scholarly journals Heterosis for Horticultural Traits in Broccoli

HortScience ◽  
2006 ◽  
Vol 41 (4) ◽  
pp. 990C-990
Author(s):  
Anna L. Hale ◽  
Mark W. Farnham
Keyword(s):  
Brassica Oleracea ◽  
Plant Height ◽  
Inbred Lines ◽  
Stem Diameter ◽  
Hybrid Vigor ◽  
Plant Vigor ◽  
Horticultural Traits ◽  
Predominant Type ◽  
Head Weight ◽  
Almost All

Over the last 3 decades, broccoli (Brassica oleracea L., Italica Group) hybrids made by crossing two inbred lines replaced open-pollinated populations to become the predominant type of cultivar. The change to hybrids evolved with little or no understanding of heterosis or hybrid vigor in this crop. Therefore, the purpose of the present study was to determine levels of heterosis expressed by a set of hybrids derived by crossing relatively elite, modern inbreds (n = 9). A total of 36 hybrids formed by crossing nine parents were evaluated for horticultural characters, including head weight, head stem diameter, plant height, plant width (in a row), and maturity (e.g., days from transplant to harvest) in four environments. When averaged across all four environments, roughly half of the hybrids exhibited high parent heterosis for head weight (1 to 30 g) and stem diameter (0.2 to 3.5 cm). Almost all hybrids showed high parent heterosis for plant height (1 to 10 cm) and width (2 to 13 cm). Unlike other traits, there was negative heterosis for maturity, indicating that heterosis for this character in hybrids is expressed as earliness. With modern broccoli inbreds, heterosis for head characteristics appears less important than for traits that measure plant vigor.

scholarly journals Inheritance of Internode Length and its Relation to Head Exsertion and Head Size in Broccoli

1995 ◽  
Vol 120 (2) ◽  
pp. 292-296 ◽  
Author(s):  
James R. Baggett ◽  
Deborah Kean ◽  
Kathryn Kasimor
Keyword(s):  
Plant Height ◽  
Inbred Lines ◽  
Internode Length ◽  
Hybrid Vigor ◽  
Principal Characteristic ◽  
Parent Plant ◽  
Head Weight ◽  
Total Plant ◽  
High Head ◽  
Selection For

Broccoli (Brassica oleracea L. Italica Group) lines with heads borne above the foliage (exserted) favorably for mechanical harvest were crossed with inbred lines with nonexserted heads. Length of the heads, defined as the portion of the plant above the highest major leaf, was ≈50% of the total plant height in short and tall parents and all plants of the F1, F2, and backcross generations. The principal characteristic identified with good head exsertion was long internodes. Internode length was inherited mostly in an additive manner, with some effect of hybrid vigor apparent in the F1, F2, and backcross to the tall parent. Plant height was also inherited in an additive manner. Head weight in the high-exsertion parent was much lower than in the low-exsertion parent. Within each parent and the F1, head weight was greater in plants with longer internodes and greater plant height. In the segregating generations (F2 and backcross), head weight increased with decreasing internode length, indicating that selection for high head exsertion would result in smaller heads and reduced yield.

scholarly journals Line×tester analysis in lilium×formolongi: identification of superior parents for growth and flowering traits

2019 ◽  
Vol 17 (1) ◽  
pp. 175-187
Author(s):  
R Rai ◽  
J Shrestha ◽  
JH Kim
Keyword(s):  
Plant Height ◽  
Gene Action ◽  
Block Design ◽  
Leaf Length ◽  
Stem Diameter ◽  
Leaf Width ◽  
Days To Flowering ◽  
Flower Diameter ◽  
Number Of Leaves ◽  
Almost All

An experiment was carried out using eight double cross F1s (DCF1s) as lines and two testers to obtain sixteen Line ×Tester hybrids for the evaluation of major growth and flowering traits thereby to understand the breeding potentiality of the parental lines. The performance of growth and flowering traits of all twenty-six genotypes were evaluated in a randomized complete block design (RCBD) with three replications. The analysis of variance (ANOVA) showed all the genotypes were significantly different for all agro-morphological traits under study. The estimated general combining ability (GCA) effects showed that parent 5(P5), were superior for plant height, stem diameter, number of leaves, leaf length, days to flowering and attitude of floral axis followed by parent 2(P2) for leaf length, leaf width, days to flowering and attitude of floral axis and parent7 (P7) for number of flower, flower diameter, bud length and attitude for floral axis. Likewise; tester 1 found to be best combiner with significant GCA effect for almost all growth and flowering traits (except number of leaves). The plant height, leaf width, number of flower and attitude of floral axis showed prevailing additive gene action while stem diameter, number of leaves, leaf length, days to flowering, flower diameter and bud length indicated predominance of dominance gene action. We can conclude that parent P5, parent P2 and parent P7 can be used as good mother lines and the tester 1, as good donor for the seed production. SAARC J. Agri., 17(1): 175-187 (2019)

