Maturity Groups (original) (raw)
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Genetika, 2012
In this paper we studied the variability and correlation of cabbage traits in different maturity groups. The study included early spring cabbages (planted in early spring, harvested in early summer) and autumn cabbages (planted in mid-summer, harvested in late autumn). Using coefficients of variation and correlation coefficients, we analyzed 17 cabbage traits in 35 commercially grown cultivars, F1 hybrids, and experimental F1 hybrids. The traits were analyzed separately for each maturity group. In the early cabbages, the coefficients of variation ranged from 4.8 to 44.2%. The calculated correlation coefficients differed between the two maturity groups. The early cabbages had 26 significant positive correlations. The positive correlations calculated among different traits of early cabbages defined this group fully and made it distinct from the late-maturing genotypes. Plant height and rosette diameter in the early genotypes were highly positively correlated with rosette weight, whole...
Acta Horticulturae, 2012
In this paper we studied the variability and correlation of agronomic traits in early maturity cabbages. The study included early spring cabbages (planted in early spring, harvested in early summer). Using coefficients of variation and correlation coefficients, we analyzed 17 agronomic traits in 20 commercially grown cultivars, F 1 hybrids, and experimental F 1 hybrids. In the early cabbages, the coefficients of variation ranged from 4.8 to 44.2%. The early cabbages had 26 significant positive correlations. Plant height and plant diameter in the early genotypes were highly positively correlated with total weight of developed leaves, total weight of plant, total weight of head, usable portion of head, head length, and head diameter. Plant height and plant diameter participate in the formation of active photosynthetic area in early cabbages. Plant diameter in these genotypes provides a greater influx of light and heat, which results in greater total weight of head. Also, in early cabbages that have greater plant height, the leaf rosette will not lie on the cold surface of the ground in the spring. The activity of the cabbage plant is thus more focused towards the formation of larger total weight of head.
This research was conducted to determine the interrelationships between yield and some yield components, and direct and indirect effects of such components on yield in cabbage (Brassica oleracea var. capitata L.). The experiment was carried out in a randomized complete block design with three replications using fourteen inbred lines of cabbage in Samsun, Turkey during 2011–2012. Correlation and path coefficient analysis were performed on 11 economic traits such as plant height, plant diameter, width of outer leaf, length of outer leaf, head weight, head diameter, head length, core length, diameter of interior stem, days to maturity and yield. A wide range of variation was observed among the cabbage genotypes for all the traits. It was found that all of the yield components except days to maturity and core length had highly significant and positive correlations with yield. The highest significant positive correlation was obtained between yield and head weight (r = 0.927**). Path coefficient analysis indicated that head weight (0.7139, 56.81%) had the highest positive direct effect on yield followed by head length (0.2265, 23.82%) and plant diameter (0.1907, 16.59%). As a result, head weight, head length, plant diameter, plant height, width of outer leaf, length of outer leaf, head diameter and diameter of interior stem could be effectively used as selection criteria in the breeding programme of cabbage varieties with high yielding, because these traits were the most important yield components affecting yield in cabbage
HortScience: a publication of the American Society for Horticultural Science
This is the second of two related reports dealing with the effects of cultivar × environment interactions on cabbage (Brassica oleracea L., Capitata Group) crop traits. This study examined planting date and cultivar effects on physical head traits of process-ing cabbage and compared these findings to those from a similar study of fresh market cabbage. Six cultivars of processing cabbage were planted in May and June–July of 1999 and 2000 at the OARDC Vegetable Crops Research Branch in Fremont, Ohio. Market-able yield for each crop was determined, and measurements were taken of head weight, diameter, density, and volume, and core length, base width, and volume on more than 450 individual heads. Head and core volume and head density were calculated from these direct measures. Year, planting date, and cultivar significantly affected the majority of head traits. May planting led to higher marketable yield and heavier heads with larger diameters than June–July planting. The most variable ...
Quantitative variation in cold climate adapted white cabbage (Brassica oleracea L. var. capitata)
Hereditas, 2008
The variation in growth period, mean head weight, and some form related characters was analysed in a cabbage breeding population. For all of the characters except growth period, the additive component of the variation was highly significant. Though not significant because of large interactions, the variation in growth period was due to additive as well as dominant gene actions. Dominance variance was of little importance for the other characters. A significant genotype by environment interaction was found for most of the characters observed. For growth period in particular, the implication is that it may be difficult to develop early, wide adapted varieties. Heritability estimates for half-sib selection varied from h2=0.70 for the head form to h2=0.38 for growth period. The heritability estimates for full-sib within half-sib selection were significantly lower. Estimated correlations between characters were considerably lower than those reported by others, ranging from 4. 3 4 to 0.54. No reciprocal differences were observed.
