Abstract
Transfer of gene resistant to stripe rust new races from hexaploid Triticale into T.aestivum by cross fertilization between hexaploid Tritical and T.aestivum as well as multiple back crossing was conducted.Twelve new germplasm with stripe rust new race resistance were developed and evaluated in experiments under field and greenhouse conditions.Eight new germplasm had better resistant to stripe rust new races in both seedling and adult plants.Crossing characteristic between T.aestivum and hexaploid Tritical was studied,the result showed that the percentage of seed set in reciprocal cross between T.aestivum and hexaplid Tritical was high,but the percentage of seedling in reciprocal cross was very significantly different.Percentage of seedling in hexaploid Tritical × T.aestivum was higher because endosperm developed very well than that in T.aestivum × hexaploid Tritical because endosperm developed bad.Many seeds and seedlings were obtained by back crossing.
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Claims 6
Claim · model-written summary
Twelve stripe-rust-resistant germplasms were developed and evaluated.
Verbatim
e0“Twelve new germplasm with stripe rust new race resistance were developed and evaluated in experiments under field and greenhouse conditions”
t0“T.aestivm”
Claim · model-written summary
Eight germplasms had better resistance to new stripe rust races in seedlings and adults.
Verbatim
e0“Eight new germplasm had better resistant to stripe rust new races in both seedling and adult plants”
t0“T.aestivm”
Claim · model-written summary
Reciprocal crosses had high seed set.
Verbatim
e0“the percentage of seed set in reciprocal cross between T.aestivum and hexaplid Tritical was high”
Claim · model-written summary
Reciprocal crosses differed very significantly in seedling percentage.
Verbatim
e0“the percentage of seedling in reciprocal cross was very significantly different”
t0“T.aestivm”
Claim · model-written summary
The triticale by wheat cross had higher seedling percentage than the reverse cross.
Verbatim
e0“Percentage of seedling in hexaploid Tritical × T.aestivum was higher because endosperm developed very well than that in T.aestivum × hexaploid Tritical because endosperm developed bad”
Claim · model-written summary
Backcrossing yielded many seeds and seedlings.
Verbatim
e0“Many seeds and seedlings were obtained by back crossing”
t0“T.aestivm”