scholarly journals Inbreeding in sugarcane varieties

2011 ◽  
Vol 41 (4) ◽  
pp. 580-586 ◽  
Author(s):  
Marcelo de Almeida Silva ◽  
Paulo de Souza Gonçalves
Keyword(s):  
Inbreeding Depression ◽  
First Generation ◽  
Inbred Lines ◽  
Hybrid Vigor ◽  
Soluble Solids ◽  
Yield Traits ◽  
Plant Vigor ◽  
Sugarcane Varieties ◽  
Stalk Diameter ◽  
Stalk Weight

Sugarcane species are allogamous, i.e. selfing is expected to reduce plant vigor. This study was undertaken to obtain and evaluate first-generation inbred lines that may be used for further crosses and determine the extent of inbreeding depression in sugarcane. In this research, 26 parental varieties were self-pollinated to obtain about 19,000 seedlings. Results showed that it is possible to segregate different traits in a given variety and find lines with promising outcome for all assessed characteristics. The soluble solids segregation observed in low and even high-Brix varieties increases the possibility of quick improvement in this trait. Self-pollination did not produce a general loss in yield traits such as soluble solids, stalk number and stalk diameter in any of the 26 varieties, but both stalk height and stalk weight showed strong inbreeding depression. Selfing-derived clones can be used to produce hybrid vigor in crossings.

scholarly journals Impact of parent inbred lines on heterosis expression for agronomic characteristics in sunflower

2020 ◽  
Vol 56 (No. 3) ◽  
pp. 123-132
Author(s):  
Assadollah Zakeri Haddadan ◽  
Mehdi Ghaffari ◽  
Eslam Majidi Hervan ◽  
Bahram Alizadeh
Keyword(s):  
Plant Height ◽  
Block Design ◽  
Inbred Lines ◽  
Stem Diameter ◽  
Oil Yield ◽  
Relative Impact ◽  
Head Diameter ◽  
Days To Flowering ◽  
Agronomic Characteristics ◽  
The Impact

To study the impact of parent-inbred lines on the heterosis expression of the agronomic characteristics in sunflower hybrids, 24 sunflower hybrids along with the parent lines were evaluated for their agronomic characteristics as a randomised complete block design with three replications in the 2018–2019 growing seasons in Karaj, Iran. According to the results, the hybrids R29 × A346, R19 × A346, R29 × A40 had the highest achene yield (4 159, 4 143 and 4 108 kg/ha, respectively), but the highest heterosis was observed in R29 × A212 and R19 × A212 (182 and 181%, respectively) suggesting that the incidence of heterosis is related to the relative performance of both the parents and hybrids. The results confirmed the heterosis expression for most of the agronomic traits. The heterosis for the days to flowering and maturity were negative. All the mid-parent heterosis (MPH) for the plant height, head diameter, stem diameter and achene number were positive, while only the plant height was positive for the best parent heterosis (BPH). Almost all the MPH and BPH of the crosses for the achene and oil yield were positive, which indicates a considerable heterosis for the achene and oil yield. The results showed that the relative impact of the restorer (R)-lines was higher than the cytoplasmic mail sterile (CMS)-lines on the heterosis expression for the days to maturity, stem diameter, achene number per head and achene and oil yield. The CMS-lines had more of an impact on the heterosis expression for the plant height and the relative impact of the R-lines and CMS-lines were almost similar for the days to flowering, head diameter, achene weight and oil content. Due to the higher relative impact of the paternal lines on the heterosis expression for half of the studied characteristics in this study, choosing suitable parental lines will have a crucial role in breeding the sunflowers for a desired trait.

scholarly journals RESPON PEMBERIAN PUPUK AB-MIX DAN BERBAGAI PUPUK ORGANIK CAIR TERHADAP PERTUMBUHAN TANAMAN TERUNG UNGU (Solanum melongena L.) SECARA HIDROPONIK DENGAN SISTEM WICK

2021 ◽  
Vol 8 (2) ◽  
pp. 54
Author(s):  
Deddy Wahyudin Purba ◽  
Jian Maulana
Keyword(s):  
Flowering Time ◽  
Plant Height ◽  
Block Design ◽  
Organic Fertilizer ◽  
Solanum Melongena ◽  
Stem Diameter ◽  
Organic Fertilizers ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Almost All