A selection index for population improvement in white cabbage (Brassica oleracea L. var. capitata)
Hereditas, 2008
A genotype's value as a parent in a synthetic, the varietal ability, can be predicted for a specific trait. For population improvement of varietal ability. the predicted value can be handled as a quantitative character and subjected to selection. The values for several traits can be combined in an index. The optimum. the base, and the desired gains indices were assessed for use in a cabbage breeding programme. Varying the number of parents in the predictors, we found an optimum to be at about four parental genotypes in the synthetic. A further increase in number of parental genotypes gave marginal increases in predicted responses, while a reduction resulted in relatively large decreases. The indices were ranked in the following order according to the predicted overall responses: optimum, base, and desired gains, the two first being almost equal. In winter white cabbage, it is possible to complete one breeding cycle each year if the general synthesizing abilities (GSAs) for growth period and weight in December are included in the index. Weight at the end of the storage period will be improved as a correlated response.
Agronomical characteristics of 20 cultivars of cabbage (Brassica oleraceae L.) in field conditions
2010
Cabbage production is a large and vital part of the Slovenian vegetable industry, especially in the northeast and central regions of the state. Strict market quality standards and Slovenian's long cabbage season (late March-mid November) requires that grovers selected cultivars not only desired by the market but also adapted to a wide range of environmental and production conditions. This research was undertaken to provide Slovenian growers with information that can employ in cultivar selection. The study was therefore aimed at evaluating the yield performance of new cabbage cultivars compared with the commonly grown cultivars with the objective of identyfying the best that is capable of giving satisfactory yield for open field conditions in Ljubljana. The result obtained showed that new cultivars Autumn queen F1, R1-Cross F1 and Cheers F1 produced largest head weight. The commercial yield (on an area and per unit basis) of these cultivars was significantly higher than the rest ...
Hereditas, 2008
winter white cabbage breeding population was examined for storage ability under two different storage regimes. The genetic variation displayed increased under nonoptimal conditions. Discrimination of the genetic entries was not fully satisfactory when only the mean yield was considered. Transformation of the yield data from each trimming session to a quadratic function of the time in storage showed that the mean and the linear component gave best discrimination between the genetic entries.
This study carried out to determine morphological traits of new experimental hybrids of cabbage and their parents. To determine morphological variability among tested hybrids and parents, they were analyzed for 34 morphological traits using Principal Component Analysis (PCA) and Cluster Analysis (CA). Results of the PCA indicated that the first three principal components accounted for 39.76% of the total variability among the 28 cabbage hybrids and 45.34% of the total variability among 22 cabbage parents for all the traits investigated. The first principal component (PC1) were the most important component and cabbage traits that constitute the PC1 (such as plant height, plant diameter, weight of head, diameter of head and length of head) were in fact the characteristics considered by breeders to be of greatest importance in cabbage breeding. At the result of CA, the cabbage hybrids were divided into eleven clusters and the cabbage parents were divided into nine clusters. PCA and CA confirmed that the cabbage hybrids and their parents were highly variable and had principally a significant variation for yield and yield components. ÖZET: Bu çalışma, yeni deneysel beyaz baş lahana hibritleri ve onların ebeveynlerinin morfolojik özelliklerini belirlemek için yürütülmüştür. İncelenen hibritler ve ebeveynler arasındaki morfolojik varyabiliteyi belirlemek amacıyla hibritler ve ebeveynler 34 morfolojik özellik için ana bileşen analizi ve kümeleme analizi ile analiz edilmiştir. Ana bileşen analizinin sonuçları ilk üç temel bileşenin araştırılan tüm morfolojik özellikler için 28 beyaz baş lahana hibriti arasındaki toplam varyabilitenin %39.76'sını ve 22 beyaz baş lahana ebeveyni arasındaki toplam varyabilitenin %45.34'ünü açıkladığını göstermiştir. İlk temel bileşen en önemli bileşen olarak bulunmuştur ve onu oluşturan özellikler (bitki boyu, bitki eni, baş ağırlığı, baş çapı ve baş yüksekliği) aslında lahana ıslahında ıslahçılar tarafından en büyük öneme sahip özellikler olarak düşünülmektedir. Kümeleme analizinin sonucunda beyaz baş lahana hibritlerinin 11 grupta ve ebeveynlerin 9 grupta kümelendiği belirlenmiştir. Ana bileşen analizi ve kümeleme analizi beyaz baş lahana hibritleri ve onların ebeveynlerinin oldukça değişkenlik gösterdiğini, verim ve verim bileşenleri için önemli bir varyasyona sahip olduklarını doğrulamıştır. Anahtar kelimeler: Islah, lahana, kümeleme analizi, morfolojik varyasyon, ana bileşen analizi Determination of Morphological Variability among Cabbage (Brassica oleracea var. capitata L.) Hybrids and Their Parents Beyaz Baş Lahana (Brassica oleracea var. capitata L.) Hibritleri ve