight.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Fruit sizee0
- Direction
- highly correlatede0
- Comparator
- seed weighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fruit size was highly correlated with seed weight”
t0“Peanut”
Claim · model-written summary
Fruit size and seed weight were significantly correlated with yield.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- yielde0
- Direction
- correlatede0
- Comparator
- Fruit sizee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both were significantly correlated with yield”
t0“Peanut”
e1“Fruit size was highly correlated with seed weight”
Claim · model-written summary
Protein content and yield correlations were low.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Correlations between protein content and yielde0
- Direction
- lowe0
- Comparator
- protein contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Correlations between protein content and yield were low”
t0“Peanut”
Claim · model-written summary
Oil content was negatively correlated with yield.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- yielde0
- Direction
- negatively correlatede0
- Comparator
- Oil contente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oil content was negatively correlated with yield”
t0“Peanut”
Claim · model-written summary
Selecting yield components was less effective than selecting yield directly.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- not as effectivee0
- Direction
- not as effectivee0
- Comparator
- selection for yield itselfe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection for yield components was not as effective as selection for yield itself”
t0“Peanut”
Claim · model-written summary
Selection for yield could increase protein content and fruit and seed traits.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- protein content, several fruit and seed traitse0
- Direction
- increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“selection for yield could also increase protein content, several fruit and seed traits”
t0“Peanut”
Claim · model-written summary
Selection for yield could decrease meat and oil content.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- meat and oil contente0
- Direction
- decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but would decrease meat and oil content”
t0“Peanut”
Claim · model-written summary
Transgressive segregation occurred across all studied traits.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Transgressive segregatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transgressive segregation was observed for all traits studied”
t0“Peanut”
Claim · model-written summary
Progeny trait means were closer to the Spanish than the Virginia parent.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- Progeny meanse0
- Direction
- nearere0
- Comparator
- virginia parente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Progeny means for all traits were distributed nearer the spanish parent than the virginia parent”
t0“Peanut”
Claim · model-written summary
Some progeny combined early maturity, high yield and large fruit.
- Taxon
- peanutArachis hypogaeat0
- Outcome
- favorable recombinants with early maturity, high yields and large fruitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a few favorable recombinants with early maturity, high yields and large fruits were observed among the progenies”
t0“Peanut”