This study aimed to determine the effect of AB Mix fertilizer and various liquid organic fertilizers on the growth of purple eggplant (Solanum melongena L.) hydroponically with an axis system. The design used was a Randomized Block Design (RAK). While the treatment design is factorial consisted of two factors studied, namely: 1. AB Mix (A) fertilizer consists of 3 levels A1: 500 ppm/plot, A2: 100 ppm/plot, A3: 1500/plot. 2. Various liquid organic fertilizers (C) with a dose of 40 cc/plot: C1 (POC Peel), C2 (POC HANTU),  and C3 (POC Banana Weevil), with three times replications. Parameters observed were plant height (cm), stem diameter (mm), number of leaves (strands), flowering time (days), and number of flowers (days). The results showed that Mixed AB fertilizer has no significant effect on plant height and stem diameter, but significantly affects the number of leaves, flowering time, and the flowers' number. The application of various organic fertilizers did not show a significant effect in almost all parameters except for the flowering time and obtained the best organic fertilizer yield, namely POC Bonggol Pisang (C3). In addition, the interaction of AB Mix fertilizer and various organic fertilizers did not significantly affect all the parameters observed.

scholarly journals Influence of varieties and spacing on growth characters of sprouting broccoli (Brassica oleracea L.)

2021 ◽  
pp. 99-103
Author(s):  
SANJAY KUMAR
Keyword(s):  
Beneficial Effect ◽  
Brassica Oleracea ◽  
Plant Height ◽  
Growth Parameters ◽  
Block Design ◽  
Stem Diameter ◽  
Rabi Season ◽  
Randomized Block Design ◽  
Brassica Oleracea L ◽  
Growth Characters

The investigation was undertaken at B.B.A. University, Lucknow (UP) during rabi season of 2017-18 and 2018-19 to study the influence of varieties and spacing on growth characters of sprouting broccoli (Brassica oleracea L. var. italic Plenck). Four varieties viz. V1- Pusa Broccoli KTS-1, V2-Palam Kanchan , V3-Palam Vichitra , V4-Palam Samridhi and four spacings viz.- S1- 60x45 cm, S2 - 60×30 cm, S3 - 45×45 cm, S4 - 45×30 cm were evaluated in factorial randomized block design with three replications. The results revealed that the variety Pusa Broccoli KTS-1 showed the highest plant height (66.7 and 66.2 cm), stem diameter (3.5 and 3.5 cm),plant spreading (E-W and N-S) (61.3, 62.5 and 54.2, 55.3 cm), leaves per plant (23.7 and 23.9), length of leaves (51.1 and 51.1cm) and width of leaves (30.3 and 30.6 cm). Spacing of 60x45 cm produced significantly highest values of plant height (67.3 and 68.4 cm), stem diameter (3.4 and 3.4 cm), leaves per plant (24.3 and 24.5), length of leaves (51.9 and 52.0 cm) and width of leaves (31.0 and 31.2 cm). The lowest values of these growth characters were recorded under spacing of 45x30 cm. The interaction effect between variety Palam Vichitra and spacing of 60x45 cmshowed significant beneficial effect on growth parameters viz.- plant height (68.3 and 68.8 cm), stem diameter (3.5 and 3.6 cm), plant spreading (E-W and N-S) (64.1 and 68.1 and 54.5 and 55.6 cm), leaves per plant (24.7 and 24.9), length of leaves (52.7 and 52.5 cm) and width of leaves (31.3 and 31.3 cm) in sprouting broccoli.

scholarly journals Two User-Friendly Molecular Markers Developed for the Identification of Hybrid Lethality Genes in Brassica oleracea

Agronomy ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 982
Author(s):  
Zhiliang Xiao ◽  
Congcong Kong ◽  
Fengqing Han ◽  
Limei Yang ◽  
Mu Zhuang ◽  
...  
Keyword(s):  
Molecular Markers ◽  
Brassica Oleracea ◽  
Rapid Identification ◽  
Inbred Lines ◽  
Hybrid Lethality ◽  
Specific Pcr ◽  
Allele Specific ◽  
User Friendly ◽  
Allele Specific Pcr ◽  
Kasp Marker

