Do you want to publish a course? Click here

Heterosis Study of Some Quantity Characters of Squash Cucurbita pepo, L

دراسة قوة الهجين لبعض الصفات الكمية في قرع الكوسا .L pepo Cucurbita

2015   0   36   0 ( 0 )
 Publication date 2011
  fields Groves
and research's language is العربية
 Created by Shamra Editor




Ask ChatGPT about the research

This study was conducted at Research Altyba station where belongs GCSAR during 2007-2008. by using nine parental lines and their 36 F1 hybrids, were obtained from 9x9 half diallel design. The study included stem, earliness and yield component characters, in order to estimate of hetrerosis compare to the mid parents, the better parent and to the standard hybrid, and determine the superior hybrids advantage to invest in agricultural production and benefit from as well as in breeding program development yield of squash. Heterosis over mid parent was evident in all yield components, The hybrid (IL3XIL6) exhibited (16.89 ، 57.57%) respectively for the ratio pistilate flower % and fruit number per plant, negative heterobeltiosis (-13.71%) was recorded by the hybrid (IL3XIL8)for the number of nodes to first flower, While the hybrid (IL3XIL5) showed maximum positive and significant heterobeltiosis (13.06 %) for ratio pistilate flower%, and the hybrid (IL3XIL6) for fruit number per plant (59.47 %) Whereas the results showed that, four hybrids had positive and high significant standard heterosis for plant yield, the hybrid (IL6xIL7) and (IL3XIL6) had maximum value (32.38, 28.68% ) respectively



References used
Ahmed, E. A.; Iban Oaf, H. S. and El Jak, A. E. (2003). Combining abilities and heterosis in Line x Tester crosses of summer squash (Cucurbita pepo L.). Cucurbit Genetics Cooperative Report 26:54-56
Arnel, R. H. and Miranda, J. B. (1981). Quantitative genetics in maize breeding. Iowa State University press, Ames.468p
Bassett, J. M. (1986). Breeding vegetable crops, AVI Publishing company, INC, westport, Connecticut. U.S.A. pp: 214-219
rate research

Read More

In this research, nine inbreed lines of squash (Cucurbita pepo, L) have been studied during 2007-2008 seasons. The study contains plant phonological phases, and the most important morphological and productivity characteristics related to fruit yie ld to evaluate the characteristics of every line and identify the economical lines to use it in the breeding programs. The study showed genetic variation between the groups for some important economic characteristics as (the number of fruits per plant, percentage of female flowers, yield per plant, stem long and number of nodes till the first female flower). The study also showed that the inbreed lines of squash is a rich source of variation and can be use in a breeding program to product squash hybrid. The results appeared also the positive correlation between the productivity and some important economic characteristics, such as percentage of female flowers (r=0.871**), the number of fruits per plant (r=0.976**). Whereas negative correlation with the nodes till he first female flower (r=- 0.494) and internodes long (r=- 0.447). Using cluster analysis, the inbreed lines were classified into 2 distinct classes A and B, Class A contained seven inbreed wreathe class B contained Tow inbreed lines.
This study was conducted at the vegetable field of department of horticulture and landscape design, college of agriculture and forestry ,Mosul university, during spring of 2007 and 2008, to study the effect of times and levels of nitrogen fertiliz ation on some characters vegetative growth, flowering ,and yield of summer squash .Result indicated that, the time of nitrogen fertilization at the stage of fruit-set caused a significant increased in the leaf number /plant ,length of the plant and the fresh weight/plant. While the time of nitrogen fertilization wasn't affected significantly the total yield. The level at 320 kg.N/ha caused a significant increase of the characters vegetative growth and total yield. Also result revealed that, the interaction between the stage at fruit set and nitrogen fertilization at 320 kg.N/ha led to increase the total yield .The yield was found to positively correlation with the plant length ,fresh and dry weights of plant, leaf area, fruit weight, male and female flowers, and the sex ratio.
This study was carried out through the cooperation between the Faculty of Agriculture Tishreen University and the General Commission of Agricultural Scientific Researches in Hama during 2013 and 2014 successive seasons. Eight soft wheat(Triticumae stivum)genotypes were crossed using half diallel method .The(28) crosses were grown along with their parents in randomized complete block with three replications to estimate general combiningability , specific combining ability, and both mid and high parent heterosis for number of spikes /plant , number of grains /spike , thousand grain weight and grain yield. The results indicated that both additive and non- additive types of gene action were important in the inheritance of traits under study with preponderance of additive gene effects for number of grains /spike and thousand grain weight,Non – additive gene effects were pronounced in the inheritance of number of spikes /plant and grain yield. High general combiners for thesecharacters were obtained and the most important parents were: Bohouth 4- Douma 44828-Acsad1115- Golan2. Many positive specific combiners having both mid and high parent heterosis and derived from positive general combiners were obtained such as(Golan2×Cham10) – (Acsad1115×Douma4)(Douma44828×Golan2) and (Douma 2×Golan2). Results also indicated that some hybrids: (Douma44828×Golan2) (Bohouth6×Douma4) (Douma44828×Cham10) (Douma2×Acsad1115) had heterosis compared to higher parent for number of spikes /plant , number of grains / spike , Thousand grain weight and grain yield..
Six population seeds of three yellow maize hybrids were formed at Agricultural Research Center, Homs, during 2008 and 2009 growing seasons. Their plants were evaluated in 2010. The present work aims to determine the genetic parameters in six populati ons (P1, P2, F1, F2, BC1, and BC2). Mean square results showed significant differences among mean values for all traits in all crosses. Significant heterosis values were positive and relative comparing to mid and better parent for most traits. The potence ratios exceeded (+1) in all traits and crosses except ear height, indicating thus over-dominance. In breeding, depression values were significant in most traits for Cross-1, while their values were non- significant in all traits for Cross-2 except plant height, and also in Cross-3 except plant height and grain yield per plant. In most traits epestasis or dominance gene action occupied the first rank in the genetic effects in order of importance to cross, with the exception of number of rows per ear, number of kernels per row and grain yield per plant where additive gene action occupied the first rank for Cross-2 and Cross-1 respectively. Therefore, it could be suggested that selection for most studied traits in the subsequent generations will be relatively more effective than in the early generations.
A half diallel set of crosses among six highly diverse barley (Hordeum vulgare L.) genotypes were evaluated at Karahta station of field crops research (GCSAR) Damascus Governorate, during 2010-2011 and 2011-2012 seasons to study heterosis and comb ining ability components for plant height, grain yield per plant, number of spikes per plant, number of grains per spike and thousand kernel weight.
comments
Fetching comments Fetching comments
Sign in to be able to follow your search criteria
mircosoft-partner

هل ترغب بارسال اشعارات عن اخر التحديثات في شمرا-اكاديميا