The results of the analyses of karyotypes show that the karyotypie formula of father variety(No. 2), mother variety (No. 12) and hybrid(Lian he No.1) are 2n=2x=2sm+8st+2t, 2n=2x=4sm+4st+4t and 2n=2x=2sm+6st+4t respectively.
It was found that immune male-sterile line Tx622A seemed to have dominant gene for resistance as hybrids produced from it with 4003, "Jinfu-1",298/4003 and "Jinhui-75"are immune,hybrid. Tx622A×208 is highly resistant and hybrid Tx622A×"Baiping" is resistant.
Two castor cross classification (CSR181 and CSR6,CSR268 and CSR63) and their hybrids (CSR6.181(F1),CSR6.181(F2),CSR63.268(F1)) fiom Franch were studied in this paper/Though field experiment, the agronomic perfermance, growth-speed and other indexes were observed and mensurated.
Huyouza No. 2 is a hybrid variety of Brassica napus L. based on the recessive genic male two-type line 20118AB whose fertility is controlled by 2 recessive duplicate genes and 1 recessive epistatic gene. Its oil content of seeds is 40.7%, erucic acid content of oil is 1.12%, and glucosinolate content of meal is 19.84μmol/g.
The hybrid variety is early -moderate maturing, with green -yellow, horn -like fruits in 21~25cm of fruit length, 3, 1 - 3. 6cm fruit shoulder, 0. 3cm fruit flesh and 47~ 70g weight per fruit. It is tolerant to transpotation and resistant to virus diseases, with little pungency and good commercial quality.
Koehne) and three hybrid species (P. ×xiaozhuanica W. Y. Hsu & Liang, P. ×beijingensis W. Y. Hsu, P. ×canadensis Moench, P. ×canadensis Moench cv. “serotina”, P. ×canadensis Moench cv. “Sacrau 79”, P. ×canadensis Moench cv. “I-214”) are reported. These taxa represent five sections of the genus.
Through analysis of variance,correlation and path on several main characteristics of 15 narrow sub Bt gene anti-insect cotton hybrid species that result show: the character change of the yield of cotton lint,the bolls of a cotton plant,lint percentage,boll weight of 15 narrow sub Bt gene anti-insect cotton that it is extremely notable.
Promising methods for (1) detecting various compounds using hybrids of substrate-binding modules with antibodies and (2) locating polysaccharides in live tissues are reviewed as well.
A positive correlation between the activity level of acid cysteine proteinases in eggs of parental breeds and a set of commercial characteristics of their hybrids was detected, indicating the possibility of predicting the degree of heterosis.
A comparative study of the composition of gliadin proteins in grains of different-quality wheat cultivars Rollo and Drott and four forms of the hybrids F9 and F10 obtained by crossing these cultivars has been performed.
In hybrids, this semilethal is suppressed by the normal allele, and then a more unbalanced complex of modifier genes initiates a heterosis two to three times more vigorous than in standard hybrids.
A method is developed to fix heterosis through the backcrosses of females of the high-heterosis hybrids to the absolutely homozygous males of androgenetic origin obtained from these females.
On the marigold(Tagetes hybrid) variety Polynema the life cycle was completed only at 30.0°C.
The duplication can in principle be applied in a hybrid variety using chromosomal male sterility genes.
A rather similar trend was observed in "Vilma" hybrid variety: it reached R1 stage at 7 July, and L1 larvae appeared only a few days later (11 July, 3.8 larvae/50?cobs) (LAG?= -1).
However, "Maxima" hybrid variety reached R1 stage 1?week later (14 July) than the time of peak captures.
The best immediate results were obtained when plants of Primeur were combined with some plants of varieties which are adapted to the same ecological conditions.5.For the breeding of a hybrid variety a simple form of recurrent selection is suggested.
unisexualis, but the polymorphism levels of the paternal, maternal, and hybrid species were shown to be somewhat different.
There were very great similar values among natural hybrid species.
Nutrient element contents of cutting seedlings of hybrid species (Liriodendron chinense xtulipifera)
The origin and evolution of a hybrid species complex in the genus Brassica (cabbage, turnip, mustard, rapeseed oil) has been explored through mutational analysis of the maternally inherited chloroplast genome.
Restriction-fragment-length-polymorphisms (RFLPs) of rDNA spacers and fluorescent-in-situ-hybridization (FISH) of an 18S-gene probe to mitotic chromosomes were used to compare parental and hybrid species.