Cabbage (Brassica oleracea) is an important vegetable crop that is cultivated worldwide. Previously, we reported the identification of two dominant complementary hybrid lethality (HL) genes in cabbage that could result in the death of hybrids. To avoid such losses in the breeding process, we attempted to develop molecular markers to identify HL lines. Among 54 previous mapping markers closely linked to BoHL1 or BoHL2, only six markers for BoHL2 were available in eight cabbage lines (two BoHL1 lines; three BoHL2 lines; three lines without BoHL); however, they were neither universal nor user-friendly in more inbred lines. To develop more accurate markers, these cabbage lines were resequenced at an ~20× depth to obtain more nucleotide variations in the mapping regions. Then, an InDel in BoHL1 and a single-nucleotide polymorphism (SNP) in BoHL2 were identified, and the corresponding InDel marker MBoHL1 and the competitive allele-specific PCR (KASP) marker KBoHL2 were developed and showed 100% accuracy in eight inbred lines. Moreover, we identified 138 cabbage lines using the two markers, among which one inbred line carried BoHL1 and 11 inbred lines carried BoHL2. All of the lethal line genotypes obtained with the two markers matched the phenotype. Two markers were highly reliable for the rapid identification of HL genes in cabbage.

The effects of plant density and fertilizer application on yield components in three marrow-stem kale (Brassica oleracea L.) varieties

1971 ◽  
Vol 77 (1) ◽  
pp. 83-89 ◽  
Author(s):  
T. D. Johnston
Keyword(s):  
Brassica Oleracea ◽  
Plant Height ◽  
Yield Components ◽  
Plant Density ◽  
Fertilizer Application ◽  
Varietal Differences ◽  
Crop Density ◽  
Leaf Yield ◽  
Brassica Oleracea L ◽  
Effects Of Density

SummaryThe effects of crop density and fertilizer application on three varieties of marrowstem kale were investigated. The yield of stem, yield of leaf, components of leaf yield and plant height were studied separately. Varietal differences and effects of density and fertilizer application were significant for all characters, except for the effect of crop density on leaf and stem yield per ha.Significant variety x treatment interactions occurred for a number of the characters measured. The possible importance of these is discussed.

Quantification of glucosinolates, anthocyanins, free amino acids, and vitamin C in inbred lines of cabbage (Brassica oleracea L.)

2014 ◽  
Vol 145 ◽  
pp. 77-85 ◽  
Author(s):  
Suhyoung Park ◽  
Mariadhas Valan Arasu ◽  
Min-Ki Lee ◽  
Jin-Hyuk Chun ◽  
Jeong Min Seo ◽  
...  
Keyword(s):  
Amino Acids ◽  
Vitamin C ◽  
Brassica Oleracea ◽  
Free Amino Acids ◽  
Free Amino ◽  
Inbred Lines ◽  
Brassica Oleracea L

scholarly journals GENETIC DIVERGENCE AND MORPHO-AGRONOMIC PERFORMANCE OF JATROPHA CURCAS L. CLONES FOR SELECTION OF CLONAL VARIETIES

2016 ◽  
Vol 29 (4) ◽  
pp. 841-849
Author(s):  
ADRIANA QUEIROZ DE ALMEIDA ◽  
SIMONE ALVES SILVA ◽  
VANESSA DE OLIVEIRA ALMEIDA ◽  
DEOCLIDES RICARDO DE SOUZA ◽  
GILMARA DE MELO ARAÚJO
Keyword(s):  
Genetic Diversity ◽  
Multivariate Analysis ◽  
Plant Height ◽  
Genetic Divergence ◽  
Morphological Characterization ◽  
Stem Diameter ◽  
Agronomic Performance ◽  
And Performance ◽  
Lower Contribution ◽  
Selection Of

ABSTRACT The knowledge about genetic diversity of jatropha crop is important for genetic conservation resources and breeding of this species. The aim of this study was to evaluate the genetic diversity and performance of jatropha clones through morphological characterization to selection of clonal varieties for biofuels production. The clones were obtained through shoot cuttings from previous selection in a population of half-sibs progenies. The morphoagronomic analyses of clones was carried out at 180 days after transplantation and were evaluated plant height, stem diameter, number of primary branches and number of secondary branches, number of bunches and number of fruits per plant. Evaluating clones performance, significant results were found for the number of secondary branches. About analysis of genetic diversity, the measures of dissimilarity genetic varied from 0.62 to 13.11, this way, the UFRBPR14 and UFRBPR15 clones were more divergent. The Tocher method was efficient to verify formation of four groups. The characteristics that most contributed to the divergence among clones were branches number, height and number of bunches, and, stem diameter had lower contribution. The jatropha clones differed only in the secondary branches number and multivariate analysis showed divergence among the jatropha clones with formation of four groups. Also, branches number, plant height and number of bunches were characteristic that contributed to genetic divergence.

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